problem with attaching device to LPC bus

[karu.pruun]

Yay, it works!

# kldload ./gmux_off_acpi.ko

gives:
gmux_off_acpi0: <apple gmux controller> port 0x700-0x7fe on acpi0

And the dmesg does not contain the unsupported range message any more.

Will you commit this to master?

Many thanks again!

Peeter

--




On Wed, Aug 24, 2016 at 11:22 AM, Sepherosa Ziehau <sepherosa at gmail.com>
wrote:

> Try this patch:
> https://leaf.dragonflybsd.org/~sephe/acpi_iorange.diff
>
> On Wed, Aug 24, 2016 at 4:16 PM, Veiko Palge <veiko.palge at gmail.com>
> wrote:
> > dmesg attached --- yes, there is one:
> >
> > unknown: I/O range not supported
> >
> > I should also mention that I am not loading the driver at boot time; I
> > do kldload and kldunload after boot.
> >
> >
> > Peeter
> >
> > --
> >
> >
> > On 24 August 2016 at 11:06, Sepherosa Ziehau <sepherosa at gmail.com>
> wrote:
> >> Did you get any "I/O range not supported" in your dmesg?
> >>
> >> Thanks,
> >> sephe
> >>
> >> On Tue, Aug 23, 2016 at 9:23 PM, karu.pruun <karu.pruun at gmail.com>
> wrote:
> >>> Hello
> >>>
> >>> This is a newbie question: I am trying to write a simple DragonFly
> kernel
> >>> module for the gmux device that is attached to the LPC bus. Probing
> works
> >>> fine but I am stuck with the attachment routine: I can't allocate IO
> ports
> >>> for the device.
> >>>
> >>> The device shows up in the device tree but is not attached:
> >>>
> >>> ---
> >>> # devinfo -rv | grep GMUX:
> >>>
> >>> unknown pnpinfo _HID=APP000B _UID=0 at handle=\_SB_.PCI0.LPCB.GMUX
> >>> ---
> >>>
> >>> I looked up acpi tables (acpidump etc), the IO resources for GMUX seem
> to be
> >>> there:
> >>>
> >>> --- ---
> >>>     Scope (\_SB.PCI0.LPCB)
> >>>     {
> >>>         Device (GMUX)
> >>>         {
> >>>             Name (_HID, EisaId ("APP000B"))  // _HID: Hardware ID
> >>>             Name (_CID, "gmux")  // _CID: Compatible ID
> >>>             Name (_STA, 0x0B)  // _STA: Status
> >>>             Name (_CRS, ResourceTemplate ()  // _CRS: Current Resource
> >>> Settings
> >>>             {
> >>>                 IO (Decode16,
> >>>                     0x0700,             // Range Minimum
> >>>                     0x07FF,             // Range Maximum
> >>>                     0x01,               // Alignment
> >>>                     0xFF,               // Length
> >>>                     )
> >>>             })
> >>> --- ---
> >>>
> >>> Also, looking devinfo -rv shows that the range 0x0700 to 0x07FF has
> been set
> >>> aside by the kernel:
> >>>
> >>> ---
> >>> # devinfo -u
> >>>
> >>> . . .
> >>> I/O ports:
> >>>     . . .
> >>>     0x400 - 0x1fff (root0)
> >>>     . . .
> >>> ---
> >>>
> >>> So am I right supposing that bus_alloc_resource_any should be able to
> claim
> >>> the range 0x700 to 0x7FF for the gmux device? At the moment, trying to
> >>> allocate IO ports with bus_alloc_resource returns NULL.
> >>>
> >>> I wonder if anyone has suggestions about what has gone wrong or where
> to dig
> >>> further? I attach the code.
> >>>
> >>> Thanks
> >>>
> >>> Peeter
> >>>
> >>> --
> >>>
> >>
> >>
> >>
> >> --
> >> Tomorrow Will Never Die
>
>
>
> --
> Tomorrow Will Never Die
>
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