problem with attaching device to LPC bus

[karu.pruun]

Tested with 9ed6fc but the result is the same: 0x0700-0x07fe.

I ran a quick test with linux too, where cat /proc/ioports | grep gmux
shows:

0700 - 07fd : Apple gmux

Interesting. . .

Cheers

Peeter

--





On Thu, Aug 25, 2016 at 4:50 AM, Sepherosa Ziehau <sepherosa at gmail.com>
wrote:

> I have pushed a slightly different one to the master; it should fix
> this problem too.  Please test.
>
> Thanks,
> sephe
>
> On Thu, Aug 25, 2016 at 9:24 AM, Sepherosa Ziehau <sepherosa at gmail.com>
> wrote:
> > On Thu, Aug 25, 2016 at 2:43 AM, karu.pruun <karu.pruun at gmail.com>
> wrote:
> >> Yay, it works!
> >>
> >> # kldload ./gmux_off_acpi.ko
> >>
> >> gives:
> >> gmux_off_acpi0: <apple gmux controller> port 0x700-0x7fe on acpi0
> >
> > Grrr, this looks a bit weird, probably should be 0x700~0x7ff :).  Let
> > me check the acpi spec, and update the patch, stay tuned.
> >
> >>
> >> 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
> >>
> >>
> >
> >
> >
> > --
> > Tomorrow Will Never Die
>
>
>
> --
> Tomorrow Will Never Die
>
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