[SeaBIOS] [PATCH V5 2/9] Provide ACPI SSDT table for TPM device + S3 resume support

[Stefan Berger]

On 08/04/2011 12:14 PM, Andreas Niederl wrote:
> Hi,
>
> On 07/06/2011 04:32 PM, Stefan Berger wrote:
>> Index: seabios/src/acpi-tpm-ssdt.dsl
>> ===================================================================
>> --- /dev/null
>> +++ seabios/src/acpi-tpm-ssdt.dsl
>> @@ -0,0 +1,22 @@
>> +DefinitionBlock (
>> +    "acpi-tpm-ssdt.aml",// Output Filename
>> +    "SSDT",             // Signature
>> +    0x01,               // SSDT Compliance Revision
>> +    "BXPC",             // OEMID
>> +    "BXSSDT",           // TABLE ID
>> +    0x1                 // OEM Revision
>> +    )
>> +{
>> +    /* TPM with emulated TPM TIS interface */
>> +    Device (TPM) {
>> +        Name (_HID, EisaID ("PNP0C31"))
>> +        Name (_CRS, ResourceTemplate ()
>> +        {
>> +                Memory32Fixed (ReadWrite, 0xFED40000, 0x00005000)
>> +                //IRQNoFlags () {11}
>> +        })
>> +        Method (_STA, 0, NotSerialized) {
>> +            Return (0x0F)
>> +        }
>> +    }
>> +}
> For some reason the Linux tpm_tis driver does not recognize the device
> (without using force=1) for me on Linux-2.6.33.
> However, the driver modules are being loaded automatically, but without
> registering a usable tpm device.
Hm, I don't need it but I am running later versions of Linux, i.e. 
2.6.35.13-92.fc14

> I'm no expert regarding ACPI but I noticed that the default SSDT
> provided by SeaBIOS uses the Scope(_SB) header (in build_ssdt()).
>
> Using this Scope(_SB) { ... } around the device entry in your SSDT, I've
> been able to successfully use the TPM device detection.
>
>
> Could you please include this header in your SSDT?
>
I'll add it.

Thanks for testing.

     Stefan