OT: Asus M2V-MX SE (VIA K8T890): vendor BIOS: SATA-II disk only detected as UDMA/100

[Paul Menzel]

Dear coreboot folks,

this question is off-topic because the board is running the vendor BIOS.

$ sudo dmidecode
        […]
        # dmidecode 2.9
        SMBIOS 2.4 present.
        49 structures occupying 1801 bytes.
        Table at 0x000F0740.

Handle 0x0000, DMI type 0, 24 bytes
        BIOS Information
                Vendor: American Megatrends Inc.
                Version: 0304   
                Release Date: 10/30/2007
                Address: 0xF0000
                Runtime Size: 64 kB
                ROM Size: 512 kB
        […]

I had to replace my hard drive and bought a new SATA-II disk.
Unfortunately the full speed is not detected. Instead of UDMA/133 – as
was used with the old SATA-I disk – it is reporting UDMA/100.

$ uname -a
        Linux joe 2.6.32-5-amd64 #1 SMP Tue Mar 8 22:49:26 UTC 2011 x86_64 GNU/Linux
        $ dmesg # new SATA-II disk
        […]
        [    0.792878] ata3: SATA max UDMA/133 cmd 0xec00 ctl 0xe880 bmdma 0xe400 irq 21
        [    0.792881] ata4: SATA max UDMA/133 cmd 0xe800 ctl 0xe480 bmdma 0xe408 irq 21
        […]
        [    1.384015] ata4: SATA link up 1.5 Gbps (SStatus 123 SControl 300)
        [    1.392019] usb 2-1: new low speed USB device using uhci_hcd and address 2
        [    1.548219] ata4.00: ATA-8: WDC WD20EARS-60MVWB0, 51.0AB51, max UDMA/100

Here seems to be the problematic line, that somehow the drive is
reporting the wrong maximum speed or the chipset does not detect it
correctly.

[    1.548223] ata4.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 0/32)
        [    1.556240] ata4.00: configured for UDMA/100
        [    1.556343] scsi 3:0:0:0: Direct-Access     ATA      WDC WD20EARS-60M 51.0 PQ: 0 ANSI: 5
        […]
        $ dmesg # old SATA-I disk
        [    0.779300] ata1: SATA max UDMA/133 cmd 0xec00 ctl 0xe880 bmdma 0xe400 irq 21
        [    0.779303] ata2: SATA max UDMA/133 cmd 0xe800 ctl 0xe480 bmdma 0xe408 irq 21
        […]
        [    0.980024] ata1: SATA link up 1.5 Gbps (SStatus 123 SControl 300)
        [    0.980427] ata3.00: configured for UDMA/33
        [    1.144418] ata1.00: ATA-8: Hitachi HDP725050GLA360, GM4OA52A, max UDMA/133
        [    1.144421] ata1.00: 976773168 sectors, multi 16: LBA48 NCQ (depth 0/32)
        [    1.160414] ata1.00: configured for UDMA/133
        [    1.160566] scsi 0:0:0:0: Direct-Access     ATA      Hitachi HDP72505 GM4O PQ: 0 ANSI: 5
        [    1.364012] ata2: SATA link down 1.5 Gbps (SStatus 0 SControl 300)
        […]

So I am posting this question to the coreboot list since you guys having
ported the Asus M2V-MX SE to coreboot probably know of some limitations
of the VIA chipset and how to solve this. If not a pointer to the
correct list would be nice.

Thanks,

Paul