> Everyone:
>
> Here is a preliminary patch for the UHCI driver that may solve the
> problem with VIA controllers. I don't have any way to test it since I
> don't have any VIA boards (yet).
>
> The worst that might happen is that the controller won't work at all. I
> expect things won't be that bad.
>
> Please try the patch and let me know what happens.
>
> Alan Stern
>
>
> --- 2.6/drivers/usb/host/uhci-hcd.c.orig Sun Feb 8 11:35:24 2004
> +++ 2.6/drivers/usb/host/uhci-hcd.c Sat Feb 14 15:57:59 2004
> @@ -2199,6 +2199,25 @@
> */
> reset_hc(uhci);
> pci_write_config_word(hcd->pdev, USBLEGSUP, USBLEGSUP_DEFAULT);
> +
> + /* This workaround prevents VIA controllers from shutting themselves
> + * off when they receive a babble packet (I hope).
> + */
> + if (hcd->pdev->vendor == PCI_VENDOR_ID_VIA) {
> + u8 val;
> + int rc;
> +
> + rc = pci_read_config_byte(hcd->pdev, 0x40, &val);
> + if (rc == 0 && !(val & 0x40)) {
> + rc = pci_write_config_byte(hcd->pdev, 0x40,
> + val | 0x40);
> + if (rc == 0)
> + info("VIA UHCI babble workaround applied\n");
> + }
> + if (rc)
> + warn("Unable to apply VIA UHCI babble "
> + "workaround: %d\n", rc);
> + }
> return 0;
> }
>
dmesg with patch to fix VIA babble problem
http://virtual.shia.ws:8000/~informatica/otros/dmesg-withpatch3.txt
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