diff options
Diffstat (limited to 'drivers/usb/host/ehci-pci.c')
| -rw-r--r-- | drivers/usb/host/ehci-pci.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index 56c78e9..35a533e 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -44,6 +44,35 @@ static int ehci_pci_reinit(struct ehci_hcd *ehci, struct pci_dev *pdev) return 0; } +static int ehci_quirk_amd_SB800(struct ehci_hcd *ehci) +{ + struct pci_dev *amd_smbus_dev; + u8 rev = 0; + + amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI, 0x4385, NULL); + if (!amd_smbus_dev) + return 0; + + pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev); + if (rev < 0x40) { + pci_dev_put(amd_smbus_dev); + amd_smbus_dev = NULL; + return 0; + } + + if (!amd_nb_dev) + amd_nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1510, NULL); + if (!amd_nb_dev) + ehci_err(ehci, "QUIRK: unable to get AMD NB device\n"); + + ehci_info(ehci, "QUIRK: Enable AMD SB800 L1 fix\n"); + + pci_dev_put(amd_smbus_dev); + amd_smbus_dev = NULL; + + return 1; +} + /* called during probe() after chip reset completes */ static int ehci_pci_setup(struct usb_hcd *hcd) { @@ -102,6 +131,9 @@ static int ehci_pci_setup(struct usb_hcd *hcd) /* cache this readonly data; minimize chip reads */ ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); + if (ehci_quirk_amd_SB800(ehci)) + ehci->amd_l1_fix = 1; + retval = ehci_halt(ehci); if (retval) return retval; |
