Merge branch 'usb-next' into musb-merge

[firefly-linux-kernel-4.4.55.git] / drivers / usb / host / ehci-pci.c

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 655f3c9f88bfbb6740e0ac5cc377b45c1af8adae..76179c39c0e3490b0a5e9240619b9e4ba18affb9 100644 (file)
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -22,6 +22,9 @@
 #error "This file is PCI bus glue.  CONFIG_PCI must be defined."
 #endif
 
+/* defined here to avoid adding to pci_ids.h for single instance use */
+#define PCI_DEVICE_ID_INTEL_CE4100_USB 0x2e70
+
 /*-------------------------------------------------------------------------*/
 
 /* called after powerup, by probe or system-pm "wakeup" */
@@ -41,6 +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)
 {
@@ -99,6 +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;
@@ -137,6 +172,10 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
                        ehci_info(ehci, "disable lpm for langwell/penwell\n");
                        ehci->has_lpm = 0;
                }
+               if (pdev->device == PCI_DEVICE_ID_INTEL_CE4100_USB) {
+                       hcd->has_tt = 1;
+                       tdi_reset(ehci);
+               }
                break;
        case PCI_VENDOR_ID_TDI:
                if (pdev->device == PCI_DEVICE_ID_TDI_EHCI) {