diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/ehci-tegra.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index fae63e219803..9981414b5790 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -946,6 +946,16 @@ static int tegra_ehci_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, static void tegra_ehci_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) { + struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller); + + /* Fence read for coherency of AHB master intiated writes */ + if (tegra->phy->instance == 0) + readb(IO_ADDRESS(IO_PPCS_PHYS + USB1_PREFETCH_ID)); + else if (tegra->phy->instance == 1) + readb(IO_ADDRESS(IO_PPCS_PHYS + USB2_PREFETCH_ID)); + else if (tegra->phy->instance == 2) + readb(IO_ADDRESS(IO_PPCS_PHYS + USB3_PREFETCH_ID)); + usb_hcd_unmap_urb_for_dma(hcd, urb); free_dma_aligned_buffer(urb); } |