From: Liviu Dudau Liviu.Dudau@arm.com
arm64 architecture handles correctly 64bit DMAs and can enable support for 64bit EHCI host controllers.
Signed-off-by: Liviu Dudau Liviu.Dudau@arm.com Signed-off-by: Ryan Harkin ryan.harkin@linaro.org Signed-off-by: Mark Brown broonie@linaro.org --- drivers/usb/host/ehci-hcd.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 81cda09b47e3..e704d403beae 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -590,11 +590,17 @@ static int ehci_run (struct usb_hcd *hcd) */ hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params); if (HCC_64BIT_ADDR(hcc_params)) { - ehci_writel(ehci, 0, &ehci->regs->segment); -#if 0 -// this is deeply broken on almost all architectures +#if CONFIG_ARM64 + ehci_writel(ehci, ehci->periodic_dma >> 32, + &ehci->regs->segment); + /* + * this is deeply broken on almost all architectures + * but arm64 can use it so enable it + */ if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64))) ehci_info(ehci, "enabled 64bit DMA\n"); +#else + ehci_writel(ehci, 0, &ehci->regs->segment); #endif }