From: Liviu Dudau <liviu.du...@arm.com>
arm64 architecture handles correctly 64bit DMAs and can enable support
for 64bit EHCI host controllers.
Signed-off-by: Liviu Dudau <liviu.du...@arm.com>
Signed-off-by: Ryan Harkin <ryan.har...@linaro.org>
Signed-off-by: Mark Brown <broo...@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
}
--
2.0.0.rc2
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