From: Vincent Palatin <vpalatin@chromium.org>
Date: Thu, 13 Dec 2012 01:55:22 +0000 (-0800)
Subject: usb: ehci: Add 64-bit controller support
X-Git-Tag: submit/tizen/20160318.071304~287
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6a62b22810835c5e720a82724aad19c20f09efe3;p=profile%2Fcommon%2Fplatform%2Fkernel%2Fu-boot-artik.git

usb: ehci: Add 64-bit controller support

On EHCI controller with 64-bit address space support, we must initialize
properly the high word for the PCI bus master accesses.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
---

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 9cfacd78e..fdf873abc 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -862,6 +862,9 @@ int usb_lowlevel_init(int index, void **controller)
 	if (ehci_hcd_init())
 		return -1;
 #endif
+	/* Set the high address word (aka segment) for 64-bit controller */
+	if (ehci_readl(&ehcic[index].hccr->cr_hccparams) & 1)
+		ehci_writel(ehcic[index].hcor->or_ctrldssegment, 0);
 
 	/* Set head of reclaim list */
 	memset(qh_list, 0, sizeof(*qh_list));