USB: Set AHB HPROT Mode to allow posted data writes
Currently writing 0x0 into AHBMODE register which means both data
transactions and QH and TD descriptors are non-posted writes to
system memory. As per HW team recommendation, should write 0x08 value
to set AHB HPROT mode into the AHBMODE register which allows posted
data writes to system memory and will improve the throughput numbers.
Change-Id: Ib44a8cfe11c6ff96ff712643227532e24548e706
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
diff --git a/drivers/usb/host/ehci-msm.c b/drivers/usb/host/ehci-msm.c
index 5649fd0..6a86632 100644
--- a/drivers/usb/host/ehci-msm.c
+++ b/drivers/usb/host/ehci-msm.c
@@ -1,6 +1,6 @@
/* ehci-msm.c - HSUSB Host Controller Driver Implementation
*
- * Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved.
+ * Copyright (c) 2008-2012, Code Aurora Forum. All rights reserved.
*
* Partly derived from ehci-fsl.c and ehci-hcd.c
* Copyright (c) 2000-2004 by David Brownell
@@ -67,7 +67,7 @@
/* bursts of unspecified length. */
writel(0, USB_AHBBURST);
/* Use the AHB transactor */
- writel(0, USB_AHBMODE);
+ writel_relaxed(0x08, USB_AHBMODE);
/* Disable streaming mode and select host mode */
writel(0x13, USB_USBMODE);