From ef53b8c4ce2919d6685d2dc0c51a91a180433ff0 Mon Sep 17 00:00:00 2001
From: Sriram Dash <sriram.dash@nxp.com>
Date: Mon, 13 Jun 2016 09:58:36 +0530
Subject: usb: xhci: fsl: Add workaround for USB erratum A008751

This patch is doing the following:
1. Implementing the errata for LS2080.
2. Adding fixup for fdt for LS2080.

Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
---
 drivers/usb/host/xhci-fsl.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'drivers/usb/host')

diff --git a/drivers/usb/host/xhci-fsl.c b/drivers/usb/host/xhci-fsl.c
index 05f09d7..c12a189 100644
--- a/drivers/usb/host/xhci-fsl.c
+++ b/drivers/usb/host/xhci-fsl.c
@@ -15,6 +15,8 @@
 #include <linux/usb/xhci-fsl.h>
 #include <linux/usb/dwc3.h>
 #include "xhci.h"
+#include <fsl_errata.h>
+#include <fsl_usb.h>
 
 /* Declare global data pointer */
 DECLARE_GLOBAL_DATA_PTR;
@@ -27,6 +29,26 @@ __weak int __board_usb_init(int index, enum usb_init_type init)
 	return 0;
 }
 
+static int erratum_a008751(void)
+{
+#if defined(CONFIG_TARGET_LS2080AQDS) || defined(CONFIG_TARGET_LS2080ARDB)
+	u32 __iomem *scfg = (u32 __iomem *)SCFG_BASE;
+	writel(SCFG_USB3PRM1CR_INIT, scfg + SCFG_USB3PRM1CR / 4);
+	return 0;
+#endif
+	return 1;
+}
+
+static void fsl_apply_xhci_errata(void)
+{
+	int ret;
+	if (has_erratum_a008751()) {
+		ret = erratum_a008751();
+		if (ret != 0)
+			puts("Failed to apply erratum a008751\n");
+	}
+}
+
 static int fsl_xhci_core_init(struct fsl_xhci *fsl_xhci)
 {
 	int ret = 0;
@@ -69,6 +91,8 @@ int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
 		return ret;
 	}
 
+	fsl_apply_xhci_errata();
+
 	ret = fsl_xhci_core_init(ctx);
 	if (ret < 0) {
 		puts("Failed to initialize xhci\n");
-- 
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