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authorSriram Dash <sriram.dash@nxp.com>2016-06-13 09:58:36 +0530
committerMarek Vasut <marex@denx.de>2016-06-13 15:16:46 +0200
commitef53b8c4ce2919d6685d2dc0c51a91a180433ff0 (patch)
treea8e74bad3688faf65dcdee23c5ea28c32abd00df /drivers/usb/host
parent32fbd46f38ed183ae92aabc0a2abd7847bc3363e (diff)
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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>
Diffstat (limited to 'drivers/usb/host')
-rw-r--r--drivers/usb/host/xhci-fsl.c24
1 files changed, 24 insertions, 0 deletions
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");