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path: root/drivers/usb/dwc2/platform.c
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Diffstat (limited to 'drivers/usb/dwc2/platform.c')
-rw-r--r--drivers/usb/dwc2/platform.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index 4c0819554bcd..9a53a58e676e 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -353,6 +353,23 @@ static void dwc2_driver_shutdown(struct platform_device *dev)
}
/**
+ * dwc2_check_core_endianness() - Returns true if core and AHB have
+ * opposite endianness.
+ * @hsotg: Programming view of the DWC_otg controller.
+ */
+static bool dwc2_check_core_endianness(struct dwc2_hsotg *hsotg)
+{
+ u32 snpsid;
+
+ snpsid = ioread32(hsotg->regs + GSNPSID);
+ if ((snpsid & GSNPSID_ID_MASK) == DWC2_OTG_ID ||
+ (snpsid & GSNPSID_ID_MASK) == DWC2_FS_IOT_ID ||
+ (snpsid & GSNPSID_ID_MASK) == DWC2_HS_IOT_ID)
+ return false;
+ return true;
+}
+
+/**
* dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
* driver
*
@@ -395,6 +412,8 @@ static int dwc2_driver_probe(struct platform_device *dev)
dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
(unsigned long)res->start, hsotg->regs);
+ hsotg->needs_byte_swap = dwc2_check_core_endianness(hsotg);
+
retval = dwc2_lowlevel_hw_init(hsotg);
if (retval)
return retval;