From: Mark Kettenis <kettenis@openbsd.org>
Date: Thu, 16 Sep 2021 14:00:09 +0000 (+0200)
Subject: usb: xhci-dwc3: Add support for USB 3.1 controllers
X-Git-Tag: v2022.01~102^2~6^2~63
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=275c4f25f752f313d8284b4176889c4dd0a7940b;p=platform%2Fkernel%2Fu-boot.git

usb: xhci-dwc3: Add support for USB 3.1 controllers

This adds support for the DWC_sub31 controllers such as those
found on Apple's M1 SoC.  This version of the controller
seems to work fine with the existing driver.

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
---

diff --git a/drivers/usb/host/xhci-dwc3.c b/drivers/usb/host/xhci-dwc3.c
index 5b12d13..bec0d98 100644
--- a/drivers/usb/host/xhci-dwc3.c
+++ b/drivers/usb/host/xhci-dwc3.c
@@ -74,7 +74,8 @@ int dwc3_core_init(struct dwc3 *dwc3_reg)
 
 	revision = readl(&dwc3_reg->g_snpsid);
 	/* This should read as U3 followed by revision number */
-	if ((revision & DWC3_GSNPSID_MASK) != 0x55330000) {
+	if ((revision & DWC3_GSNPSID_MASK) != 0x55330000 &&
+	    (revision & DWC3_GSNPSID_MASK) != 0x33310000) {
 		puts("this is not a DesignWare USB3 DRD Core\n");
 		return -1;
 	}