--- zzzz-none-000/linux-4.4.271/drivers/usb/host/xhci-hub.c	2021-06-03 06:22:09.000000000 +0000
+++ maple-fsgw-759/linux-4.4.271/drivers/usb/host/xhci-hub.c	2023-12-20 10:37:30.000000000 +0000
@@ -27,6 +27,11 @@
 #include "xhci.h"
 #include "xhci-trace.h"
 
+#if defined (CONFIG_AVM_KERNEL)
+/* 20160219 AVM/VGJ USB3 ports switchable */
+extern int usb3port_config;
+#endif
+
 #define	PORT_WAKE_BITS	(PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E)
 #define	PORT_RWC_BITS	(PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | \
 			 PORT_RC | PORT_PLC | PORT_PE)
@@ -1099,8 +1104,21 @@
 			 * However, hub_wq will ignore the roothub events until
 			 * the roothub is registered.
 			 */
-			writel(temp | PORT_POWER, port_array[wIndex]);
+#if defined (CONFIG_AVM_KERNEL)
+			{
+				/* 20170811 AVM/VGJ USB3 ports switchable */
+				const int port_bit = (hcd->self.busnum < 3)? 1: 2;
+				temp |= PORT_POWER;
+				if ((hcd->speed == HCD_USB3) && !(usb3port_config & port_bit) ) {
+					temp &= ~PORT_POWER;
+					printk (KERN_INFO "AVM: disable USB3 bus#%d port#%d config=%x\n", hcd->self.busnum, wIndex, usb3port_config);
+				}
 
+				writel(temp, port_array[wIndex]);
+			}
+#else
+			writel(temp | PORT_POWER, port_array[wIndex]);
+#endif
 			temp = readl(port_array[wIndex]);
 			xhci_dbg(xhci, "set port power, actual port %d status  = 0x%x\n", wIndex, temp);