usb: xhci-mtk: disable all ports when disable host controller

This is used to avoid the ports status of IPPC being brought in kernel
stage, it may cause ports error especially when the xhci controller is
a component of dual-role controller.

Reported-by: Yun-Chien Yu <yun-chien.yu@mediatek.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 18b4f55d8962396a910d1c103907c925272437e5..3838a990ec37f34414997007c45e0d1d9671d8f8 100644 (file)
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -122,11 +122,13 @@ static int xhci_mtk_host_disable(struct mtk_xhci *mtk)
 
        /* power down all u3 ports */
        for (i = 0; i < mtk->num_u3ports; i++)
-               setbits_le32(mtk->ippc + IPPC_U3_CTRL(i), CTRL_U3_PORT_PDN);
+               setbits_le32(mtk->ippc + IPPC_U3_CTRL(i),
+                            CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS);
 
        /* power down all u2 ports */
        for (i = 0; i < mtk->num_u2ports; i++)
-               setbits_le32(mtk->ippc + IPPC_U2_CTRL(i), CTRL_U2_PORT_PDN);
+               setbits_le32(mtk->ippc + IPPC_U2_CTRL(i),
+                            CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);
 
        /* power down host ip */
        setbits_le32(mtk->ippc + IPPC_IP_PW_CTRL1, CTRL1_IP_HOST_PDN);