usb: xhci-mtk: add support ip-sleep wakeup for mT8192

Add support ip-sleep wakeup for mT8192, it's a specific revision,
and not following IPM rule.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1616482975-17841-7-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index edc79db..a003b3f 100644 (file)
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -70,6 +70,10 @@
 #define WC0_IS_P       BIT(12) /* polarity */
 #define WC0_IS_EN      BIT(6)
 
+/* mt8192 */
+#define WC0_SSUSB0_CDEN                BIT(6)
+#define WC0_IS_SPM_EN          BIT(1)
+
 /* mt2712 etc */
 #define PERI_SSUSB_SPM_CTRL    0x0
 #define SSC_IP_SLEEP_EN        BIT(4)
@@ -79,6 +83,7 @@ enum ssusb_uwk_vers {
        SSUSB_UWK_V1 = 1,
        SSUSB_UWK_V2,
        SSUSB_UWK_V1_1 = 101,   /* specific revision 1.01 */
+       SSUSB_UWK_V1_2,         /* specific revision 1.2 */
 };
 
 static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk)
@@ -313,6 +318,11 @@ static void usb_wakeup_ip_sleep_set(struct xhci_hcd_mtk *mtk, bool enable)
                msk = WC0_IS_EN | WC0_IS_C(0xf) | WC0_IS_P;
                val = enable ? (WC0_IS_EN | WC0_IS_C(0x8)) : 0;
                break;
+       case SSUSB_UWK_V1_2:
+               reg = mtk->uwk_reg_base + PERI_WK_CTRL0;
+               msk = WC0_SSUSB0_CDEN | WC0_IS_SPM_EN;
+               val = enable ? msk : 0;
+               break;
        case SSUSB_UWK_V2:
                reg = mtk->uwk_reg_base + PERI_SSUSB_SPM_CTRL;
                msk = SSC_IP_SLEEP_EN | SSC_SPM_INT_EN;