linux-kernel - [PATCH v2 07/13] usb: xhci-mtk: add support ip-sleep wakeup for mT8192

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Message-ID: <1616482975-17841-7-git-send-email-chunfeng.yun@mediatek.com>
Date:   Tue, 23 Mar 2021 15:02:49 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mathias Nyman <mathias.nyman@...el.com>
CC:     Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Sergei Shtylyov <sergei.shtylyov@...il.com>,
        Eddie Hung <eddie.hung@...iatek.com>,
        "Nicolas Boichat" <drinkcat@...omium.org>
Subject: [PATCH v2 07/13] 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@...iatek.com>
---
v2:
   1. fix typo suggested by Sergei
   2. modify revision format
---
 drivers/usb/host/xhci-mtk.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index ef2c74281ab4..24342112cd1d 100644
--- 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;
-- 
2.18.0