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From:   Song Yoong Siang <yoong.siang.song@intel.com>
To:     Andrew Lunn <andrew@lunn.ch>,
        Heiner Kallweit <hkallweit1@gmail.com>,
        Russell King <linux@armlinux.org.uk>,
        "David S . Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>
Cc:     netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        Song Yoong Siang <yoong.siang.song@intel.com>
Subject: [PATCH net-next 1/1] net: phy: marvell: Add WAKE_PHY support to WOL event
Date:   Fri, 13 Aug 2021 16:45:08 +0800
Message-Id: <20210813084508.182333-1-yoong.siang.song@intel.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Add Wake-on-PHY feature support by enabling the Link Up Event.

Signed-off-by: Song Yoong Siang <yoong.siang.song@intel.com>
---
 drivers/net/phy/marvell.c | 39 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 36 insertions(+), 3 deletions(-)

diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index 3de93c9f2744..415e2a01c151 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -155,6 +155,7 @@
 
 #define MII_88E1318S_PHY_WOL_CTRL				0x10
 #define MII_88E1318S_PHY_WOL_CTRL_CLEAR_WOL_STATUS		BIT(12)
+#define MII_88E1318S_PHY_WOL_CTRL_LINK_UP_ENABLE		BIT(13)
 #define MII_88E1318S_PHY_WOL_CTRL_MAGIC_PACKET_MATCH_ENABLE	BIT(14)
 
 #define MII_PHY_LED_CTRL	        16
@@ -1746,13 +1747,19 @@ static void m88e1318_get_wol(struct phy_device *phydev,
 {
 	int ret;
 
-	wol->supported = WAKE_MAGIC;
+	wol->supported = WAKE_MAGIC | WAKE_PHY;
 	wol->wolopts = 0;
 
 	ret = phy_read_paged(phydev, MII_MARVELL_WOL_PAGE,
 			     MII_88E1318S_PHY_WOL_CTRL);
-	if (ret >= 0 && ret & MII_88E1318S_PHY_WOL_CTRL_MAGIC_PACKET_MATCH_ENABLE)
+	if (ret < 0)
+		return;
+
+	if (ret & MII_88E1318S_PHY_WOL_CTRL_MAGIC_PACKET_MATCH_ENABLE)
 		wol->wolopts |= WAKE_MAGIC;
+
+	if (ret & MII_88E1318S_PHY_WOL_CTRL_LINK_UP_ENABLE)
+		wol->wolopts |= WAKE_PHY;
 }
 
 static int m88e1318_set_wol(struct phy_device *phydev,
@@ -1764,7 +1771,7 @@ static int m88e1318_set_wol(struct phy_device *phydev,
 	if (oldpage < 0)
 		goto error;
 
-	if (wol->wolopts & WAKE_MAGIC) {
+	if (wol->wolopts & (WAKE_MAGIC | WAKE_PHY)) {
 		/* Explicitly switch to page 0x00, just to be sure */
 		err = marvell_write_page(phydev, MII_MARVELL_COPPER_PAGE);
 		if (err < 0)
@@ -1796,7 +1803,9 @@ static int m88e1318_set_wol(struct phy_device *phydev,
 				   MII_88E1318S_PHY_LED_TCR_INT_ACTIVE_LOW);
 		if (err < 0)
 			goto error;
+	}
 
+	if (wol->wolopts & WAKE_MAGIC) {
 		err = marvell_write_page(phydev, MII_MARVELL_WOL_PAGE);
 		if (err < 0)
 			goto error;
@@ -1837,6 +1846,30 @@ static int m88e1318_set_wol(struct phy_device *phydev,
 			goto error;
 	}
 
+	if (wol->wolopts & WAKE_PHY) {
+		err = marvell_write_page(phydev, MII_MARVELL_WOL_PAGE);
+		if (err < 0)
+			goto error;
+
+		/* Clear WOL status and enable link up event */
+		err = __phy_modify(phydev, MII_88E1318S_PHY_WOL_CTRL, 0,
+				   MII_88E1318S_PHY_WOL_CTRL_CLEAR_WOL_STATUS |
+				   MII_88E1318S_PHY_WOL_CTRL_LINK_UP_ENABLE);
+		if (err < 0)
+			goto error;
+	} else {
+		err = marvell_write_page(phydev, MII_MARVELL_WOL_PAGE);
+		if (err < 0)
+			goto error;
+
+		/* Clear WOL status and disable link up event */
+		err = __phy_modify(phydev, MII_88E1318S_PHY_WOL_CTRL,
+				   MII_88E1318S_PHY_WOL_CTRL_LINK_UP_ENABLE,
+				   MII_88E1318S_PHY_WOL_CTRL_CLEAR_WOL_STATUS);
+		if (err < 0)
+			goto error;
+	}
+
 error:
 	return phy_restore_page(phydev, oldpage, err);
 }
-- 
2.25.1