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Date:   Tue, 6 Dec 2022 13:52:57 +0100
From:   Piergiorgio Beruto <piergiorgio.beruto@gmail.com>
To:     Andrew Lunn <andrew@lunn.ch>,
        Heiner Kallweit <hkallweit1@gmail.com>,
        Russell King <linux@armlinux.org.uk>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>
Cc:     linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
        Oleksij Rempel <o.rempel@pengutronix.de>
Subject: [PATCH v4 net-next 2/5] drivers/net/phy: add the link modes for the
 10BASE-T1S Ethernet PHY
Message-ID: <9dd727e8bfb3c1e9f0e7c13f101d7c6d040b9651.1670329232.git.piergiorgio.beruto@gmail.com>
References: <cover.1670329232.git.piergiorgio.beruto@gmail.com>
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In-Reply-To: <cover.1670329232.git.piergiorgio.beruto@gmail.com>
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This patch adds the link modes for the IEEE 802.3cg Clause 147 10BASE-T1S
Ethernet PHY. According to the specifications, the 10BASE-T1S supports
Point-To-Point Full-Duplex, Point-To-Point Half-Duplex and/or
Point-To-Multipoint (AKA Multi-Drop) Half-Duplex operations.

Signed-off-by: Piergiorgio Beruto <piergiorgio.beruto@gmail.com>
---
 drivers/net/phy/phy-core.c   |  5 ++++-
 drivers/net/phy/phylink.c    |  6 +++++-
 include/linux/phy.h          | 11 +++++++++++
 include/uapi/linux/ethtool.h |  3 +++
 net/ethtool/common.c         |  8 ++++++++
 5 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/phy-core.c b/drivers/net/phy/phy-core.c
index 5d08c627a516..a64186dc53f8 100644
--- a/drivers/net/phy/phy-core.c
+++ b/drivers/net/phy/phy-core.c
@@ -13,7 +13,7 @@
  */
 const char *phy_speed_to_str(int speed)
 {
-	BUILD_BUG_ON_MSG(__ETHTOOL_LINK_MODE_MASK_NBITS != 99,
+	BUILD_BUG_ON_MSG(__ETHTOOL_LINK_MODE_MASK_NBITS != 102,
 		"Enum ethtool_link_mode_bit_indices and phylib are out of sync. "
 		"If a speed or mode has been added please update phy_speed_to_str "
 		"and the PHY settings array.\n");
@@ -260,6 +260,9 @@ static const struct phy_setting settings[] = {
 	PHY_SETTING(     10, FULL,     10baseT_Full		),
 	PHY_SETTING(     10, HALF,     10baseT_Half		),
 	PHY_SETTING(     10, FULL,     10baseT1L_Full		),
+	PHY_SETTING(     10, FULL,     10baseT1S_Full		),
+	PHY_SETTING(     10, HALF,     10baseT1S_Half		),
+	PHY_SETTING(     10, HALF,     10baseT1S_P2MP_Half	),
 };
 #undef PHY_SETTING
 
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 09cc65c0da93..319790221d7f 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -241,12 +241,16 @@ void phylink_caps_to_linkmodes(unsigned long *linkmodes, unsigned long caps)
 	if (caps & MAC_ASYM_PAUSE)
 		__set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes);
 
-	if (caps & MAC_10HD)
+	if (caps & MAC_10HD) {
 		__set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, linkmodes);
+		__set_bit(ETHTOOL_LINK_MODE_10baseT1S_Half_BIT, linkmodes);
+		__set_bit(ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT, linkmodes);
+	}
 
 	if (caps & MAC_10FD) {
 		__set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, linkmodes);
 		__set_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, linkmodes);
+		__set_bit(ETHTOOL_LINK_MODE_10baseT1S_Full_BIT, linkmodes);
 	}
 
 	if (caps & MAC_100HD) {
diff --git a/include/linux/phy.h b/include/linux/phy.h
index f3ecc9a86e67..49d0488bf480 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1036,6 +1036,17 @@ struct phy_driver {
 	int (*get_sqi)(struct phy_device *dev);
 	/** @get_sqi_max: Get the maximum signal quality indication */
 	int (*get_sqi_max)(struct phy_device *dev);
+
+	/* PLCA RS interface */
+	/** @get_plca_cfg: Return the current PLCA configuration */
+	int (*get_plca_cfg)(struct phy_device *dev,
+			    struct phy_plca_cfg *plca_cfg);
+	/** @set_plca_cfg: Set the PLCA configuration */
+	int (*set_plca_cfg)(struct phy_device *dev,
+			    const struct phy_plca_cfg *plca_cfg);
+	/** @get_plca_status: Return the current PLCA status info */
+	int (*get_plca_status)(struct phy_device *dev,
+			       struct phy_plca_status *plca_st);
 };
 #define to_phy_driver(d) container_of(to_mdio_common_driver(d),		\
 				      struct phy_driver, mdiodrv)
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 58e587ba0450..5f414deacf23 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -1741,6 +1741,9 @@ enum ethtool_link_mode_bit_indices {
 	ETHTOOL_LINK_MODE_800000baseDR8_2_Full_BIT	 = 96,
 	ETHTOOL_LINK_MODE_800000baseSR8_Full_BIT	 = 97,
 	ETHTOOL_LINK_MODE_800000baseVR8_Full_BIT	 = 98,
+	ETHTOOL_LINK_MODE_10baseT1S_Full_BIT		 = 99,
+	ETHTOOL_LINK_MODE_10baseT1S_Half_BIT		 = 100,
+	ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT	 = 101,
 
 	/* must be last entry */
 	__ETHTOOL_LINK_MODE_MASK_NBITS
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index 21cfe8557205..c586db0c5e68 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -208,6 +208,9 @@ const char link_mode_names[][ETH_GSTRING_LEN] = {
 	__DEFINE_LINK_MODE_NAME(800000, DR8_2, Full),
 	__DEFINE_LINK_MODE_NAME(800000, SR8, Full),
 	__DEFINE_LINK_MODE_NAME(800000, VR8, Full),
+	__DEFINE_LINK_MODE_NAME(10, T1S, Full),
+	__DEFINE_LINK_MODE_NAME(10, T1S, Half),
+	__DEFINE_LINK_MODE_NAME(10, T1S_P2MP, Half),
 };
 static_assert(ARRAY_SIZE(link_mode_names) == __ETHTOOL_LINK_MODE_MASK_NBITS);
 
@@ -244,6 +247,8 @@ static_assert(ARRAY_SIZE(link_mode_names) == __ETHTOOL_LINK_MODE_MASK_NBITS);
 #define __LINK_MODE_LANES_X		1
 #define __LINK_MODE_LANES_FX		1
 #define __LINK_MODE_LANES_T1L		1
+#define __LINK_MODE_LANES_T1S		1
+#define __LINK_MODE_LANES_T1S_P2MP	1
 #define __LINK_MODE_LANES_VR8		8
 #define __LINK_MODE_LANES_DR8_2		8
 
@@ -366,6 +371,9 @@ const struct link_mode_info link_mode_params[] = {
 	__DEFINE_LINK_MODE_PARAMS(800000, DR8_2, Full),
 	__DEFINE_LINK_MODE_PARAMS(800000, SR8, Full),
 	__DEFINE_LINK_MODE_PARAMS(800000, VR8, Full),
+	__DEFINE_LINK_MODE_PARAMS(10, T1S, Full),
+	__DEFINE_LINK_MODE_PARAMS(10, T1S, Half),
+	__DEFINE_LINK_MODE_PARAMS(10, T1S_P2MP, Half),
 };
 static_assert(ARRAY_SIZE(link_mode_params) == __ETHTOOL_LINK_MODE_MASK_NBITS);
 
-- 
2.35.1