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From:   Antoine Tenart <antoine.tenart@bootlin.com>
To:     davem@davemloft.net, kishon@ti.com, linux@armlinux.org.uk,
        gregory.clement@bootlin.com, andrew@lunn.ch, jason@lakedaemon.net,
        sebastian.hesselbarth@gmail.com
Cc:     Antoine Tenart <antoine.tenart@bootlin.com>,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        thomas.petazzoni@bootlin.com, maxime.chevallier@bootlin.com,
        miquel.raynal@bootlin.com, nadavh@marvell.com, stefanc@marvell.com,
        ymarkman@marvell.com, mw@semihalf.com,
        linux-arm-kernel@lists.infradead.org
Subject: [PATCH net-next v2 08/13] net: mvpp2: 1000baseX support
Date:   Fri,  4 May 2018 15:56:38 +0200
Message-Id: <20180504135643.23466-9-antoine.tenart@bootlin.com>
In-Reply-To: <20180504135643.23466-1-antoine.tenart@bootlin.com>
References: <20180504135643.23466-1-antoine.tenart@bootlin.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

This patch adds the 1000Base-X PHY mode support in the Marvell PPv2
driver. 1000Base-X is quite close the SGMII and uses nearly the same
code path.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
---
 drivers/net/ethernet/marvell/mvpp2.c | 73 ++++++++++++++++++++--------
 1 file changed, 52 insertions(+), 21 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c
index da00e11dc178..4775ab56075e 100644
--- a/drivers/net/ethernet/marvell/mvpp2.c
+++ b/drivers/net/ethernet/marvell/mvpp2.c
@@ -4869,6 +4869,7 @@ static int mvpp22_gop_init(struct mvpp2_port *port)
 		mvpp22_gop_init_rgmii(port);
 		break;
 	case PHY_INTERFACE_MODE_SGMII:
+	case PHY_INTERFACE_MODE_1000BASEX:
 		mvpp22_gop_init_sgmii(port);
 		break;
 	case PHY_INTERFACE_MODE_10GKR:
@@ -4906,7 +4907,8 @@ static void mvpp22_gop_unmask_irq(struct mvpp2_port *port)
 	u32 val;
 
 	if (phy_interface_mode_is_rgmii(port->phy_interface) ||
-	    port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
+	    port->phy_interface == PHY_INTERFACE_MODE_SGMII ||
+	    port->phy_interface == PHY_INTERFACE_MODE_1000BASEX) {
 		/* Enable the GMAC link status irq for this port */
 		val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK);
 		val |= MVPP22_GMAC_INT_SUM_MASK_LINK_STAT;
@@ -4936,7 +4938,8 @@ static void mvpp22_gop_mask_irq(struct mvpp2_port *port)
 	}
 
 	if (phy_interface_mode_is_rgmii(port->phy_interface) ||
-	    port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
+	    port->phy_interface == PHY_INTERFACE_MODE_SGMII ||
+	    port->phy_interface == PHY_INTERFACE_MODE_1000BASEX) {
 		val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK);
 		val &= ~MVPP22_GMAC_INT_SUM_MASK_LINK_STAT;
 		writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK);
@@ -4948,7 +4951,8 @@ static void mvpp22_gop_setup_irq(struct mvpp2_port *port)
 	u32 val;
 
 	if (phy_interface_mode_is_rgmii(port->phy_interface) ||
-	    port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
+	    port->phy_interface == PHY_INTERFACE_MODE_SGMII ||
+	    port->phy_interface == PHY_INTERFACE_MODE_1000BASEX) {
 		val = readl(port->base + MVPP22_GMAC_INT_MASK);
 		val |= MVPP22_GMAC_INT_MASK_LINK_STAT;
 		writel(val, port->base + MVPP22_GMAC_INT_MASK);
@@ -4973,6 +4977,7 @@ static int mvpp22_comphy_init(struct mvpp2_port *port)
 
 	switch (port->phy_interface) {
 	case PHY_INTERFACE_MODE_SGMII:
+	case PHY_INTERFACE_MODE_1000BASEX:
 		mode = PHY_MODE_SGMII;
 		break;
 	case PHY_INTERFACE_MODE_10GKR:
@@ -5052,7 +5057,8 @@ static void mvpp2_port_loopback_set(struct mvpp2_port *port,
 	else
 		val &= ~MVPP2_GMAC_GMII_LB_EN_MASK;
 
-	if (port->phy_interface == PHY_INTERFACE_MODE_SGMII)
+	if (port->phy_interface == PHY_INTERFACE_MODE_SGMII ||
+	    port->phy_interface == PHY_INTERFACE_MODE_1000BASEX)
 		val |= MVPP2_GMAC_PCS_LB_EN_MASK;
 	else
 		val &= ~MVPP2_GMAC_PCS_LB_EN_MASK;
@@ -6262,7 +6268,8 @@ static irqreturn_t mvpp2_link_status_isr(int irq, void *dev_id)
 				link = true;
 		}
 	} else if (phy_interface_mode_is_rgmii(port->phy_interface) ||
-		   port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
+		   port->phy_interface == PHY_INTERFACE_MODE_SGMII ||
+		   port->phy_interface == PHY_INTERFACE_MODE_1000BASEX) {
 		val = readl(port->base + MVPP22_GMAC_INT_STAT);
 		if (val & MVPP22_GMAC_INT_STAT_LINK) {
 			event = true;
@@ -8029,20 +8036,25 @@ static void mvpp2_phylink_validate(struct net_device *dev,
 	phylink_set(mask, Pause);
 	phylink_set(mask, Asym_Pause);
 
-	phylink_set(mask, 10baseT_Half);
-	phylink_set(mask, 10baseT_Full);
-	phylink_set(mask, 100baseT_Half);
-	phylink_set(mask, 100baseT_Full);
-	phylink_set(mask, 1000baseT_Full);
-	phylink_set(mask, 10000baseT_Full);
-
-	if (state->interface == PHY_INTERFACE_MODE_10GKR) {
+	switch (state->interface) {
+	case PHY_INTERFACE_MODE_10GKR:
 		phylink_set(mask, 10000baseCR_Full);
 		phylink_set(mask, 10000baseSR_Full);
 		phylink_set(mask, 10000baseLR_Full);
 		phylink_set(mask, 10000baseLRM_Full);
 		phylink_set(mask, 10000baseER_Full);
 		phylink_set(mask, 10000baseKR_Full);
+		/* Fall-through */
+	default:
+		phylink_set(mask, 10baseT_Half);
+		phylink_set(mask, 10baseT_Full);
+		phylink_set(mask, 100baseT_Half);
+		phylink_set(mask, 100baseT_Full);
+		phylink_set(mask, 10000baseT_Full);
+		/* Fall-through */
+	case PHY_INTERFACE_MODE_1000BASEX:
+		phylink_set(mask, 1000baseT_Full);
+		phylink_set(mask, 1000baseX_Full);
 	}
 
 	bitmap_and(supported, supported, mask, __ETHTOOL_LINK_MODE_MASK_NBITS);
@@ -8081,12 +8093,18 @@ static void mvpp2_gmac_link_state(struct mvpp2_port *port,
 	state->link = !!(val & MVPP2_GMAC_STATUS0_LINK_UP);
 	state->duplex = !!(val & MVPP2_GMAC_STATUS0_FULL_DUPLEX);
 
-	if (val & MVPP2_GMAC_STATUS0_GMII_SPEED)
+	switch (port->phy_interface) {
+	case PHY_INTERFACE_MODE_1000BASEX:
 		state->speed = SPEED_1000;
-	else if (val & MVPP2_GMAC_STATUS0_MII_SPEED)
-		state->speed = SPEED_100;
-	else
-		state->speed = SPEED_10;
+		break;
+	default:
+		if (val & MVPP2_GMAC_STATUS0_GMII_SPEED)
+			state->speed = SPEED_1000;
+		else if (val & MVPP2_GMAC_STATUS0_MII_SPEED)
+			state->speed = SPEED_100;
+		else
+			state->speed = SPEED_10;
+	}
 
 	state->pause = 0;
 	if (val & MVPP2_GMAC_STATUS0_RX_PAUSE)
@@ -8177,7 +8195,18 @@ static void mvpp2_gmac_config(struct mvpp2_port *port, unsigned int mode,
 	ctrl0 &= ~MVPP2_GMAC_PORT_TYPE_MASK;
 	ctrl2 &= ~(MVPP2_GMAC_PORT_RESET_MASK | MVPP2_GMAC_PCS_ENABLE_MASK);
 
-	an |= MVPP2_GMAC_AN_SPEED_EN | MVPP2_GMAC_FLOW_CTRL_AUTONEG;
+	if (state->interface == PHY_INTERFACE_MODE_1000BASEX) {
+		/* 1000BaseX port cannot negotiate speed nor can it negotiate
+		 * duplex: they are always operating with a fixed speed of
+		 * 1000Mbps in full duplex, so force 1000 speed and full duplex
+		 * here.
+		 */
+		ctrl0 |= MVPP2_GMAC_PORT_TYPE_MASK;
+		an |= MVPP2_GMAC_CONFIG_GMII_SPEED |
+		      MVPP2_GMAC_CONFIG_FULL_DUPLEX;
+	} else {
+		an |= MVPP2_GMAC_AN_SPEED_EN | MVPP2_GMAC_FLOW_CTRL_AUTONEG;
+	}
 
 	if (state->duplex)
 		an |= MVPP2_GMAC_CONFIG_FULL_DUPLEX;
@@ -8186,7 +8215,8 @@ static void mvpp2_gmac_config(struct mvpp2_port *port, unsigned int mode,
 	if (phylink_test(state->advertising, Asym_Pause))
 		an |= MVPP2_GMAC_FC_ADV_ASM_EN;
 
-	if (state->interface == PHY_INTERFACE_MODE_SGMII) {
+	if (state->interface == PHY_INTERFACE_MODE_SGMII ||
+	    state->interface == PHY_INTERFACE_MODE_1000BASEX) {
 		an |= MVPP2_GMAC_IN_BAND_AUTONEG;
 		ctrl2 |= MVPP2_GMAC_INBAND_AN_MASK | MVPP2_GMAC_PCS_ENABLE_MASK;
 
@@ -8248,7 +8278,8 @@ static void mvpp2_mac_config(struct net_device *dev, unsigned int mode,
 	if (state->interface == PHY_INTERFACE_MODE_10GKR)
 		mvpp2_xlg_config(port, mode, state);
 	else if (phy_interface_mode_is_rgmii(state->interface) ||
-		 state->interface == PHY_INTERFACE_MODE_SGMII)
+		 state->interface == PHY_INTERFACE_MODE_SGMII ||
+		 state->interface == PHY_INTERFACE_MODE_1000BASEX)
 		mvpp2_gmac_config(port, mode, state);
 
 	if (port->priv->hw_version == MVPP21 && port->flags & MVPP2_F_LOOPBACK)
-- 
2.17.0