netdev - [PATCH 1/3] net: stmmac: change GMAC control register for SGMII

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Date:	Fri, 23 Nov 2012 18:04:11 +0900
From:	Byungho An <bh74.an@...sung.com>
To:	davem@...emloft.net, peppe.cavallaro@...com,
	jeffrey.t.kirsher@...el.com
Cc:	netdev@...r.kernel.org, kgene.kim@...sung.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] net: stmmac: change GMAC control register for SGMII


This patch changes GMAC control register (TC(Transmit
Configuration) and PS(Port Selection) bit for SGMII.
In case of SGMII, TC bit is '1' and PS bit is 0.

Signed-off-by: Byungho An <bh74.an@...sung.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index c6cdbc4..a719c87 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1037,6 +1037,7 @@ static int stmmac_open(struct net_device *dev)
 {
 	struct stmmac_priv *priv = netdev_priv(dev);
 	int ret;
+	u32 value;
 
 #ifdef CONFIG_STMMAC_TIMER
 	priv->tm = kzalloc(sizeof(struct stmmac_timer *), GFP_KERNEL);
@@ -1088,6 +1089,15 @@ static int stmmac_open(struct net_device *dev)
 	/* Initialize the MAC Core */
 	priv->hw->mac->core_init(priv->ioaddr);
 
+	if (priv->phydev->interface == PHY_INTERFACE_MODE_SGMII) {
+		value = readl(priv->ioaddr);
+		/* GMAC_CONTROL_TC : transmit config in RGMII/SGMII */
+		value |= 0x1000000;
+		/* GMAC_CONTROL_PS : Port Selection for GMII */
+		value &= ~(0x8000);
+		writel(value, priv->ioaddr);
+	}
+
 	/* Request the IRQ lines */
 	ret = request_irq(dev->irq, stmmac_interrupt,
 			 IRQF_SHARED, dev->name, dev);
-- 
1.7.9.5

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