net/fm: add 2.5G SGMII support

As auto-negotiation is not supported for 2.5G SGMII, we need
to add a new type PHY_INTERFACE_MODE_SGMII_2500 to differentiate
SGMII-1G and SGMII-2.5G with different setting for auto-negotiation.

Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

arch/powerpc/include/asm/fsl_serdes.h

@@ -71,6 +71,22 @@ enum srds_prtcl {
 	INTERLAKEN,
 	QSGMII_SW1_A,		/* Indicates ports on L2 Switch */
 	QSGMII_SW1_B,
+	SGMII_2500_FM1_DTSEC1,
+	SGMII_2500_FM1_DTSEC2,
+	SGMII_2500_FM1_DTSEC3,
+	SGMII_2500_FM1_DTSEC4,
+	SGMII_2500_FM1_DTSEC5,
+	SGMII_2500_FM1_DTSEC6,
+	SGMII_2500_FM1_DTSEC9,
+	SGMII_2500_FM1_DTSEC10,
+	SGMII_2500_FM2_DTSEC1,
+	SGMII_2500_FM2_DTSEC2,
+	SGMII_2500_FM2_DTSEC3,
+	SGMII_2500_FM2_DTSEC4,
+	SGMII_2500_FM2_DTSEC5,
+	SGMII_2500_FM2_DTSEC6,
+	SGMII_2500_FM2_DTSEC9,
+	SGMII_2500_FM2_DTSEC10,
 };
 
 enum srds {

drivers/net/fm/eth.c

@@ -39,9 +39,14 @@ static void dtsec_configure_serdes(struct fm_eth *priv)
 	u32 value;
 	struct mii_dev bus;
 	bus.priv = priv->mac->phyregs;
+	bool sgmii_2500 = (priv->enet_if ==
+			PHY_INTERFACE_MODE_SGMII_2500) ? true : false;
+
+	/* SGMII IF mode + AN enable only for 1G SGMII, not for 2.5G */
+	value = PHY_SGMII_IF_MODE_SGMII;
+	if (!sgmii_2500)
+		value |= PHY_SGMII_IF_MODE_AN;
 
-	/* SGMII IF mode + AN enable */
-	value = PHY_SGMII_IF_MODE_AN | PHY_SGMII_IF_MODE_SGMII;
 	memac_mdio_write(&bus, 0, MDIO_DEVAD_NONE, 0x14, value);
 
 	/* Dev ability according to SGMII specification */
@@ -54,7 +59,9 @@ static void dtsec_configure_serdes(struct fm_eth *priv)
 	memac_mdio_write(&bus, 0, MDIO_DEVAD_NONE, 0x12, 0xd40);
 
 	/* Restart AN */
-	value = PHY_SGMII_CR_DEF_VAL | PHY_SGMII_CR_RESET_AN;
+	value = PHY_SGMII_CR_DEF_VAL;
+	if (!sgmii_2500)
+		value |= PHY_SGMII_CR_RESET_AN;
 	memac_mdio_write(&bus, 0, MDIO_DEVAD_NONE, 0, value);
 #else
 	struct dtsec *regs = priv->mac->base;
@@ -83,7 +90,8 @@ static void dtsec_init_phy(struct eth_device *dev)
 	out_be32(&regs->tbipa, CONFIG_SYS_TBIPA_VALUE);
 #endif
 
-	if (fm_eth->enet_if == PHY_INTERFACE_MODE_SGMII)
+	if (fm_eth->enet_if == PHY_INTERFACE_MODE_SGMII ||
+	    fm_eth->enet_if == PHY_INTERFACE_MODE_SGMII_2500)
 		dtsec_configure_serdes(fm_eth);
 }
 

include/phy.h

@@ -41,6 +41,7 @@ typedef enum {
 	PHY_INTERFACE_MODE_MII,
 	PHY_INTERFACE_MODE_GMII,
 	PHY_INTERFACE_MODE_SGMII,
+	PHY_INTERFACE_MODE_SGMII_2500,
 	PHY_INTERFACE_MODE_QSGMII,
 	PHY_INTERFACE_MODE_TBI,
 	PHY_INTERFACE_MODE_RMII,
@@ -57,6 +58,7 @@ static const char *phy_interface_strings[] = {
 	[PHY_INTERFACE_MODE_MII]		= "mii",
 	[PHY_INTERFACE_MODE_GMII]		= "gmii",
 	[PHY_INTERFACE_MODE_SGMII]		= "sgmii",
+	[PHY_INTERFACE_MODE_SGMII_2500]		= "sgmii-2500",
 	[PHY_INTERFACE_MODE_QSGMII]		= "qsgmii",
 	[PHY_INTERFACE_MODE_TBI]		= "tbi",
 	[PHY_INTERFACE_MODE_RMII]		= "rmii",