net: mvpp2: Add GoP and NetC support for port 0 (SFI)

This patch adds the GoP (Group of Ports) and NetC (Net Complex) setup to
the Marvell mvpp2 ethernet driver for the missing port 0. This code is
mostly copied from the Marvell U-Boot version and was written by Stefan
Chulski. Please note that only SFI support have been added, as this
is the only interface that this code has been tested with. XAUI and
RXAUI support might follow at a later stage.
Signed-off-by: NStefan Roese <sr@denx.de>
Cc: Stefan Chulski <stefanc@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Nadav Haklai <nadavh@marvell.com>
Acked-by: NJoe Hershberger <joe.hershberger@ni.com>

drivers/net/mvpp2.c

@@ -3225,6 +3225,130 @@ static int gop_gpcs_reset(struct mvpp2_port *port, int reset)
 	return 0;
 }
 
+/* Set the internal mux's to the required PCS in the PI */
+static int gop_xpcs_mode(struct mvpp2_port *port, int num_of_lanes)
+{
+	u32 val;
+	int lane;
+
+	switch (num_of_lanes) {
+	case 1:
+		lane = 0;
+		break;
+	case 2:
+		lane = 1;
+		break;
+	case 4:
+		lane = 2;
+		break;
+	default:
+		return -1;
+	}
+
+	/* configure XG MAC mode */
+	val = readl(port->priv->xpcs_base + MVPP22_XPCS_GLOBAL_CFG_0_REG);
+	val &= ~MVPP22_XPCS_PCSMODE_OFFS;
+	val &= ~MVPP22_XPCS_LANEACTIVE_MASK;
+	val |= (2 * lane) << MVPP22_XPCS_LANEACTIVE_OFFS;
+	writel(val, port->priv->xpcs_base + MVPP22_XPCS_GLOBAL_CFG_0_REG);
+
+	return 0;
+}
+
+static int gop_mpcs_mode(struct mvpp2_port *port)
+{
+	u32 val;
+
+	/* configure PCS40G COMMON CONTROL */
+	val = readl(port->priv->mpcs_base + PCS40G_COMMON_CONTROL);
+	val &= ~FORWARD_ERROR_CORRECTION_MASK;
+	writel(val, port->priv->mpcs_base + PCS40G_COMMON_CONTROL);
+
+	/* configure PCS CLOCK RESET */
+	val = readl(port->priv->mpcs_base + PCS_CLOCK_RESET);
+	val &= ~CLK_DIVISION_RATIO_MASK;
+	val |= 1 << CLK_DIVISION_RATIO_OFFS;
+	writel(val, port->priv->mpcs_base + PCS_CLOCK_RESET);
+
+	val &= ~CLK_DIV_PHASE_SET_MASK;
+	val |= MAC_CLK_RESET_MASK;
+	val |= RX_SD_CLK_RESET_MASK;
+	val |= TX_SD_CLK_RESET_MASK;
+	writel(val, port->priv->mpcs_base + PCS_CLOCK_RESET);
+
+	return 0;
+}
+
+/* Set the internal mux's to the required MAC in the GOP */
+static int gop_xlg_mac_mode_cfg(struct mvpp2_port *port, int num_of_act_lanes)
+{
+	u32 val;
+
+	/* configure 10G MAC mode */
+	val = readl(port->base + MVPP22_XLG_CTRL0_REG);
+	val |= MVPP22_XLG_RX_FC_EN;
+	writel(val, port->base + MVPP22_XLG_CTRL0_REG);
+
+	val = readl(port->base + MVPP22_XLG_CTRL3_REG);
+	val &= ~MVPP22_XLG_CTRL3_MACMODESELECT_MASK;
+	val |= MVPP22_XLG_CTRL3_MACMODESELECT_10GMAC;
+	writel(val, port->base + MVPP22_XLG_CTRL3_REG);
+
+	/* read - modify - write */
+	val = readl(port->base + MVPP22_XLG_CTRL4_REG);
+	val &= ~MVPP22_XLG_MODE_DMA_1G;
+	val |= MVPP22_XLG_FORWARD_PFC_EN;
+	val |= MVPP22_XLG_FORWARD_802_3X_FC_EN;
+	val &= ~MVPP22_XLG_EN_IDLE_CHECK_FOR_LINK;
+	writel(val, port->base + MVPP22_XLG_CTRL4_REG);
+
+	/* Jumbo frame support: 0x1400 * 2 = 0x2800 bytes */
+	val = readl(port->base + MVPP22_XLG_CTRL1_REG);
+	val &= ~MVPP22_XLG_MAX_RX_SIZE_MASK;
+	val |= 0x1400 << MVPP22_XLG_MAX_RX_SIZE_OFFS;
+	writel(val, port->base + MVPP22_XLG_CTRL1_REG);
+
+	/* unmask link change interrupt */
+	val = readl(port->base + MVPP22_XLG_INTERRUPT_MASK_REG);
+	val |= MVPP22_XLG_INTERRUPT_LINK_CHANGE;
+	val |= 1; /* unmask summary bit */
+	writel(val, port->base + MVPP22_XLG_INTERRUPT_MASK_REG);
+
+	return 0;
+}
+
+/* Set PCS to reset or exit from reset */
+static int gop_xpcs_reset(struct mvpp2_port *port, int reset)
+{
+	u32 val;
+
+	/* read - modify - write */
+	val = readl(port->priv->xpcs_base + MVPP22_XPCS_GLOBAL_CFG_0_REG);
+	if (reset)
+		val &= ~MVPP22_XPCS_PCSRESET;
+	else
+		val |= MVPP22_XPCS_PCSRESET;
+	writel(val, port->priv->xpcs_base + MVPP22_XPCS_GLOBAL_CFG_0_REG);
+
+	return 0;
+}
+
+/* Set the MAC to reset or exit from reset */
+static int gop_xlg_mac_reset(struct mvpp2_port *port, int reset)
+{
+	u32 val;
+
+	/* read - modify - write */
+	val = readl(port->base + MVPP22_XLG_CTRL0_REG);
+	if (reset)
+		val &= ~MVPP22_XLG_MAC_RESETN;
+	else
+		val |= MVPP22_XLG_MAC_RESETN;
+	writel(val, port->base + MVPP22_XLG_CTRL0_REG);
+
+	return 0;
+}
+
 /*
  * gop_port_init
  *
@@ -3236,6 +3360,7 @@ static int gop_gpcs_reset(struct mvpp2_port *port, int reset)
 static int gop_port_init(struct mvpp2_port *port)
 {
 	int mac_num = port->gop_id;
+	int num_of_act_lanes;
 
 	if (mac_num >= MVPP22_GOP_MAC_NUM) {
 		netdev_err(NULL, "%s: illegal port number %d", __func__,
@@ -3276,6 +3401,22 @@ static int gop_port_init(struct mvpp2_port *port)
 		gop_gmac_reset(port, 0);
 		break;
 
+	case PHY_INTERFACE_MODE_SFI:
+		num_of_act_lanes = 2;
+		mac_num = 0;
+		/* configure PCS */
+		gop_xpcs_mode(port, num_of_act_lanes);
+		gop_mpcs_mode(port);
+		/* configure MAC */
+		gop_xlg_mac_mode_cfg(port, num_of_act_lanes);
+
+		/* pcs unreset */
+		gop_xpcs_reset(port, 0);
+
+		/* mac unreset */
+		gop_xlg_mac_reset(port, 0);
+		break;
+
 	default:
 		netdev_err(NULL, "%s: Requested port mode (%d) not supported\n",
 			   __func__, port->phy_interface);
@@ -3285,6 +3426,22 @@ static int gop_port_init(struct mvpp2_port *port)
 	return 0;
 }
 
+static void gop_xlg_mac_port_enable(struct mvpp2_port *port, int enable)
+{
+	u32 val;
+
+	val = readl(port->base + MVPP22_XLG_CTRL0_REG);
+	if (enable) {
+		/* Enable port and MIB counters update */
+		val |= MVPP22_XLG_PORT_EN;
+		val &= ~MVPP22_XLG_MIBCNT_DIS;
+	} else {
+		/* Disable port */
+		val &= ~MVPP22_XLG_PORT_EN;
+	}
+	writel(val, port->base + MVPP22_XLG_CTRL0_REG);
+}
+
 static void gop_port_enable(struct mvpp2_port *port, int enable)
 {
 	switch (port->phy_interface) {
@@ -3297,6 +3454,10 @@ static void gop_port_enable(struct mvpp2_port *port, int enable)
 			mvpp2_port_disable(port);
 		break;
 
+	case PHY_INTERFACE_MODE_SFI:
+		gop_xlg_mac_port_enable(port, enable);
+
+		break;
 	default:
 		netdev_err(NULL, "%s: Wrong port mode (%d)\n", __func__,
 			   port->phy_interface);