[PATCH 13/14] net: mediatek: add support for MediaTek MT7621 SoC

[Weijie Gao]

This patch adds GMAC support for MediaTek MT7621 SoC.
MT7621 has the same GMAC/Switch configuration as MT7623.

Signed-off-by: Weijie Gao <weijie.gao at mediatek.com>
---
 drivers/net/mtk_eth.c | 27 +++++++++++++++++++++------
 drivers/net/mtk_eth.h |  8 ++++++++
 2 files changed, 29 insertions(+), 6 deletions(-)

diff --git a/drivers/net/mtk_eth.c b/drivers/net/mtk_eth.c
index 26f02847a2..3b42c99c2a 100644
--- a/drivers/net/mtk_eth.c
+++ b/drivers/net/mtk_eth.c
@@ -145,7 +145,8 @@ enum mtk_switch {
 enum mtk_soc {
 	SOC_MT7623,
 	SOC_MT7629,
-	SOC_MT7622
+	SOC_MT7622,
+	SOC_MT7621
 };
 
 struct mtk_eth_priv {
@@ -669,12 +670,18 @@ static int mt7530_pad_clk_setup(struct mtk_eth_priv *priv, int mode)
 static int mt7530_setup(struct mtk_eth_priv *priv)
 {
 	u16 phy_addr, phy_val;
-	u32 val;
+	u32 val, txdrv;
 	int i;
 
-	/* Select 250MHz clk for RGMII mode */
-	mtk_ethsys_rmw(priv, ETHSYS_CLKCFG0_REG,
-		       ETHSYS_TRGMII_CLK_SEL362_5, 0);
+	if (priv->soc != SOC_MT7621) {
+		/* Select 250MHz clk for RGMII mode */
+		mtk_ethsys_rmw(priv, ETHSYS_CLKCFG0_REG,
+			       ETHSYS_TRGMII_CLK_SEL362_5, 0);
+
+		txdrv = 8;
+	} else {
+		txdrv = 4;
+	}
 
 	/* Modify HWTRAP first to allow direct access to internal PHYs */
 	mt753x_reg_read(priv, HWTRAP_REG, &val);
@@ -732,7 +739,8 @@ static int mt7530_setup(struct mtk_eth_priv *priv)
 	/* Lower Tx Driving for TRGMII path */
 	for (i = 0 ; i < NUM_TRGMII_CTRL ; i++)
 		mt753x_reg_write(priv, MT7530_TRGMII_TD_ODT(i),
-				 (8 << TD_DM_DRVP_S) | (8 << TD_DM_DRVN_S));
+				 (txdrv << TD_DM_DRVP_S) |
+				 (txdrv << TD_DM_DRVN_S));
 
 	for (i = 0 ; i < NUM_TRGMII_CTRL; i++)
 		mt753x_reg_rmw(priv, MT7530_TRGMII_RD(i), RD_TAP_M, 16);
@@ -1437,6 +1445,12 @@ static int mtk_eth_of_to_plat(struct udevice *dev)
 		return -ENODEV;
 	}
 
+	if (priv->soc == SOC_MT7621) {
+		/* ioremap is needed for MIPS platform */
+		priv->ethsys_base =
+			ioremap_nocache((phys_addr_t)priv->ethsys_base, 0x100);
+	}
+
 	/* Reset controllers */
 	ret = reset_get_by_name(dev, "fe", &priv->rst_fe);
 	if (ret) {
@@ -1542,6 +1556,7 @@ static const struct udevice_id mtk_eth_ids[] = {
 	{ .compatible = "mediatek,mt7629-eth", .data = SOC_MT7629 },
 	{ .compatible = "mediatek,mt7623-eth", .data = SOC_MT7623 },
 	{ .compatible = "mediatek,mt7622-eth", .data = SOC_MT7622 },
+	{ .compatible = "mediatek,mt7621-eth", .data = SOC_MT7621 },
 	{}
 };
 
diff --git a/drivers/net/mtk_eth.h b/drivers/net/mtk_eth.h
index 057ecfaabf..4a8c66c671 100644
--- a/drivers/net/mtk_eth.h
+++ b/drivers/net/mtk_eth.h
@@ -412,4 +412,12 @@
 #define PHY_POWER_SAVING_M		0x300
 #define PHY_POWER_SAVING_TX		0x0
 
+#ifndef CONFIG_SYS_NONCACHED_MEMORY
+/*
+ * noncached_alloc is provided only for ARM. Add a prototype here for other
+ * platforms to suppress compilation warning.
+ */
+phys_addr_t noncached_alloc(size_t size, size_t align);
+#endif
+
 #endif /* _MTK_ETH_H_ */
-- 
2.17.1