[PATCH v2 06/32] net: mediatek: use a struct to cover variations of all SoCs

[Weijie Gao]

Using a single soc id to control different initialization and TX/RX flow
for all SoCs is not extensible if more hardware variations are added in
the future.

This patch introduces a struct to replace the original mtk_soc to allow
the driver be able handle newer hardwares.

Reviewed-by: Simon Glass <sjg at chromium.org>
Signed-off-by: Weijie Gao <weijie.gao at mediatek.com>
---
v2c changes:
  Add description for new struct
---
 drivers/net/mtk_eth.c | 56 ++++++++++++++++++++++++++++++-------------
 drivers/net/mtk_eth.h | 25 ++++++++++++++++++-
 2 files changed, 64 insertions(+), 17 deletions(-)

diff --git a/drivers/net/mtk_eth.c b/drivers/net/mtk_eth.c
index 4fe7ee0d36..ce4aa6e065 100644
--- a/drivers/net/mtk_eth.c
+++ b/drivers/net/mtk_eth.c
@@ -142,11 +142,15 @@ enum mtk_switch {
 	SW_MT7531
 };
 
-enum mtk_soc {
-	SOC_MT7623,
-	SOC_MT7629,
-	SOC_MT7622,
-	SOC_MT7621
+/* struct mtk_soc_data -	This is the structure holding all differences
+ *				among various plaforms
+ * @caps			Flags shown the extra capability for the SoC
+ * @ana_rgc3:			The offset for register ANA_RGC3 related to
+ *				sgmiisys syscon
+ */
+struct mtk_soc_data {
+	u32 caps;
+	u32 ana_rgc3;
 };
 
 struct mtk_eth_priv {
@@ -171,7 +175,7 @@ struct mtk_eth_priv {
 	int (*mmd_write)(struct mtk_eth_priv *priv, u8 addr, u8 devad, u16 reg,
 			 u16 val);
 
-	enum mtk_soc soc;
+	const struct mtk_soc_data *soc;
 	int gmac_id;
 	int force_mode;
 	int speed;
@@ -679,7 +683,7 @@ static int mt7530_setup(struct mtk_eth_priv *priv)
 	u32 val, txdrv;
 	int i;
 
-	if (priv->soc != SOC_MT7621) {
+	if (!MTK_HAS_CAPS(priv->soc->caps, MTK_TRGMII_MT7621_CLK)) {
 		/* Select 250MHz clk for RGMII mode */
 		mtk_ethsys_rmw(priv, ETHSYS_CLKCFG0_REG,
 			       ETHSYS_TRGMII_CLK_SEL362_5, 0);
@@ -1108,9 +1112,8 @@ static int mtk_phy_probe(struct udevice *dev)
 static void mtk_sgmii_init(struct mtk_eth_priv *priv)
 {
 	/* Set SGMII GEN2 speed(2.5G) */
-	clrsetbits_le32(priv->sgmii_base + ((priv->soc == SOC_MT7622) ?
-			SGMSYS_GEN2_SPEED : SGMSYS_GEN2_SPEED_V2),
-			SGMSYS_SPEED_2500, SGMSYS_SPEED_2500);
+	setbits_le32(priv->sgmii_base + priv->soc->ana_rgc3,
+		     SGMSYS_SPEED_2500);
 
 	/* Disable SGMII AN */
 	clrsetbits_le32(priv->sgmii_base + SGMSYS_PCS_CONTROL_1,
@@ -1182,7 +1185,8 @@ static void mtk_mac_init(struct mtk_eth_priv *priv)
 		mtk_gmac_write(priv, GMAC_PORT_MCR(priv->gmac_id), mcr);
 	}
 
-	if (priv->soc == SOC_MT7623) {
+	if (MTK_HAS_CAPS(priv->soc->caps, MTK_GMAC1_TRGMII) &&
+	    !MTK_HAS_CAPS(priv->soc->caps, MTK_TRGMII_MT7621_CLK)) {
 		/* Lower Tx Driving for TRGMII path */
 		for (i = 0 ; i < NUM_TRGMII_CTRL; i++)
 			mtk_gmac_write(priv, GMAC_TRGMII_TD_ODT(i),
@@ -1431,7 +1435,11 @@ static int mtk_eth_of_to_plat(struct udevice *dev)
 	ofnode subnode;
 	int ret;
 
-	priv->soc = dev_get_driver_data(dev);
+	priv->soc = (const struct mtk_soc_data *)dev_get_driver_data(dev);
+	if (!priv->soc) {
+		dev_err(dev, "missing soc compatible data\n");
+		return -EINVAL;
+	}
 
 	pdata->iobase = (phys_addr_t)dev_remap_addr(dev);
 
@@ -1544,11 +1552,27 @@ static int mtk_eth_of_to_plat(struct udevice *dev)
 	return 0;
 }
 
+static const struct mtk_soc_data mt7629_data = {
+	.ana_rgc3 = 0x128,
+};
+
+static const struct mtk_soc_data mt7623_data = {
+	.caps = MT7623_CAPS,
+};
+
+static const struct mtk_soc_data mt7622_data = {
+	.ana_rgc3 = 0x2028,
+};
+
+static const struct mtk_soc_data mt7621_data = {
+	.caps = MT7621_CAPS,
+};
+
 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 },
+	{ .compatible = "mediatek,mt7629-eth", .data = (ulong)&mt7629_data },
+	{ .compatible = "mediatek,mt7623-eth", .data = (ulong)&mt7623_data },
+	{ .compatible = "mediatek,mt7622-eth", .data = (ulong)&mt7622_data },
+	{ .compatible = "mediatek,mt7621-eth", .data = (ulong)&mt7621_data },
 	{}
 };
 
diff --git a/drivers/net/mtk_eth.h b/drivers/net/mtk_eth.h
index 057ecfaabf..15c2030617 100644
--- a/drivers/net/mtk_eth.h
+++ b/drivers/net/mtk_eth.h
@@ -9,8 +9,31 @@
 #ifndef _MTK_ETH_H_
 #define _MTK_ETH_H_
 
-/* Frame Engine Register Bases */
 #include <linux/bitops.h>
+
+enum mkt_eth_capabilities {
+	MTK_TRGMII_BIT,
+	MTK_TRGMII_MT7621_CLK_BIT,
+
+	/* PATH BITS */
+	MTK_ETH_PATH_GMAC1_TRGMII_BIT,
+};
+
+#define MTK_TRGMII			BIT(MTK_TRGMII_BIT)
+#define MTK_TRGMII_MT7621_CLK		BIT(MTK_TRGMII_MT7621_CLK_BIT)
+
+/* Supported path present on SoCs */
+#define MTK_ETH_PATH_GMAC1_TRGMII	BIT(MTK_ETH_PATH_GMAC1_TRGMII_BIT)
+
+#define MTK_GMAC1_TRGMII	(MTK_ETH_PATH_GMAC1_TRGMII | MTK_TRGMII)
+
+#define MTK_HAS_CAPS(caps, _x)		(((caps) & (_x)) == (_x))
+
+#define MT7621_CAPS  (MTK_GMAC1_TRGMII | MTK_TRGMII_MT7621_CLK)
+
+#define MT7623_CAPS  (MTK_GMAC1_TRGMII)
+
+/* Frame Engine Register Bases */
 #define PDMA_BASE			0x0800
 #define GDMA1_BASE			0x0500
 #define GDMA2_BASE			0x1500
-- 
2.17.1