[PATCH v3 net-next 4/4] net: stmmac: Add RK3566/RK3568 SoC support

[Ezequiel Garcia <ezequiel@collabora.com>]

From: David Wu <david.wu@rock-chips.com>

Add constants and callback functions for the dwmac present
on RK3566/RK3568 SoCs.

RK3568 has two MACs, and RK3566 just one, but it's otherwise
the same IP core.

Signed-off-by: David Wu <david.wu@rock-chips.com>
[Ezequiel: Separate rk3566-gmac support]
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-rk.c    | 121 ++++++++++++++++++
 1 file changed, 121 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 791c13d47a35..280ac0129572 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -33,11 +33,13 @@ struct rk_gmac_ops {
 	void (*set_rgmii_speed)(struct rk_priv_data *bsp_priv, int speed);
 	void (*set_rmii_speed)(struct rk_priv_data *bsp_priv, int speed);
 	void (*integrated_phy_powerup)(struct rk_priv_data *bsp_priv);
+	u32 regs[];
 };
 
 struct rk_priv_data {
 	struct platform_device *pdev;
 	phy_interface_t phy_iface;
+	int id;
 	struct regulator *regulator;
 	bool suspended;
 	const struct rk_gmac_ops *ops;
@@ -996,6 +998,107 @@ static const struct rk_gmac_ops rk3399_ops = {
 	.set_rmii_speed = rk3399_set_rmii_speed,
 };
 
+#define RK3568_GRF_GMAC0_CON0		0x0380
+#define RK3568_GRF_GMAC0_CON1		0x0384
+#define RK3568_GRF_GMAC1_CON0		0x0388
+#define RK3568_GRF_GMAC1_CON1		0x038c
+
+/* RK3568_GRF_GMAC0_CON1 && RK3568_GRF_GMAC1_CON1 */
+#define RK3568_GMAC_PHY_INTF_SEL_RGMII	\
+		(GRF_BIT(4) | GRF_CLR_BIT(5) | GRF_CLR_BIT(6))
+#define RK3568_GMAC_PHY_INTF_SEL_RMII	\
+		(GRF_CLR_BIT(4) | GRF_CLR_BIT(5) | GRF_BIT(6))
+#define RK3568_GMAC_FLOW_CTRL			GRF_BIT(3)
+#define RK3568_GMAC_FLOW_CTRL_CLR		GRF_CLR_BIT(3)
+#define RK3568_GMAC_RXCLK_DLY_ENABLE		GRF_BIT(1)
+#define RK3568_GMAC_RXCLK_DLY_DISABLE		GRF_CLR_BIT(1)
+#define RK3568_GMAC_TXCLK_DLY_ENABLE		GRF_BIT(0)
+#define RK3568_GMAC_TXCLK_DLY_DISABLE		GRF_CLR_BIT(0)
+
+/* RK3568_GRF_GMAC0_CON0 && RK3568_GRF_GMAC1_CON0 */
+#define RK3568_GMAC_CLK_RX_DL_CFG(val)	HIWORD_UPDATE(val, 0x7F, 8)
+#define RK3568_GMAC_CLK_TX_DL_CFG(val)	HIWORD_UPDATE(val, 0x7F, 0)
+
+static void rk3568_set_to_rgmii(struct rk_priv_data *bsp_priv,
+				int tx_delay, int rx_delay)
+{
+	struct device *dev = &bsp_priv->pdev->dev;
+	u32 con0, con1;
+
+	if (IS_ERR(bsp_priv->grf)) {
+		dev_err(dev, "Missing rockchip,grf property\n");
+		return;
+	}
+
+	con0 = (bsp_priv->id == 1) ? RK3568_GRF_GMAC1_CON0 :
+				     RK3568_GRF_GMAC0_CON0;
+	con1 = (bsp_priv->id == 1) ? RK3568_GRF_GMAC1_CON1 :
+				     RK3568_GRF_GMAC0_CON1;
+
+	regmap_write(bsp_priv->grf, con0,
+		     RK3568_GMAC_CLK_RX_DL_CFG(rx_delay) |
+		     RK3568_GMAC_CLK_TX_DL_CFG(tx_delay));
+
+	regmap_write(bsp_priv->grf, con1,
+		     RK3568_GMAC_PHY_INTF_SEL_RGMII |
+		     RK3568_GMAC_RXCLK_DLY_ENABLE |
+		     RK3568_GMAC_TXCLK_DLY_ENABLE);
+}
+
+static void rk3568_set_to_rmii(struct rk_priv_data *bsp_priv)
+{
+	struct device *dev = &bsp_priv->pdev->dev;
+	u32 con1;
+
+	if (IS_ERR(bsp_priv->grf)) {
+		dev_err(dev, "%s: Missing rockchip,grf property\n", __func__);
+		return;
+	}
+
+	con1 = (bsp_priv->id == 1) ? RK3568_GRF_GMAC1_CON1 :
+				     RK3568_GRF_GMAC0_CON1;
+	regmap_write(bsp_priv->grf, con1, RK3568_GMAC_PHY_INTF_SEL_RMII);
+}
+
+static void rk3568_set_gmac_speed(struct rk_priv_data *bsp_priv, int speed)
+{
+	struct device *dev = &bsp_priv->pdev->dev;
+	unsigned long rate;
+	int ret;
+
+	switch (speed) {
+	case 10:
+		rate = 2500000;
+		break;
+	case 100:
+		rate = 25000000;
+		break;
+	case 1000:
+		rate = 125000000;
+		break;
+	default:
+		dev_err(dev, "unknown speed value for GMAC speed=%d", speed);
+		return;
+	}
+
+	ret = clk_set_rate(bsp_priv->clk_mac_speed, rate);
+	if (ret)
+		dev_err(dev, "%s: set clk_mac_speed rate %ld failed %d\n",
+			__func__, rate, ret);
+}
+
+static const struct rk_gmac_ops rk3568_ops = {
+	.set_to_rgmii = rk3568_set_to_rgmii,
+	.set_to_rmii = rk3568_set_to_rmii,
+	.set_rgmii_speed = rk3568_set_gmac_speed,
+	.set_rmii_speed = rk3568_set_gmac_speed,
+	.regs = {
+		0xfe2a0000, /* gmac0 */
+		0xfe010000, /* gmac1 */
+		0x0, /* sentinel */
+	},
+};
+
 #define RV1108_GRF_GMAC_CON0		0X0900
 
 /* RV1108_GRF_GMAC_CON0 */
@@ -1264,6 +1367,7 @@ static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev,
 {
 	struct rk_priv_data *bsp_priv;
 	struct device *dev = &pdev->dev;
+	struct resource *res;
 	int ret;
 	const char *strings = NULL;
 	int value;
@@ -1275,6 +1379,22 @@ static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev,
 	of_get_phy_mode(dev->of_node, &bsp_priv->phy_iface);
 	bsp_priv->ops = ops;
 
+	/* Some SoCs have multiple MAC controllers, which need
+	 * to be distinguished.
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (res) {
+		int i = 0;
+
+		while (ops->regs[i]) {
+			if (ops->regs[i] == res->start) {
+				bsp_priv->id = i;
+				break;
+			}
+			i++;
+		}
+	}
+
 	bsp_priv->regulator = devm_regulator_get_optional(dev, "phy");
 	if (IS_ERR(bsp_priv->regulator)) {
 		if (PTR_ERR(bsp_priv->regulator) == -EPROBE_DEFER) {
@@ -1561,6 +1681,7 @@ static const struct of_device_id rk_gmac_dwmac_match[] = {
 	{ .compatible = "rockchip,rk3366-gmac", .data = &rk3366_ops },
 	{ .compatible = "rockchip,rk3368-gmac", .data = &rk3368_ops },
 	{ .compatible = "rockchip,rk3399-gmac", .data = &rk3399_ops },
+	{ .compatible = "rockchip,rk3568-gmac", .data = &rk3568_ops },
 	{ .compatible = "rockchip,rv1108-gmac", .data = &rv1108_ops },
 	{ }
 };
-- 
2.30.0