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Date:   Thu, 23 Jun 2022 18:28:49 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        netdev@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        David Wu <david.wu@...k-chips.com>, kernel@...labora.com,
        Sebastian Reichel <sebastian.reichel@...labora.com>
Subject: [PATCH 2/3] net: ethernet: stmmac: dwmac-rk: Add gmac support for rk3588

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

Add constants and callback functions for the dwmac on RK3588 soc.
As can be seen, the base structure is the same, only registers
and the bits in them moved slightly.

Signed-off-by: David Wu <david.wu@...k-chips.com>
[rebase, squash fixes]
Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-rk.c    | 153 ++++++++++++++++++
 1 file changed, 153 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 56ccd4fbd6c0..f130736b3692 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -32,6 +32,8 @@ struct rk_gmac_ops {
 	void (*set_to_rmii)(struct rk_priv_data *bsp_priv);
 	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 (*set_clock_selection)(struct rk_priv_data *bsp_priv, bool input,
+				    bool enable);
 	void (*integrated_phy_powerup)(struct rk_priv_data *bsp_priv);
 	bool regs_valid;
 	u32 regs[];
@@ -66,6 +68,7 @@ struct rk_priv_data {
 	int rx_delay;
 
 	struct regmap *grf;
+	struct regmap *php_grf;
 };
 
 #define HIWORD_UPDATE(val, mask, shift) \
@@ -1099,6 +1102,145 @@ static const struct rk_gmac_ops rk3568_ops = {
 	},
 };
 
+/* sys_grf */
+#define RK3588_GRF_GMAC_CON7			0X031c
+#define RK3588_GRF_GMAC_CON8			0X0320
+#define RK3588_GRF_GMAC_CON9			0X0324
+
+#define RK3588_GMAC_RXCLK_DLY_ENABLE(id)	GRF_BIT(2 * (id) + 3)
+#define RK3588_GMAC_RXCLK_DLY_DISABLE(id)	GRF_CLR_BIT(2 * (id) + 3)
+#define RK3588_GMAC_TXCLK_DLY_ENABLE(id)	GRF_BIT(2 * (id) + 2)
+#define RK3588_GMAC_TXCLK_DLY_DISABLE(id)	GRF_CLR_BIT(2 * (id) + 2)
+
+#define RK3588_GMAC_CLK_RX_DL_CFG(val)		HIWORD_UPDATE(val, 0xFF, 8)
+#define RK3588_GMAC_CLK_TX_DL_CFG(val)		HIWORD_UPDATE(val, 0xFF, 0)
+
+/* php_grf */
+#define RK3588_GRF_GMAC_CON0			0X0008
+#define RK3588_GRF_CLK_CON1			0X0070
+
+#define RK3588_GMAC_PHY_INTF_SEL_RGMII(id)	\
+	(GRF_BIT(3 + (id) * 6) | GRF_CLR_BIT(4 + (id) * 6) | GRF_CLR_BIT(5 + (id) * 6))
+#define RK3588_GMAC_PHY_INTF_SEL_RMII(id)	\
+	(GRF_CLR_BIT(3 + (id) * 6) | GRF_CLR_BIT(4 + (id) * 6) | GRF_BIT(5 + (id) * 6))
+
+#define RK3588_GMAC_CLK_RMII_MODE(id)		GRF_BIT(5 * (id))
+#define RK3588_GMAC_CLK_RGMII_MODE(id)		GRF_CLR_BIT(5 * (id))
+
+#define RK3588_GMAC_CLK_SELET_CRU(id)		GRF_BIT(5 * (id) + 4)
+#define RK3588_GMAC_CLK_SELET_IO(id)		GRF_CLR_BIT(5 * (id) + 4)
+
+#define RK3588_GMA_CLK_RMII_DIV2(id)		GRF_BIT(5 * (id) + 2)
+#define RK3588_GMA_CLK_RMII_DIV20(id)		GRF_CLR_BIT(5 * (id) + 2)
+
+#define RK3588_GMAC_CLK_RGMII_DIV1(id)		\
+			(GRF_CLR_BIT(5 * (id) + 2) | GRF_CLR_BIT(5 * (id) + 3))
+#define RK3588_GMAC_CLK_RGMII_DIV5(id)		\
+			(GRF_BIT(5 * (id) + 2) | GRF_BIT(5 * (id) + 3))
+#define RK3588_GMAC_CLK_RGMII_DIV50(id)		\
+			(GRF_CLR_BIT(5 * (id) + 2) | GRF_BIT(5 * (id) + 3))
+
+#define RK3588_GMAC_CLK_RMII_GATE(id)		GRF_BIT(5 * (id) + 1)
+#define RK3588_GMAC_CLK_RMII_NOGATE(id)		GRF_CLR_BIT(5 * (id) + 1)
+
+static void rk3588_set_to_rgmii(struct rk_priv_data *bsp_priv,
+				int tx_delay, int rx_delay)
+{
+	struct device *dev = &bsp_priv->pdev->dev;
+	u32 offset_con, id = bsp_priv->id;
+
+	if (IS_ERR(bsp_priv->grf) || IS_ERR(bsp_priv->php_grf)) {
+		dev_err(dev, "Missing rockchip,grf or rockchip,php_grf property\n");
+		return;
+	}
+
+	offset_con = bsp_priv->id == 1 ? RK3588_GRF_GMAC_CON9 :
+					 RK3588_GRF_GMAC_CON8;
+
+	regmap_write(bsp_priv->php_grf, RK3588_GRF_GMAC_CON0,
+		     RK3588_GMAC_PHY_INTF_SEL_RGMII(id));
+
+	regmap_write(bsp_priv->php_grf, RK3588_GRF_CLK_CON1,
+		     RK3588_GMAC_CLK_RGMII_MODE(id));
+
+	regmap_write(bsp_priv->grf, RK3588_GRF_GMAC_CON7,
+		     DELAY_ENABLE_BY_ID(RK3588, tx_delay, rx_delay, id));
+
+	regmap_write(bsp_priv->grf, offset_con,
+		     DELAY_VALUE(RK3588, tx_delay, rx_delay));
+}
+
+static void rk3588_set_to_rmii(struct rk_priv_data *bsp_priv)
+{
+	struct device *dev = &bsp_priv->pdev->dev;
+
+	if (IS_ERR(bsp_priv->php_grf)) {
+		dev_err(dev, "%s: Missing rockchip,php_grf property\n", __func__);
+		return;
+	}
+
+	regmap_write(bsp_priv->php_grf, RK3588_GRF_GMAC_CON0,
+		     RK3588_GMAC_PHY_INTF_SEL_RMII(bsp_priv->id));
+
+	regmap_write(bsp_priv->php_grf, RK3588_GRF_CLK_CON1,
+		     RK3588_GMAC_CLK_RMII_MODE(bsp_priv->id));
+}
+
+static void rk3588_set_gmac_speed(struct rk_priv_data *bsp_priv, int speed)
+{
+	struct device *dev = &bsp_priv->pdev->dev;
+	unsigned int val = 0, id = bsp_priv->id;
+
+	switch (speed) {
+	case 10:
+		if (bsp_priv->phy_iface == PHY_INTERFACE_MODE_RMII)
+			val = RK3588_GMA_CLK_RMII_DIV20(id);
+		else
+			val = RK3588_GMAC_CLK_RGMII_DIV50(id);
+		break;
+	case 100:
+		if (bsp_priv->phy_iface == PHY_INTERFACE_MODE_RMII)
+			val = RK3588_GMA_CLK_RMII_DIV2(id);
+		else
+			val = RK3588_GMAC_CLK_RGMII_DIV5(id);
+		break;
+	case 1000:
+		if (bsp_priv->phy_iface != PHY_INTERFACE_MODE_RMII)
+			val = RK3588_GMAC_CLK_RGMII_DIV1(id);
+		else
+			goto err;
+		break;
+	default:
+		goto err;
+	}
+
+	regmap_write(bsp_priv->php_grf, RK3588_GRF_CLK_CON1, val);
+
+	return;
+err:
+	dev_err(dev, "unknown speed value for GMAC speed=%d", speed);
+}
+
+static void rk3588_set_clock_selection(struct rk_priv_data *bsp_priv, bool input,
+				       bool enable)
+{
+	unsigned int val = input ? RK3588_GMAC_CLK_SELET_IO(bsp_priv->id) :
+				   RK3588_GMAC_CLK_SELET_CRU(bsp_priv->id);
+
+	val |= enable ? RK3588_GMAC_CLK_RMII_NOGATE(bsp_priv->id) :
+			RK3588_GMAC_CLK_RMII_GATE(bsp_priv->id);
+
+	regmap_write(bsp_priv->php_grf, RK3588_GRF_CLK_CON1, val);
+}
+
+static const struct rk_gmac_ops rk3588_ops = {
+	.set_to_rgmii = rk3588_set_to_rgmii,
+	.set_to_rmii = rk3588_set_to_rmii,
+	.set_rgmii_speed = rk3588_set_gmac_speed,
+	.set_rmii_speed = rk3588_set_gmac_speed,
+	.set_clock_selection = rk3588_set_clock_selection,
+};
+
 #define RV1108_GRF_GMAC_CON0		0X0900
 
 /* RV1108_GRF_GMAC_CON0 */
@@ -1302,6 +1444,10 @@ static int gmac_clk_enable(struct rk_priv_data *bsp_priv, bool enable)
 			if (!IS_ERR(bsp_priv->clk_mac_speed))
 				clk_prepare_enable(bsp_priv->clk_mac_speed);
 
+			if (bsp_priv->ops && bsp_priv->ops->set_clock_selection)
+				bsp_priv->ops->set_clock_selection(bsp_priv,
+					       bsp_priv->clock_input, true);
+
 			/**
 			 * if (!IS_ERR(bsp_priv->clk_mac))
 			 *	clk_prepare_enable(bsp_priv->clk_mac);
@@ -1328,6 +1474,10 @@ static int gmac_clk_enable(struct rk_priv_data *bsp_priv, bool enable)
 			clk_disable_unprepare(bsp_priv->mac_clk_tx);
 
 			clk_disable_unprepare(bsp_priv->clk_mac_speed);
+
+			if (bsp_priv->ops && bsp_priv->ops->set_clock_selection)
+				bsp_priv->ops->set_clock_selection(bsp_priv,
+					      bsp_priv->clock_input, false);
 			/**
 			 * if (!IS_ERR(bsp_priv->clk_mac))
 			 *	clk_disable_unprepare(bsp_priv->clk_mac);
@@ -1442,6 +1592,8 @@ static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev,
 
 	bsp_priv->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
 							"rockchip,grf");
+	bsp_priv->php_grf = syscon_regmap_lookup_by_phandle(dev->of_node,
+							    "rockchip,php_grf");
 
 	if (plat->phy_node) {
 		bsp_priv->integrated_phy = of_property_read_bool(plat->phy_node,
@@ -1678,6 +1830,7 @@ static const struct of_device_id rk_gmac_dwmac_match[] = {
 	{ .compatible = "rockchip,rk3368-gmac", .data = &rk3368_ops },
 	{ .compatible = "rockchip,rk3399-gmac", .data = &rk3399_ops },
 	{ .compatible = "rockchip,rk3568-gmac", .data = &rk3568_ops },
+	{ .compatible = "rockchip,rk3588-gmac", .data = &rk3588_ops },
 	{ .compatible = "rockchip,rv1108-gmac", .data = &rv1108_ops },
 	{ }
 };
-- 
2.35.1

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