Merge branch 'rk3588-ethernet-support'

Sebastian Reichel says:

====================
RK3588 Ethernet Support

This adds ethernet support for the RK3588(s) SoCs.

Changes since PATCHv2:
 * Rebased to v6.0-rc1
 * Wrap DT bindings additions at 80 characters
 * Add Acked-by from Krzysztof

Changes since PATCHv1:
 * Drop first patch (not required) and rebase second patch accordingly
 * Rename DT property rockchip,php_grf -> rockchip,php-grf
====================

Link: https://lore.kernel.org/r/20220830154559.61506-1-sebastian.reichel@collabora.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

3 files changed, 163 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/net/rockchip-dwmac.yaml b/Documentation/devicetree/bindings/net/rockchip-dwmac.yaml
index 083623c8d718..3c8c3a907181 100644
--- a/Documentation/devicetree/bindings/net/rockchip-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/rockchip-dwmac.yaml
@@ -25,6 +25,7 @@ select:
           - rockchip,rk3368-gmac
           - rockchip,rk3399-gmac
           - rockchip,rk3568-gmac
+          - rockchip,rk3588-gmac
           - rockchip,rv1108-gmac
   required:
     - compatible
@@ -50,6 +51,7 @@ properties:
       - items:
           - enum:
               - rockchip,rk3568-gmac
+              - rockchip,rk3588-gmac
           - const: snps,dwmac-4.20a
 
   clocks:
@@ -81,6 +83,11 @@ properties:
     description: The phandle of the syscon node for the general register file.
     $ref: /schemas/types.yaml#/definitions/phandle
 
+  rockchip,php-grf:
+    description:
+      The phandle of the syscon node for the peripheral general register file.
+    $ref: /schemas/types.yaml#/definitions/phandle
+
   tx_delay:
     description: Delay value for TXD timing. Range value is 0~0x7F, 0x30 as default.
     $ref: /schemas/types.yaml#/definitions/uint32
diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index 491597c02edf..2f909ffe2fe8 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -74,6 +74,7 @@ properties:
         - rockchip,rk3328-gmac
         - rockchip,rk3366-gmac
         - rockchip,rk3368-gmac
+        - rockchip,rk3588-gmac
         - rockchip,rk3399-gmac
         - rockchip,rv1108-gmac
         - snps,dwmac
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index c469abc91fa1..15dea1f2a90a 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) \
@@ -1101,6 +1104,147 @@ 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,
+		     RK3588_GMAC_RXCLK_DLY_ENABLE(id) |
+		     RK3588_GMAC_TXCLK_DLY_ENABLE(id));
+
+	regmap_write(bsp_priv->grf, offset_con,
+		     RK3588_GMAC_CLK_RX_DL_CFG(rx_delay) |
+		     RK3588_GMAC_CLK_TX_DL_CFG(tx_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 */
@@ -1304,6 +1448,10 @@ 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);
@@ -1330,6 +1478,10 @@ 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);
@@ -1444,6 +1596,8 @@ 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,
@@ -1680,6 +1834,7 @@ 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 },
 	{ }
 };