USB2 INNO PHY 驱动修改

Documentation/devicetree/bindings/phy/hisilicon,inno-usb2-phy.yaml

@@ -0,0 +1,122 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/hisilicon,inno-usb2-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HiSilicon HiSTB SoCs INNO USB2 PHY device
+
+maintainers:
+  - Yang Xiwen <[email protected]>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - hisilicon,hi3798cv200-usb2-phy
+          - hisilicon,hi3798mv100-usb2-phy
+          - hisilicon,hi3798mv200-usb2-phy
+
+  reg:
+    maxItems: 1
+    description: Should be the address space for PHY configuration register in
+      peripheral controller, e.g. PERI_USB0 for USB 2.0 PHY01 on Hi3798CV200 SoC,
+      or direct MMIO address space.
+
+  ranges:
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    enum: [0, 1]
+
+  clocks:
+    maxItems: 1
+    description: reference clock
+
+  resets:
+    minItems: 1
+    items:
+      - description: port reset
+      - description: optional external test bus reset
+
+  reset-names:
+    items:
+      - const: port
+      - const: test
+
+patternProperties:
+  'phy@[0-9a-f]+':
+    type: object
+    additionalProperties: false
+    description: individual ports provided by INNO PHY
+
+    properties:
+      reg:
+        maxItems: 1
+        description: should be the port index (if under a perictrl node)
+          or port address space
+
+      '#phy-cells':
+        const: 0
+
+      resets:
+        maxItems: 1
+
+      phy_type:
+        const: utmi
+
+    required:
+      - reg
+      - '#phy-cells'
+      - resets
+
+required:
+  - compatible
+  - clocks
+  - reg
+  - '#address-cells'
+  - '#size-cells'
+  - resets
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: hisilicon,hi3798mv200-usb2-phy
+    then:
+      required:
+        - ranges
+        - reset-names
+    else:
+      properties:
+        ranges: false
+        reset-names: false
+
+additionalProperties: false
+
+examples:
+  - |
+    usb2-phy@120 {
+        compatible = "hisilicon,hi3798cv200-usb2-phy";
+        reg = <0x120 0x4>;
+        clocks = <&clk_ref>;
+        resets = <&crg 0xbc 4>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        phy@0 {
+            reg = <0>;
+            #phy-cells = <0>;
+            resets = <&crg 0xbc 8>;
+        };
+
+        phy@1 {
+            reg = <1>;
+            #phy-cells = <0>;
+            resets = <&crg 0xbc 9>;
+        };
+    };

drivers/phy/hisilicon/phy-hisi-inno-usb2.c

@@ -10,6 +10,7 @@
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_address.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 #include <linux/reset.h>
@@ -24,6 +25,7 @@
 
 #define PHY_TYPE_0	0
 #define PHY_TYPE_1	1
+#define PHY_TYPE_MMIO	2
 
 #define PHY_TEST_DATA		GENMASK(7, 0)
 #define PHY_TEST_ADDR_OFFSET	8
@@ -43,14 +45,15 @@
 #define PHY_CLK_ENABLE		BIT(2)
 
 struct hisi_inno_phy_port {
+	void __iomem *base;
 	struct reset_control *utmi_rst;
 	struct hisi_inno_phy_priv *priv;
 };
 
 struct hisi_inno_phy_priv {
 	void __iomem *mmio;
 	struct clk *ref_clk;
-	struct reset_control *por_rst;
+	struct reset_control *rsts;
 	unsigned int type;
 	struct hisi_inno_phy_port ports[INNO_PHY_PORT_NUM];
 };
@@ -62,32 +65,39 @@ static void hisi_inno_phy_write_reg(struct hisi_inno_phy_priv *priv,
 	u32 val;
 	u32 value;
 
-	if (priv->type == PHY_TYPE_0)
-		val = (data & PHY_TEST_DATA) |
-		      ((addr << PHY_TEST_ADDR_OFFSET) & PHY0_TEST_ADDR) |
-		      ((port << PHY0_TEST_PORT_OFFSET) & PHY0_TEST_PORT) |
-		      PHY0_TEST_WREN | PHY0_TEST_RST;
-	else
-		val = (data & PHY_TEST_DATA) |
-		      ((addr << PHY_TEST_ADDR_OFFSET) & PHY1_TEST_ADDR) |
-		      ((port << PHY1_TEST_PORT_OFFSET) & PHY1_TEST_PORT) |
-		      PHY1_TEST_WREN | PHY1_TEST_RST;
-	writel(val, reg);
-
-	value = val;
-	if (priv->type == PHY_TYPE_0)
-		value |= PHY0_TEST_CLK;
-	else
-		value |= PHY1_TEST_CLK;
-	writel(value, reg);
-
-	writel(val, reg);
+	if (priv->ports[port].base)
+		// stride is 4
+		writel(data, (u32 *)priv->ports[port].base + addr);
+	else {
+		if (priv->type == PHY_TYPE_0)
+			val = (data & PHY_TEST_DATA) |
+			      ((addr << PHY_TEST_ADDR_OFFSET) & PHY0_TEST_ADDR) |
+			      ((port << PHY0_TEST_PORT_OFFSET) & PHY0_TEST_PORT) |
+			      PHY0_TEST_WREN | PHY0_TEST_RST;
+		else
+			val = (data & PHY_TEST_DATA) |
+			      ((addr << PHY_TEST_ADDR_OFFSET) & PHY1_TEST_ADDR) |
+			      ((port << PHY1_TEST_PORT_OFFSET) & PHY1_TEST_PORT) |
+			      PHY1_TEST_WREN | PHY1_TEST_RST;
+		writel(val, reg);
+
+		value = val;
+		if (priv->type == PHY_TYPE_0)
+			value |= PHY0_TEST_CLK;
+		else
+			value |= PHY1_TEST_CLK;
+		writel(value, reg);
+
+		writel(val, reg);
+	}
 }
 
 static void hisi_inno_phy_setup(struct hisi_inno_phy_priv *priv)
 {
+	int i;
 	/* The phy clk is controlled by the port0 register 0x06. */
-	hisi_inno_phy_write_reg(priv, 0, 0x06, PHY_CLK_ENABLE);
+	for (i = 0; i < INNO_PHY_PORT_NUM; i++)
+		hisi_inno_phy_write_reg(priv, i, 0x06, PHY_CLK_ENABLE);
 	msleep(PHY_CLK_STABLE_TIME);
 }
 
@@ -102,7 +112,7 @@ static int hisi_inno_phy_init(struct phy *phy)
 		return ret;
 	udelay(REF_CLK_STABLE_TIME);
 
-	reset_control_deassert(priv->por_rst);
+	reset_control_deassert(priv->rsts);
 	udelay(POR_RST_COMPLETE_TIME);
 
 	/* Set up phy registers */
@@ -120,7 +130,7 @@ static int hisi_inno_phy_exit(struct phy *phy)
 	struct hisi_inno_phy_priv *priv = port->priv;
 
 	reset_control_assert(port->utmi_rst);
-	reset_control_assert(priv->por_rst);
+	reset_control_assert(priv->rsts);
 	clk_disable_unprepare(priv->ref_clk);
 
 	return 0;
@@ -156,23 +166,27 @@ static int hisi_inno_phy_probe(struct platform_device *pdev)
 	if (IS_ERR(priv->ref_clk))
 		return PTR_ERR(priv->ref_clk);
 
-	priv->por_rst = devm_reset_control_get_exclusive(dev, NULL);
-	if (IS_ERR(priv->por_rst))
-		return PTR_ERR(priv->por_rst);
+	priv->rsts = devm_reset_control_array_get(dev, false, false);
+	if (IS_ERR(priv->rsts))
+		return PTR_ERR(priv->rsts);
 
 	priv->type = (uintptr_t) of_device_get_match_data(dev);
 
 	for_each_child_of_node(np, child) {
 		struct reset_control *rst;
 		struct phy *phy;
+		void __iomem *base;
 
 		rst = of_reset_control_get_exclusive(child, NULL);
 		if (IS_ERR(rst)) {
 			of_node_put(child);
 			return PTR_ERR(rst);
 		}
 
+		base = of_iomap(child, 0);
+
 		priv->ports[i].utmi_rst = rst;
+		priv->ports[i].base = base;
 		priv->ports[i].priv = priv;
 
 		phy = devm_phy_create(dev, child, &hisi_inno_phy_ops);
@@ -203,6 +217,8 @@ static const struct of_device_id hisi_inno_phy_of_match[] = {
 	  .data = (void *) PHY_TYPE_0 },
 	{ .compatible = "hisilicon,hi3798mv100-usb2-phy",
 	  .data = (void *) PHY_TYPE_1 },
+	{ .compatible = "hisilicon,hi3798mv200-usb2-phy",
+	  .data = (void *) PHY_TYPE_MMIO },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, hisi_inno_phy_of_match);