Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 189 insertions, 0 deletions

diff --git a/drivers/phy/hisilicon/phy-hisi-inno-usb2.c b/drivers/phy/hisilicon/phy-hisi-inno-usb2.c
new file mode 100644
index 000000000..a922fb11a
--- /dev/null
+++ b/drivers/phy/hisilicon/phy-hisi-inno-usb2.c
@@ -0,0 +1,189 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * HiSilicon INNO USB2 PHY Driver.
+ *
+ * Copyright (c) 2016-2017 HiSilicon Technologies Co., Ltd.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+#include <linux/reset.h>
+
+#define INNO_PHY_PORT_NUM	2
+#define REF_CLK_STABLE_TIME	100	/* unit:us */
+#define UTMI_CLK_STABLE_TIME	200	/* unit:us */
+#define TEST_CLK_STABLE_TIME	2	/* unit:ms */
+#define PHY_CLK_STABLE_TIME	2	/* unit:ms */
+#define UTMI_RST_COMPLETE_TIME	2	/* unit:ms */
+#define POR_RST_COMPLETE_TIME	300	/* unit:us */
+#define PHY_TEST_DATA		GENMASK(7, 0)
+#define PHY_TEST_ADDR		GENMASK(15, 8)
+#define PHY_TEST_PORT		GENMASK(18, 16)
+#define PHY_TEST_WREN		BIT(21)
+#define PHY_TEST_CLK		BIT(22)	/* rising edge active */
+#define PHY_TEST_RST		BIT(23)	/* low active */
+#define PHY_CLK_ENABLE		BIT(2)
+
+struct hisi_inno_phy_port {
+	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 hisi_inno_phy_port ports[INNO_PHY_PORT_NUM];
+};
+
+static void hisi_inno_phy_write_reg(struct hisi_inno_phy_priv *priv,
+				    u8 port, u32 addr, u32 data)
+{
+	void __iomem *reg = priv->mmio;
+	u32 val;
+
+	val = (data & PHY_TEST_DATA) |
+	      ((addr << 8) & PHY_TEST_ADDR) |
+	      ((port << 16) & PHY_TEST_PORT) |
+	      PHY_TEST_WREN | PHY_TEST_RST;
+	writel(val, reg);
+
+	val |= PHY_TEST_CLK;
+	writel(val, reg);
+
+	val &= ~PHY_TEST_CLK;
+	writel(val, reg);
+}
+
+static void hisi_inno_phy_setup(struct hisi_inno_phy_priv *priv)
+{
+	/* The phy clk is controlled by the port0 register 0x06. */
+	hisi_inno_phy_write_reg(priv, 0, 0x06, PHY_CLK_ENABLE);
+	msleep(PHY_CLK_STABLE_TIME);
+}
+
+static int hisi_inno_phy_init(struct phy *phy)
+{
+	struct hisi_inno_phy_port *port = phy_get_drvdata(phy);
+	struct hisi_inno_phy_priv *priv = port->priv;
+	int ret;
+
+	ret = clk_prepare_enable(priv->ref_clk);
+	if (ret)
+		return ret;
+	udelay(REF_CLK_STABLE_TIME);
+
+	reset_control_deassert(priv->por_rst);
+	udelay(POR_RST_COMPLETE_TIME);
+
+	/* Set up phy registers */
+	hisi_inno_phy_setup(priv);
+
+	reset_control_deassert(port->utmi_rst);
+	udelay(UTMI_RST_COMPLETE_TIME);
+
+	return 0;
+}
+
+static int hisi_inno_phy_exit(struct phy *phy)
+{
+	struct hisi_inno_phy_port *port = phy_get_drvdata(phy);
+	struct hisi_inno_phy_priv *priv = port->priv;
+
+	reset_control_assert(port->utmi_rst);
+	reset_control_assert(priv->por_rst);
+	clk_disable_unprepare(priv->ref_clk);
+
+	return 0;
+}
+
+static const struct phy_ops hisi_inno_phy_ops = {
+	.init = hisi_inno_phy_init,
+	.exit = hisi_inno_phy_exit,
+	.owner = THIS_MODULE,
+};
+
+static int hisi_inno_phy_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct hisi_inno_phy_priv *priv;
+	struct phy_provider *provider;
+	struct device_node *child;
+	int i = 0;
+	int ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->mmio = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(priv->mmio)) {
+		ret = PTR_ERR(priv->mmio);
+		return ret;
+	}
+
+	priv->ref_clk = devm_clk_get(dev, NULL);
+	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);
+
+	for_each_child_of_node(np, child) {
+		struct reset_control *rst;
+		struct phy *phy;
+
+		rst = of_reset_control_get_exclusive(child, NULL);
+		if (IS_ERR(rst)) {
+			of_node_put(child);
+			return PTR_ERR(rst);
+		}
+
+		priv->ports[i].utmi_rst = rst;
+		priv->ports[i].priv = priv;
+
+		phy = devm_phy_create(dev, child, &hisi_inno_phy_ops);
+		if (IS_ERR(phy)) {
+			of_node_put(child);
+			return PTR_ERR(phy);
+		}
+
+		phy_set_bus_width(phy, 8);
+		phy_set_drvdata(phy, &priv->ports[i]);
+		i++;
+
+		if (i >= INNO_PHY_PORT_NUM) {
+			dev_warn(dev, "Support %d ports in maximum\n", i);
+			of_node_put(child);
+			break;
+		}
+	}
+
+	provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+	return PTR_ERR_OR_ZERO(provider);
+}
+
+static const struct of_device_id hisi_inno_phy_of_match[] = {
+	{ .compatible = "hisilicon,inno-usb2-phy", },
+	{ .compatible = "hisilicon,hi3798cv200-usb2-phy", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, hisi_inno_phy_of_match);
+
+static struct platform_driver hisi_inno_phy_driver = {
+	.probe	= hisi_inno_phy_probe,
+	.driver = {
+		.name	= "hisi-inno-phy",
+		.of_match_table	= hisi_inno_phy_of_match,
+	}
+};
+module_platform_driver(hisi_inno_phy_driver);
+
+MODULE_DESCRIPTION("HiSilicon INNO USB2 PHY Driver");
+MODULE_LICENSE("GPL v2");