+++ /dev/null
-From 6d91f2830c78d2e206e65d5541ddd73a60caf102 Mon Sep 17 00:00:00 2001
-From: Minda Chen <minda.chen@starfivetech.com>
-Date: Thu, 18 May 2023 19:27:46 +0800
-Subject: [PATCH 102/129] phy: starfive: Add JH7110 USB 2.0 PHY driver
-
-Add Starfive JH7110 SoC USB 2.0 PHY driver support.
-USB 2.0 PHY default connect to Cadence USB controller.
-
-Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
----
- drivers/phy/starfive/Kconfig | 11 ++
- drivers/phy/starfive/Makefile | 1 +
- drivers/phy/starfive/phy-jh7110-usb.c | 150 ++++++++++++++++++++++++++
- 3 files changed, 162 insertions(+)
- create mode 100644 drivers/phy/starfive/phy-jh7110-usb.c
-
-diff --git a/drivers/phy/starfive/Kconfig b/drivers/phy/starfive/Kconfig
-index f989b8ff8..2c013c390 100644
---- a/drivers/phy/starfive/Kconfig
-+++ b/drivers/phy/starfive/Kconfig
-@@ -11,3 +11,14 @@ config PHY_STARFIVE_DPHY_RX
- Choose this option if you have a StarFive D-PHY in your
- system. If M is selected, the module will be called
- phy-starfive-dphy-rx.
-+
-+config PHY_STARFIVE_JH7110_USB
-+ tristate "Starfive JH7110 USB 2.0 PHY support"
-+ depends on USB_SUPPORT
-+ select GENERIC_PHY
-+ select USB_PHY
-+ help
-+ Enable this to support the StarFive USB 2.0 PHY,
-+ used with the Cadence USB controller.
-+ If M is selected, the module will be called
-+ phy-jh7110-usb.ko.
-diff --git a/drivers/phy/starfive/Makefile b/drivers/phy/starfive/Makefile
-index 7ec576cb3..176443852 100644
---- a/drivers/phy/starfive/Makefile
-+++ b/drivers/phy/starfive/Makefile
-@@ -1,2 +1,3 @@
- # SPDX-License-Identifier: GPL-2.0
- obj-$(CONFIG_PHY_STARFIVE_DPHY_RX) += phy-starfive-dphy-rx.o
-+obj-$(CONFIG_PHY_STARFIVE_JH7110_USB) += phy-jh7110-usb.o
-diff --git a/drivers/phy/starfive/phy-jh7110-usb.c b/drivers/phy/starfive/phy-jh7110-usb.c
-new file mode 100644
-index 000000000..90d788423
---- /dev/null
-+++ b/drivers/phy/starfive/phy-jh7110-usb.c
-@@ -0,0 +1,150 @@
-+// SPDX-License-Identifier: GPL-2.0+
-+/*
-+ * StarFive JH7110 USB 2.0 PHY driver
-+ *
-+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
-+ * Author: Minda Chen <minda.chen@starfivetech.com>
-+ */
-+
-+#include <linux/bits.h>
-+#include <linux/clk.h>
-+#include <linux/err.h>
-+#include <linux/io.h>
-+#include <linux/module.h>
-+#include <linux/phy/phy.h>
-+#include <linux/platform_device.h>
-+#include <linux/usb/of.h>
-+
-+#define USB_125M_CLK_RATE 125000000
-+#define USB_LS_KEEPALIVE_OFF 0x4
-+#define USB_LS_KEEPALIVE_ENABLE BIT(4)
-+
-+struct jh7110_usb2_phy {
-+ struct phy *phy;
-+ void __iomem *regs;
-+ struct clk *usb_125m_clk;
-+ struct clk *app_125m;
-+ enum phy_mode mode;
-+};
-+
-+static void jh7110_usb2_mode_set(struct jh7110_usb2_phy *phy)
-+{
-+ unsigned int val;
-+
-+ if (phy->mode != PHY_MODE_USB_HOST) {
-+ /* Enable the LS speed keep-alive signal */
-+ val = readl(phy->regs + USB_LS_KEEPALIVE_OFF);
-+ val |= USB_LS_KEEPALIVE_ENABLE;
-+ writel(val, phy->regs + USB_LS_KEEPALIVE_OFF);
-+ }
-+}
-+
-+static int jh7110_usb2_phy_set_mode(struct phy *_phy,
-+ enum phy_mode mode, int submode)
-+{
-+ struct jh7110_usb2_phy *phy = phy_get_drvdata(_phy);
-+
-+ switch (mode) {
-+ case PHY_MODE_USB_HOST:
-+ case PHY_MODE_USB_DEVICE:
-+ case PHY_MODE_USB_OTG:
-+ break;
-+ default:
-+ return -EINVAL;
-+ }
-+
-+ if (mode != phy->mode) {
-+ dev_dbg(&_phy->dev, "Changing phy to %d\n", mode);
-+ phy->mode = mode;
-+ jh7110_usb2_mode_set(phy);
-+ }
-+
-+ return 0;
-+}
-+
-+static int jh7110_usb2_phy_init(struct phy *_phy)
-+{
-+ struct jh7110_usb2_phy *phy = phy_get_drvdata(_phy);
-+ int ret;
-+
-+ ret = clk_set_rate(phy->usb_125m_clk, USB_125M_CLK_RATE);
-+ if (ret)
-+ return ret;
-+
-+ ret = clk_prepare_enable(phy->app_125m);
-+ if (ret)
-+ return ret;
-+
-+ return 0;
-+}
-+
-+static int jh7110_usb2_phy_exit(struct phy *_phy)
-+{
-+ struct jh7110_usb2_phy *phy = phy_get_drvdata(_phy);
-+
-+ clk_disable_unprepare(phy->app_125m);
-+
-+ return 0;
-+}
-+
-+static const struct phy_ops jh7110_usb2_phy_ops = {
-+ .init = jh7110_usb2_phy_init,
-+ .exit = jh7110_usb2_phy_exit,
-+ .set_mode = jh7110_usb2_phy_set_mode,
-+ .owner = THIS_MODULE,
-+};
-+
-+static int jh7110_usb_phy_probe(struct platform_device *pdev)
-+{
-+ struct jh7110_usb2_phy *phy;
-+ struct device *dev = &pdev->dev;
-+ struct phy_provider *phy_provider;
-+
-+ phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
-+ if (!phy)
-+ return -ENOMEM;
-+
-+ phy->usb_125m_clk = devm_clk_get(dev, "125m");
-+ if (IS_ERR(phy->usb_125m_clk))
-+ return dev_err_probe(dev, PTR_ERR(phy->usb_125m_clk),
-+ "Failed to get 125m clock\n");
-+
-+ phy->app_125m = devm_clk_get(dev, "app_125m");
-+ if (IS_ERR(phy->app_125m))
-+ return dev_err_probe(dev, PTR_ERR(phy->app_125m),
-+ "Failed to get app 125m clock\n");
-+
-+ phy->regs = devm_platform_ioremap_resource(pdev, 0);
-+ if (IS_ERR(phy->regs))
-+ return dev_err_probe(dev, PTR_ERR(phy->regs),
-+ "Failed to map phy base\n");
-+
-+ phy->phy = devm_phy_create(dev, NULL, &jh7110_usb2_phy_ops);
-+ if (IS_ERR(phy->phy))
-+ return dev_err_probe(dev, PTR_ERR(phy->phy),
-+ "Failed to create phy\n");
-+
-+ phy_set_drvdata(phy->phy, phy);
-+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
-+
-+ return PTR_ERR_OR_ZERO(phy_provider);
-+}
-+
-+static const struct of_device_id jh7110_usb_phy_of_match[] = {
-+ { .compatible = "starfive,jh7110-usb-phy" },
-+ { /* sentinel */ },
-+};
-+MODULE_DEVICE_TABLE(of, jh7110_usb_phy_of_match);
-+
-+static struct platform_driver jh7110_usb_phy_driver = {
-+ .probe = jh7110_usb_phy_probe,
-+ .driver = {
-+ .of_match_table = jh7110_usb_phy_of_match,
-+ .name = "jh7110-usb-phy",
-+ }
-+};
-+module_platform_driver(jh7110_usb_phy_driver);
-+
-+MODULE_DESCRIPTION("StarFive JH7110 USB 2.0 PHY driver");
-+MODULE_AUTHOR("Minda Chen <minda.chen@starfivetech.com>");
-+MODULE_LICENSE("GPL");
---
-2.25.1
-
projects / openwrt / staging / wigyori.git / blobdiff