[PATCH v3 2/5] phy: starfive: add JH7110 PCIE 2.0 and USB 2.0 PHY driver.
Minda Chen
minda.chen at starfivetech.com
Wed Mar 15 03:44:08 PDT 2023
Add Starfive JH7110 SoC PCIe 2.0 and USB 2.0 PHY driver support.
PCIe 2.0 PHY can used as USB 3.0 PHY
Signed-off-by: Minda Chen <minda.chen at starfivetech.com>
---
MAINTAINERS | 8 ++
drivers/phy/starfive/Kconfig | 22 ++++
drivers/phy/starfive/Makefile | 2 +
drivers/phy/starfive/phy-jh7110-pcie.c | 136 ++++++++++++++++++++
drivers/phy/starfive/phy-jh7110-usb.c | 167 +++++++++++++++++++++++++
5 files changed, 335 insertions(+)
create mode 100644 drivers/phy/starfive/phy-jh7110-pcie.c
create mode 100644 drivers/phy/starfive/phy-jh7110-usb.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 8361b8e710ca..4263c005e45c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19977,6 +19977,14 @@ S: Supported
F: Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
F: drivers/phy/starfive/phy-starfive-dphy-rx.c
+STARFIVE JH71X0 PCIE AND USB PHY DRIVER
+M: Emil Renner Berthing <kernel at esmil.dk>
+M: Minda Chen <minda.chen at starfivetech.com>
+S: Supported
+F: Documentation/devicetree/bindings/phy/starfive,jh7110-usb-pcie-phy.yaml
+F: drivers/phy/starfive/phy-jh7110-pcie.c
+F: drivers/phy/starfive/phy-jh7110-usb.c
+
STATIC BRANCH/CALL
M: Peter Zijlstra <peterz at infradead.org>
M: Josh Poimboeuf <jpoimboe at kernel.org>
diff --git a/drivers/phy/starfive/Kconfig b/drivers/phy/starfive/Kconfig
index e449a662acf5..dd0f139b5bfb 100644
--- a/drivers/phy/starfive/Kconfig
+++ b/drivers/phy/starfive/Kconfig
@@ -11,3 +11,25 @@ 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.
+
+config PHY_STARFIVE_JH7110_PCIE
+ tristate "Starfive JH7110 PCIE 2.0/USB 3.0 PHY support"
+ depends on USB_SUPPORT
+ select GENERIC_PHY
+ select USB_PHY
+ help
+ Enable this to support the StarFive PCIe 2.0 PHY,
+ or used as USB 3.0 PHY.
+ If M is selected, the module will be called
+ phy-jh7110-pcie.ko.
diff --git a/drivers/phy/starfive/Makefile b/drivers/phy/starfive/Makefile
index 7ec576cb30ae..c3eaf1b34cbb 100644
--- a/drivers/phy/starfive/Makefile
+++ b/drivers/phy/starfive/Makefile
@@ -1,2 +1,4 @@
# 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
+obj-$(CONFIG_PHY_STARFIVE_JH7110_PCIE) += phy-jh7110-pcie.o
diff --git a/drivers/phy/starfive/phy-jh7110-pcie.c b/drivers/phy/starfive/phy-jh7110-pcie.c
new file mode 100644
index 000000000000..30a8fa1f580d
--- /dev/null
+++ b/drivers/phy/starfive/phy-jh7110-pcie.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * StarFive JH7110 PCIe 2.0 PHY driver
+ *
+ * Copyright (C) 2023 Minda Chen <minda.chen at 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>
+
+#define PCIE_KVCO_LEVEL_OFF (0x28)
+#define PCIE_USB3_PHY_PLL_CTL_OFF (0x7c)
+#define PCIE_KVCO_TUNE_SIGNAL_OFF (0x80)
+#define PCIE_USB3_PHY_ENABLE BIT(4)
+#define PHY_KVCO_FINE_TUNE_LEVEL 0x91
+#define PHY_KVCO_FINE_TUNE_SIGNALS 0xc
+
+struct jh7110_pcie_phy {
+ struct phy *phy;
+ void __iomem *regs;
+ enum phy_mode mode;
+};
+
+static void jh7110_usb3_mode_set(struct jh7110_pcie_phy *phy)
+{
+ /* Configuare spread-spectrum mode: down-spread-spectrum */
+ writel(PCIE_USB3_PHY_ENABLE, phy->regs + PCIE_USB3_PHY_PLL_CTL_OFF);
+}
+
+static void jh7110_pcie_mode_set(struct jh7110_pcie_phy *phy)
+{
+ /* PCIe Multi-PHY PLL KVCO Gain fine tune settings: */
+ writel(PHY_KVCO_FINE_TUNE_LEVEL, phy->regs + PCIE_KVCO_LEVEL_OFF);
+ writel(PHY_KVCO_FINE_TUNE_SIGNALS, phy->regs + PCIE_KVCO_TUNE_SIGNAL_OFF);
+}
+
+static int jh7110_pcie_phy_set_mode(struct phy *_phy,
+ enum phy_mode mode, int submode)
+{
+ struct jh7110_pcie_phy *phy = phy_get_drvdata(_phy);
+
+ if (mode != phy->mode) {
+ switch (mode) {
+ case PHY_MODE_USB_HOST:
+ case PHY_MODE_USB_DEVICE:
+ case PHY_MODE_USB_OTG:
+ jh7110_usb3_mode_set(phy);
+ break;
+ case PHY_MODE_PCIE:
+ jh7110_pcie_mode_set(phy);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ dev_info(&_phy->dev, "Changing phy mode to %d\n", mode);
+ phy->mode = mode;
+ }
+
+ return 0;
+}
+
+static int jh7110_pcie_phy_init(struct phy *_phy)
+{
+ return 0;
+}
+
+static int jh7110_pcie_phy_exit(struct phy *_phy)
+{
+ return 0;
+}
+
+static const struct phy_ops jh7110_pcie_phy_ops = {
+ .init = jh7110_pcie_phy_init,
+ .exit = jh7110_pcie_phy_exit,
+ .set_mode = jh7110_pcie_phy_set_mode,
+ .owner = THIS_MODULE,
+};
+
+static int jh7110_pcie_phy_probe(struct platform_device *pdev)
+{
+ struct jh7110_pcie_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->regs = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(phy->regs))
+ return PTR_ERR(phy->regs);
+
+ phy->phy = devm_phy_create(dev, NULL, &jh7110_pcie_phy_ops);
+ if (IS_ERR(phy->phy))
+ return dev_err_probe(dev, PTR_ERR(phy->regs),
+ "Failed to map phy base\n");
+
+ platform_set_drvdata(pdev, phy);
+ 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 int jh7110_pcie_phy_remove(struct platform_device *pdev)
+{
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static const struct of_device_id jh7110_pcie_phy_of_match[] = {
+ { .compatible = "starfive,jh7110-pcie-phy" },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, jh7110_pcie_phy_of_match);
+
+static struct platform_driver jh7110_pcie_phy_driver = {
+ .probe = jh7110_pcie_phy_probe,
+ .remove = jh7110_pcie_phy_remove,
+ .driver = {
+ .of_match_table = jh7110_pcie_phy_of_match,
+ .name = "jh7110-pcie-phy",
+ }
+};
+module_platform_driver(jh7110_pcie_phy_driver);
+
+MODULE_DESCRIPTION("StarFive JH7110 PCIe 2.0 PHY driver");
+MODULE_AUTHOR("Minda Chen <minda.chen at starfivetech.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/phy/starfive/phy-jh7110-usb.c b/drivers/phy/starfive/phy-jh7110-usb.c
new file mode 100644
index 000000000000..89db0b7b1224
--- /dev/null
+++ b/drivers/phy/starfive/phy-jh7110-usb.c
@@ -0,0 +1,167 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * StarFive JH7110 USB 2.0 PHY driver
+ *
+ * Copyright (C) 2023 Minda Chen <minda.chen at 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_125;
+ enum usb_dr_mode dr_mode;
+};
+
+static void jh7110_usb2_mode_set(struct jh7110_usb2_phy *phy)
+{
+ unsigned int val;
+
+ if (phy->dr_mode != USB_DR_MODE_PERIPHERAL) {
+ /* 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);
+ int new_mode;
+
+ switch (mode) {
+ case PHY_MODE_USB_HOST:
+ new_mode = USB_DR_MODE_HOST;
+ break;
+ case PHY_MODE_USB_DEVICE:
+ new_mode = USB_DR_MODE_PERIPHERAL;
+ break;
+ case PHY_MODE_USB_OTG:
+ new_mode = USB_DR_MODE_OTG;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (new_mode != phy->dr_mode) {
+ dev_info(&_phy->dev, "Changing dr_mode to %d\n", new_mode);
+ phy->dr_mode = new_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_125);
+ 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_125);
+
+ 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_125 = devm_clk_get(dev, "app_125");
+ if (IS_ERR(phy->app_125))
+ return dev_err_probe(dev, PTR_ERR(phy->app_125),
+ "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");
+
+ platform_set_drvdata(pdev, phy);
+ 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 int jh7110_usb_phy_remove(struct platform_device *pdev)
+{
+ struct jh7110_usb2_phy *phy = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(phy->app_125);
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+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,
+ .remove = jh7110_usb_phy_remove,
+ .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 at starfivetech.com>");
+MODULE_LICENSE("GPL");
--
2.17.1
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