Add Starfive JH7110 USB 2.0 PHY driver, which is generic PHY driver.
Signed-off-by: Minda Chen minda.chen@starfivetech.com Reviewed-by: Roger Quadros rogerq@kernel.org --- drivers/phy/Kconfig | 1 + drivers/phy/Makefile | 1 + drivers/phy/starfive/Kconfig | 14 ++ drivers/phy/starfive/Makefile | 6 + drivers/phy/starfive/phy-jh7110-usb-syscon.h | 9 ++ drivers/phy/starfive/phy-jh7110-usb2.c | 162 +++++++++++++++++++ 6 files changed, 193 insertions(+) create mode 100644 drivers/phy/starfive/Kconfig create mode 100644 drivers/phy/starfive/Makefile create mode 100644 drivers/phy/starfive/phy-jh7110-usb-syscon.h create mode 100644 drivers/phy/starfive/phy-jh7110-usb2.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index e12347e8a03..f940648fe58 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -309,5 +309,6 @@ source "drivers/phy/cadence/Kconfig" source "drivers/phy/ti/Kconfig" source "drivers/phy/qcom/Kconfig" source "drivers/phy/renesas/Kconfig" +source "drivers/phy/starfive/Kconfig"
endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index c35f9294dd9..ce4ea28b299 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -44,3 +44,4 @@ obj-y += cadence/ obj-y += ti/ obj-y += qcom/ obj-y += renesas/ +obj-y += starfive/ diff --git a/drivers/phy/starfive/Kconfig b/drivers/phy/starfive/Kconfig new file mode 100644 index 00000000000..a7cf0a55dff --- /dev/null +++ b/drivers/phy/starfive/Kconfig @@ -0,0 +1,14 @@ +# +# PHY drivers for Starfive platforms +# + +menu "Starfive PHY driver" + +config PHY_STARFIVE_JH7110_USB2 + bool "Starfive JH7110 USB 2.0 PHY driver" + depends on PHY + help + Enable this to support the Starfive JH7110 USB 2.0 PHY. + Generic PHY driver JH7110 USB 2.0. + +endmenu diff --git a/drivers/phy/starfive/Makefile b/drivers/phy/starfive/Makefile new file mode 100644 index 00000000000..a405a75e34c --- /dev/null +++ b/drivers/phy/starfive/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright (C) 2023 Starfive +# + +obj-$(CONFIG_PHY_STARFIVE_JH7110_USB2) += phy-jh7110-usb2.o diff --git a/drivers/phy/starfive/phy-jh7110-usb-syscon.h b/drivers/phy/starfive/phy-jh7110-usb-syscon.h new file mode 100644 index 00000000000..0eb66f0d859 --- /dev/null +++ b/drivers/phy/starfive/phy-jh7110-usb-syscon.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef PHY_JH7110_USB_SYSCON_H_ +#define PHY_JH7110_USB_SYSCON_H_ + +#define SYSCON_USB_PDRSTN_REG_OFFSET 0x18 +#define USB_PDRSTN_SPLIT_BIT 17 + +#endif diff --git a/drivers/phy/starfive/phy-jh7110-usb2.c b/drivers/phy/starfive/phy-jh7110-usb2.c new file mode 100644 index 00000000000..1a28381e0df --- /dev/null +++ b/drivers/phy/starfive/phy-jh7110-usb2.c @@ -0,0 +1,162 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * StarFive JH7110 USB 2.0 PHY driver + * + * Copyright (C) 2024 StarFive Technology Co., Ltd. + * Author: Minda Chen minda.chen@starfivetech.com + */ + +#include <asm/io.h> +#include <clk.h> +#include <dm.h> +#include <dm/device_compat.h> +#include <errno.h> +#include <generic-phy.h> +#include <regmap.h> +#include <soc.h> +#include <syscon.h> +#include <linux/bitops.h> +#include <linux/err.h> + +#include "phy-jh7110-usb-syscon.h" + +#define USB_LS_KEEPALIVE_OFF 0x4 +#define USB_LS_KEEPALIVE_ENABLE BIT(4) +#define USB_PHY_CLK_RATE 125000000 + +struct jh7110_usb2_phy { + struct phy *phy; + struct regmap *sys_syscon; + void __iomem *regs; + struct clk *usb_125m_clk; + struct clk *app_125m; + struct regmap_field *usb_split; + enum phy_mode mode; +}; + +static void usb2_set_ls_keepalive(struct jh7110_usb2_phy *phy, bool set) +{ + /* Host mode enable the LS speed keep-alive signal */ + clrsetbits_le32(phy->regs + USB_LS_KEEPALIVE_OFF, + USB_LS_KEEPALIVE_ENABLE, + set ? USB_LS_KEEPALIVE_ENABLE : 0); +} + +static int usb2_phy_set_mode(struct phy *phy, + enum phy_mode mode, int submode) +{ + struct udevice *dev = phy->dev; + struct jh7110_usb2_phy *usb2_phy = dev_get_priv(dev); + + if (mode == usb2_phy->mode) + return 0; + + switch (mode) { + case PHY_MODE_USB_HOST: + case PHY_MODE_USB_DEVICE: + case PHY_MODE_USB_OTG: + dev_dbg(dev, "Changing PHY to %d\n", mode); + usb2_phy->mode = mode; + usb2_set_ls_keepalive(usb2_phy, (mode != PHY_MODE_USB_DEVICE)); + break; + default: + return -EINVAL; + } + + /* set default split usb 2.0 only mode */ + regmap_field_write(usb2_phy->usb_split, true); + + return 0; +} + +static int jh7110_usb2_phy_init(struct phy *phy) +{ + struct udevice *dev = phy->dev; + struct jh7110_usb2_phy *usb2_phy = dev_get_priv(dev); + int ret; + + ret = clk_set_rate(usb2_phy->usb_125m_clk, USB_PHY_CLK_RATE); + if (ret < 0) { + dev_err(dev, "Failed to set 125m clock\n"); + return ret; + } + + return clk_prepare_enable(usb2_phy->app_125m); +} + +static int jh7110_usb2_phy_exit(struct phy *phy) +{ + struct udevice *dev = phy->dev; + struct jh7110_usb2_phy *usb2_phy = dev_get_priv(dev); + + clk_disable_unprepare(usb2_phy->app_125m); + + return 0; +} + +struct phy_ops jh7110_usb2_phy_ops = { + .init = jh7110_usb2_phy_init, + .exit = jh7110_usb2_phy_exit, + .set_mode = usb2_phy_set_mode, +}; + +int jh7110_usb2_phy_probe(struct udevice *dev) +{ + struct jh7110_usb2_phy *phy = dev_get_priv(dev); + ofnode node; + struct reg_field usb_split; + int ret; + + phy->regs = dev_read_addr_ptr(dev); + if (!phy->regs) + return -EINVAL; + + node = ofnode_by_compatible(ofnode_null(), "starfive,jh7110-sys-syscon"); + if (!ofnode_valid(node)) { + dev_err(dev, "Can't get syscon dev node\n"); + return -ENODEV; + } + + phy->sys_syscon = syscon_node_to_regmap(node); + if (IS_ERR(phy->sys_syscon)) { + dev_err(dev, "Can't get syscon regmap: %d\n", ret); + return PTR_ERR(phy->sys_syscon); + } + + usb_split.reg = SYSCON_USB_PDRSTN_REG_OFFSET; + usb_split.lsb = USB_PDRSTN_SPLIT_BIT; + usb_split.msb = USB_PDRSTN_SPLIT_BIT; + phy->usb_split = devm_regmap_field_alloc(dev, phy->sys_syscon, usb_split); + if (IS_ERR(phy->usb_split)) { + dev_err(dev, "USB split field init failed\n"); + return PTR_ERR(phy->usb_split); + } + + phy->usb_125m_clk = devm_clk_get(dev, "125m"); + if (IS_ERR(phy->usb_125m_clk)) { + dev_err(dev, "Failed to get 125m clock\n"); + return PTR_ERR(phy->usb_125m_clk); + } + + phy->app_125m = devm_clk_get(dev, "app_125m"); + if (IS_ERR(phy->app_125m)) { + dev_err(dev, "Failed to get app 125m clock\n"); + return PTR_ERR(phy->app_125m); + } + + return 0; +} + +static const struct udevice_id jh7110_usb2_phy[] = { + { .compatible = "starfive,jh7110-usb-phy"}, + {}, +}; + +U_BOOT_DRIVER(jh7110_usb2_phy) = { + .name = "jh7110_usb2_phy", + .id = UCLASS_PHY, + .of_match = jh7110_usb2_phy, + .probe = jh7110_usb2_phy_probe, + .ops = &jh7110_usb2_phy_ops, + .priv_auto = sizeof(struct jh7110_usb2_phy), +};