From: Bhupesh Sharma bhupesh.linux@gmail.com
Some Qualcomm SoCs newer than SDM845 feature a so-called "7nm phy" driver, notable the SM8250 SoC which will gain U-Boot support in upcoming patches.
Introduce a driver based on the Linux driver.
Signed-off-by: Bhupesh Sharma bhupesh.sharma@linaro.org [code cleanup, switch to clk/reset_bulk APIs] Signed-off-by: Caleb Connolly caleb.connolly@linaro.org --- drivers/phy/qcom/Kconfig | 8 + drivers/phy/qcom/Makefile | 1 + drivers/phy/qcom/phy-qcom-usb-hs-7nm.c | 295 +++++++++++++++++++++++++++++++++ 3 files changed, 304 insertions(+)
diff --git a/drivers/phy/qcom/Kconfig b/drivers/phy/qcom/Kconfig index 361dfb6e1126..3fc59dc65650 100644 --- a/drivers/phy/qcom/Kconfig +++ b/drivers/phy/qcom/Kconfig @@ -18,8 +18,16 @@ config PHY_QCOM_QUSB2 help Enable this to support the Super-Speed USB transceiver on various Qualcomm chipsets.
+config PHY_QCOM_USB_HS_7NM + tristate "Qualcomm 7nm High-Speed PHY" + depends on PHY && ARCH_SNAPDRAGON + help + Enable this to support the Qualcomm Synopsys DesignWare Core 7nm + High-Speed PHY driver. This driver supports the Hi-Speed PHY which + is usually paired with Synopsys DWC3 USB IPs on MSM SOCs. + config PHY_QCOM_USB_HS_28NM tristate "Qualcomm 28nm High-Speed PHY" depends on PHY && ARCH_SNAPDRAGON help diff --git a/drivers/phy/qcom/Makefile b/drivers/phy/qcom/Makefile index f6af985666a4..39219ecd24aa 100644 --- a/drivers/phy/qcom/Makefile +++ b/drivers/phy/qcom/Makefile @@ -1,5 +1,6 @@ obj-$(CONFIG_PHY_QCOM_IPQ4019_USB) += phy-qcom-ipq4019-usb.o obj-$(CONFIG_MSM8916_USB_PHY) += msm8916-usbh-phy.o obj-$(CONFIG_PHY_QCOM_QUSB2) += phy-qcom-qusb2.o +obj-$(CONFIG_PHY_QCOM_USB_HS_7NM) += phy-qcom-usb-hs-7nm.o obj-$(CONFIG_PHY_QCOM_USB_HS_28NM) += phy-qcom-usb-hs-28nm.o obj-$(CONFIG_PHY_QCOM_USB_SS) += phy-qcom-usb-ss.o diff --git a/drivers/phy/qcom/phy-qcom-usb-hs-7nm.c b/drivers/phy/qcom/phy-qcom-usb-hs-7nm.c new file mode 100644 index 000000000000..65128b45937b --- /dev/null +++ b/drivers/phy/qcom/phy-qcom-usb-hs-7nm.c @@ -0,0 +1,295 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2023 Bhupesh Sharma bhupesh.sharma@linaro.org + * + * Based on Linux driver + */ + +#include <clk.h> +#include <clk-uclass.h> +#include <dm.h> +#include <dm/device_compat.h> +#include <dm/devres.h> +#include <generic-phy.h> +#include <malloc.h> +#include <reset.h> + +#include <asm/io.h> +#include <linux/bitops.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/iopoll.h> + +#define USB2_PHY_USB_PHY_UTMI_CTRL0 (0x3c) +#define SLEEPM BIT(0) +#define OPMODE_MASK GENMASK(4, 3) +#define OPMODE_NORMAL (0x00) +#define OPMODE_NONDRIVING BIT(3) +#define TERMSEL BIT(5) + +#define USB2_PHY_USB_PHY_UTMI_CTRL1 (0x40) +#define XCVRSEL BIT(0) + +#define USB2_PHY_USB_PHY_UTMI_CTRL5 (0x50) +#define POR BIT(1) + +#define USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON0 (0x54) +#define SIDDQ BIT(2) +#define RETENABLEN BIT(3) +#define FSEL_MASK GENMASK(6, 4) +#define FSEL_DEFAULT (0x3 << 4) + +#define USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON1 (0x58) +#define VBUSVLDEXTSEL0 BIT(4) +#define PLLBTUNE BIT(5) + +#define USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON2 (0x5c) +#define VREGBYPASS BIT(0) + +#define USB2_PHY_USB_PHY_HS_PHY_CTRL1 (0x60) +#define VBUSVLDEXT0 BIT(0) + +#define USB2_PHY_USB_PHY_HS_PHY_CTRL2 (0x64) +#define USB2_AUTO_RESUME BIT(0) +#define USB2_SUSPEND_N BIT(2) +#define USB2_SUSPEND_N_SEL BIT(3) + +#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0 (0x6c) +#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1 (0x70) +#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2 (0x74) +#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X3 (0x78) +#define PARAM_OVRD_MASK 0xFF + +#define USB2_PHY_USB_PHY_CFG0 (0x94) +#define UTMI_PHY_DATAPATH_CTRL_OVERRIDE_EN BIT(0) +#define UTMI_PHY_CMN_CTRL_OVERRIDE_EN BIT(1) + +#define USB2_PHY_USB_PHY_REFCLK_CTRL (0xa0) +#define REFCLK_SEL_MASK GENMASK(1, 0) +#define REFCLK_SEL_DEFAULT (0x2 << 0) + +#define HS_DISCONNECT_MASK GENMASK(2, 0) +#define SQUELCH_DETECTOR_MASK GENMASK(7, 5) + +#define HS_AMPLITUDE_MASK GENMASK(3, 0) +#define PREEMPHASIS_DURATION_MASK BIT(5) +#define PREEMPHASIS_AMPLITUDE_MASK GENMASK(7, 6) + +#define HS_RISE_FALL_MASK GENMASK(1, 0) +#define HS_CROSSOVER_VOLTAGE_MASK GENMASK(3, 2) +#define HS_OUTPUT_IMPEDANCE_MASK GENMASK(5, 4) + +#define LS_FS_OUTPUT_IMPEDANCE_MASK GENMASK(3, 0) + +#define SNPS_HS_NUM_VREGS ARRAY_SIZE(hs_7nm_vreg_names) + +struct override_param { + s32 value; + u8 reg_val; +}; + +struct override_param_map { + const char *prop_name; + const struct override_param *param_table; + u8 table_size; + u8 reg_offset; + u8 param_mask; +}; + +struct phy_override_seq { + bool need_update; + u8 offset; + u8 value; + u8 mask; +}; + +#define NUM_HSPHY_TUNING_PARAMS (9) + +/* struct hs_7nm_phy_cfg - per-PHY initialization config */ +struct hs_7nm_phy_cfg { + /* resets to be requested */ + struct reset_ctl *resets; + int num_resets; + + struct override_param_map *map_cfg; + struct phy_override_seq update_seq_cfg[NUM_HSPHY_TUNING_PARAMS]; +}; + +/** + * struct hs_7nm_phy_priv - snps hs phy attributes + */ +struct hs_7nm_phy_priv { + void __iomem *base; + + /* clocks to be requested */ + struct clk_bulk clks; + + /* resets to be requested */ + struct reset_ctl_bulk resets; + + struct hs_7nm_phy_cfg *cfg; +}; + +static inline void hs_7nm_write_mask(void __iomem *base, u32 offset, u32 mask, + u32 val) +{ + u32 reg; + + reg = readl_relaxed(base + offset); + + reg &= ~mask; + reg |= val & mask; + writel_relaxed(reg, base + offset); + + /* Ensure above write is completed */ + readl_relaxed(base + offset); +} + +static int hs_7nm_usb_init(struct phy *phy) +{ + struct hs_7nm_phy_priv *hs_7nm = dev_get_priv(phy->dev); + + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_CFG0, + UTMI_PHY_CMN_CTRL_OVERRIDE_EN, + UTMI_PHY_CMN_CTRL_OVERRIDE_EN); + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_UTMI_CTRL5, POR, POR); + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON0, + FSEL_MASK, 0); + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON1, + PLLBTUNE, PLLBTUNE); + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_REFCLK_CTRL, + REFCLK_SEL_DEFAULT, REFCLK_SEL_MASK); + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON1, + VBUSVLDEXTSEL0, VBUSVLDEXTSEL0); + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_HS_PHY_CTRL1, + VBUSVLDEXT0, VBUSVLDEXT0); + + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON2, + VREGBYPASS, VREGBYPASS); + + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_HS_PHY_CTRL2, + USB2_SUSPEND_N_SEL | USB2_SUSPEND_N, + USB2_SUSPEND_N_SEL | USB2_SUSPEND_N); + + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_UTMI_CTRL0, SLEEPM, + SLEEPM); + + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON0, + SIDDQ, 0); + + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_UTMI_CTRL5, POR, 0); + + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_HS_PHY_CTRL2, + USB2_SUSPEND_N_SEL, 0); + + hs_7nm_write_mask(hs_7nm->base, USB2_PHY_USB_PHY_CFG0, + UTMI_PHY_CMN_CTRL_OVERRIDE_EN, 0); + + return 0; +} + +static int hs_7nm_phy_power_on(struct phy *phy) +{ + struct hs_7nm_phy_priv *hs_7nm = dev_get_priv(phy->dev); + int ret; + + clk_enable_bulk(&hs_7nm->clks); + + ret = reset_deassert_bulk(&hs_7nm->resets); + if (ret) + return ret; + + ret = hs_7nm_usb_init(phy); + if (ret) + return ret; + + return 0; +} + +static int hs_7nm_phy_power_off(struct phy *phy) +{ + struct hs_7nm_phy_priv *hs_7nm = dev_get_priv(phy->dev); + + reset_assert_bulk(&hs_7nm->resets); + clk_disable_bulk(&hs_7nm->clks); + + return 0; +} + +static int hs_7nm_phy_clk_init(struct udevice *dev, + struct hs_7nm_phy_priv *hs_7nm) +{ + int ret; + + ret = clk_get_bulk(dev, &hs_7nm->clks); + /* We may have no clocks */ + if (ret == -ENOENT) { + debug("%s: no clocks\n", __func__); + return 0; + } + if (ret < 0) { + printf("%s: Failed to get clocks %d\n", __func__, ret); + return ret; + } + + return 0; +} + +static int hs_7nm_phy_probe(struct udevice *dev) +{ + struct hs_7nm_phy_priv *hs_7nm = dev_get_priv(dev); + int ret; + + hs_7nm->base = (void __iomem *)dev_read_addr(dev); + if (IS_ERR(hs_7nm->base)) + return PTR_ERR(hs_7nm->base); + + hs_7nm->cfg = (struct hs_7nm_phy_cfg *)dev_get_driver_data(dev); + + ret = hs_7nm_phy_clk_init(dev, hs_7nm); + if (ret) { + printf("%s: hs_7nm_phy_clk_init %d\n", __func__, ret); + return ret; + } + + ret = reset_get_bulk(dev, &hs_7nm->resets); + if (ret < 0) { + printf("failed to get resets, ret = %d\n", ret); + return ret; + } + + clk_enable_bulk(&hs_7nm->clks); + reset_deassert_bulk(&hs_7nm->resets); + + return 0; +} + +static struct phy_ops hs_7nm_phy_ops = { + .power_on = hs_7nm_phy_power_on, + .power_off = hs_7nm_phy_power_off, +}; + +static const struct udevice_id hs_7nm_phy_ids[] = { + { + .compatible = "qcom,sm8150-usb-hs-phy", + }, + { + .compatible = "qcom,usb-snps-hs-5nm-phy", + }, + { + .compatible = "qcom,usb-snps-hs-7nm-phy", + }, + { + .compatible = "qcom,usb-snps-femto-v2-phy", + }, + {} +}; + +U_BOOT_DRIVER(qcom_usb_hs_7nm) = { + .name = "qcom-usb-hs-7nm", + .id = UCLASS_PHY, + .of_match = hs_7nm_phy_ids, + .ops = &hs_7nm_phy_ops, + .probe = hs_7nm_phy_probe, + .priv_auto = sizeof(struct hs_7nm_phy_priv), +};