Add a driver for the new Synopsys eUSB2 PHY found in the SM8550 and SM8650 SoCs.

Signed-off-by: Neil Armstrong neil.armstrong@linaro.org --- drivers/phy/qcom/Kconfig | 8 + drivers/phy/qcom/Makefile | 1 + drivers/phy/qcom/phy-qcom-snps-eusb2.c | 366 +++++++++++++++++++++++++++++++++ 3 files changed, 375 insertions(+)

diff --git a/drivers/phy/qcom/Kconfig b/drivers/phy/qcom/Kconfig index b9fe608c279..3aae1813352 100644 --- a/drivers/phy/qcom/Kconfig +++ b/drivers/phy/qcom/Kconfig @@ -27,6 +27,14 @@ config PHY_QCOM_USB_SNPS_FEMTO_V2 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_SNPS_EUSB2 + tristate "Qualcomm Synopsys eUSB2 High-Speed PHY" + depends on PHY && ARCH_SNAPDRAGON + help + Enable this to support the Qualcomm Synopsys DesignWare eUSB2 + 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 diff --git a/drivers/phy/qcom/Makefile b/drivers/phy/qcom/Makefile index 5f4db4a5378..a5153061dfb 100644 --- a/drivers/phy/qcom/Makefile +++ b/drivers/phy/qcom/Makefile @@ -2,5 +2,6 @@ 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_SNPS_FEMTO_V2) += phy-qcom-snps-femto-v2.o +obj-$(CONFIG_PHY_QCOM_SNPS_EUSB2) += phy-qcom-snps-eusb2.o obj-$(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-snps-eusb2.c b/drivers/phy/qcom/phy-qcom-snps-eusb2.c new file mode 100644 index 00000000000..b2655ac007c --- /dev/null +++ b/drivers/phy/qcom/phy-qcom-snps-eusb2.c @@ -0,0 +1,366 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2023-2024, Linaro Limited + * + * Based on the Linux phy-qcom-snps-eusb2.c 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/bitfield.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> + +#define USB_PHY_UTMI_CTRL0 (0x3c) +#define SLEEPM BIT(0) +#define OPMODE_MASK GENMASK(4, 3) +#define OPMODE_NONDRIVING BIT(3) + +#define USB_PHY_UTMI_CTRL5 (0x50) +#define POR BIT(1) + +#define USB_PHY_HS_PHY_CTRL_COMMON0 (0x54) +#define PHY_ENABLE BIT(0) +#define SIDDQ_SEL BIT(1) +#define SIDDQ BIT(2) +#define RETENABLEN BIT(3) +#define FSEL_MASK GENMASK(6, 4) +#define FSEL_19_2_MHZ_VAL (0x0) +#define FSEL_38_4_MHZ_VAL (0x4) + +#define USB_PHY_CFG_CTRL_1 (0x58) +#define PHY_CFG_PLL_CPBIAS_CNTRL_MASK GENMASK(7, 1) + +#define USB_PHY_CFG_CTRL_2 (0x5c) +#define PHY_CFG_PLL_FB_DIV_7_0_MASK GENMASK(7, 0) +#define DIV_7_0_19_2_MHZ_VAL (0x90) +#define DIV_7_0_38_4_MHZ_VAL (0xc8) + +#define USB_PHY_CFG_CTRL_3 (0x60) +#define PHY_CFG_PLL_FB_DIV_11_8_MASK GENMASK(3, 0) +#define DIV_11_8_19_2_MHZ_VAL (0x1) +#define DIV_11_8_38_4_MHZ_VAL (0x0) + +#define PHY_CFG_PLL_REF_DIV GENMASK(7, 4) +#define PLL_REF_DIV_VAL (0x0) + +#define USB_PHY_HS_PHY_CTRL2 (0x64) +#define VBUSVLDEXT0 BIT(0) +#define USB2_SUSPEND_N BIT(2) +#define USB2_SUSPEND_N_SEL BIT(3) +#define VBUS_DET_EXT_SEL BIT(4) + +#define USB_PHY_CFG_CTRL_4 (0x68) +#define PHY_CFG_PLL_GMP_CNTRL_MASK GENMASK(1, 0) +#define PHY_CFG_PLL_INT_CNTRL_MASK GENMASK(7, 2) + +#define USB_PHY_CFG_CTRL_5 (0x6c) +#define PHY_CFG_PLL_PROP_CNTRL_MASK GENMASK(4, 0) +#define PHY_CFG_PLL_VREF_TUNE_MASK GENMASK(7, 6) + +#define USB_PHY_CFG_CTRL_6 (0x70) +#define PHY_CFG_PLL_VCO_CNTRL_MASK GENMASK(2, 0) + +#define USB_PHY_CFG_CTRL_7 (0x74) + +#define USB_PHY_CFG_CTRL_8 (0x78) +#define PHY_CFG_TX_FSLS_VREF_TUNE_MASK GENMASK(1, 0) +#define PHY_CFG_TX_FSLS_VREG_BYPASS BIT(2) +#define PHY_CFG_TX_HS_VREF_TUNE_MASK GENMASK(5, 3) +#define PHY_CFG_TX_HS_XV_TUNE_MASK GENMASK(7, 6) + +#define USB_PHY_CFG_CTRL_9 (0x7c) +#define PHY_CFG_TX_PREEMP_TUNE_MASK GENMASK(2, 0) +#define PHY_CFG_TX_RES_TUNE_MASK GENMASK(4, 3) +#define PHY_CFG_TX_RISE_TUNE_MASK GENMASK(6, 5) +#define PHY_CFG_RCAL_BYPASS BIT(7) + +#define USB_PHY_CFG_CTRL_10 (0x80) + +#define USB_PHY_CFG0 (0x94) +#define DATAPATH_CTRL_OVERRIDE_EN BIT(0) +#define CMN_CTRL_OVERRIDE_EN BIT(1) + +#define UTMI_PHY_CMN_CTRL0 (0x98) +#define TESTBURNIN BIT(6) + +#define USB_PHY_FSEL_SEL (0xb8) +#define FSEL_SEL BIT(0) + +#define USB_PHY_APB_ACCESS_CMD (0x130) +#define RW_ACCESS BIT(0) +#define APB_START_CMD BIT(1) +#define APB_LOGIC_RESET BIT(2) + +#define USB_PHY_APB_ACCESS_STATUS (0x134) +#define ACCESS_DONE BIT(0) +#define TIMED_OUT BIT(1) +#define ACCESS_ERROR BIT(2) +#define ACCESS_IN_PROGRESS BIT(3) + +#define USB_PHY_APB_ADDRESS (0x138) +#define APB_REG_ADDR_MASK GENMASK(7, 0) + +#define USB_PHY_APB_WRDATA_LSB (0x13c) +#define APB_REG_WRDATA_7_0_MASK GENMASK(3, 0) + +#define USB_PHY_APB_WRDATA_MSB (0x140) +#define APB_REG_WRDATA_15_8_MASK GENMASK(7, 4) + +#define USB_PHY_APB_RDDATA_LSB (0x144) +#define APB_REG_RDDATA_7_0_MASK GENMASK(3, 0) + +#define USB_PHY_APB_RDDATA_MSB (0x148) +#define APB_REG_RDDATA_15_8_MASK GENMASK(7, 4) + +struct qcom_snps_eusb2_phy_priv { + void __iomem *base; + struct clk *ref_clk; + struct reset_ctl_bulk resets; +}; + +static void qcom_snps_eusb2_hsphy_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 void qcom_eusb2_default_parameters(struct qcom_snps_eusb2_phy_priv *qcom_snps_eusb2) +{ + /* default parameters: tx pre-emphasis */ + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_9, + PHY_CFG_TX_PREEMP_TUNE_MASK, + FIELD_PREP(PHY_CFG_TX_PREEMP_TUNE_MASK, 0)); + + /* tx rise/fall time */ + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_9, + PHY_CFG_TX_RISE_TUNE_MASK, + FIELD_PREP(PHY_CFG_TX_RISE_TUNE_MASK, 0x2)); + + /* source impedance adjustment */ + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_9, + PHY_CFG_TX_RES_TUNE_MASK, + FIELD_PREP(PHY_CFG_TX_RES_TUNE_MASK, 0x1)); + + /* dc voltage level adjustement */ + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_8, + PHY_CFG_TX_HS_VREF_TUNE_MASK, + FIELD_PREP(PHY_CFG_TX_HS_VREF_TUNE_MASK, 0x3)); + + /* transmitter HS crossover adjustement */ + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_8, + PHY_CFG_TX_HS_XV_TUNE_MASK, + FIELD_PREP(PHY_CFG_TX_HS_XV_TUNE_MASK, 0x0)); +} + +static int qcom_eusb2_ref_clk_init(struct qcom_snps_eusb2_phy_priv *qcom_snps_eusb2) +{ + unsigned long ref_clk_freq = clk_get_rate(qcom_snps_eusb2->ref_clk); + + switch (ref_clk_freq) { + case 19200000: + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_HS_PHY_CTRL_COMMON0, + FSEL_MASK, + FIELD_PREP(FSEL_MASK, FSEL_19_2_MHZ_VAL)); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_2, + PHY_CFG_PLL_FB_DIV_7_0_MASK, + DIV_7_0_19_2_MHZ_VAL); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_3, + PHY_CFG_PLL_FB_DIV_11_8_MASK, + DIV_11_8_19_2_MHZ_VAL); + break; + + case 38400000: + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_HS_PHY_CTRL_COMMON0, + FSEL_MASK, + FIELD_PREP(FSEL_MASK, FSEL_38_4_MHZ_VAL)); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_2, + PHY_CFG_PLL_FB_DIV_7_0_MASK, + DIV_7_0_38_4_MHZ_VAL); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_3, + PHY_CFG_PLL_FB_DIV_11_8_MASK, + DIV_11_8_38_4_MHZ_VAL); + break; + + default: + printf("%s: unsupported ref_clk_freq:%lu\n", __func__, ref_clk_freq); + return -EINVAL; + } + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_3, + PHY_CFG_PLL_REF_DIV, PLL_REF_DIV_VAL); + + return 0; +} + +static int qcom_snps_eusb2_usb_init(struct phy *phy) +{ + struct qcom_snps_eusb2_phy_priv *qcom_snps_eusb2 = dev_get_priv(phy->dev); + int ret; + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG0, + CMN_CTRL_OVERRIDE_EN, CMN_CTRL_OVERRIDE_EN); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_UTMI_CTRL5, POR, POR); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_HS_PHY_CTRL_COMMON0, + PHY_ENABLE | RETENABLEN, PHY_ENABLE | RETENABLEN); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_APB_ACCESS_CMD, + APB_LOGIC_RESET, APB_LOGIC_RESET); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, UTMI_PHY_CMN_CTRL0, TESTBURNIN, 0); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_FSEL_SEL, + FSEL_SEL, FSEL_SEL); + + /* update ref_clk related registers */ + ret = qcom_eusb2_ref_clk_init(qcom_snps_eusb2); + if (ret) + return ret; + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_1, + PHY_CFG_PLL_CPBIAS_CNTRL_MASK, + FIELD_PREP(PHY_CFG_PLL_CPBIAS_CNTRL_MASK, 0x1)); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_4, + PHY_CFG_PLL_INT_CNTRL_MASK, + FIELD_PREP(PHY_CFG_PLL_INT_CNTRL_MASK, 0x8)); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_4, + PHY_CFG_PLL_GMP_CNTRL_MASK, + FIELD_PREP(PHY_CFG_PLL_GMP_CNTRL_MASK, 0x1)); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_5, + PHY_CFG_PLL_PROP_CNTRL_MASK, + FIELD_PREP(PHY_CFG_PLL_PROP_CNTRL_MASK, 0x10)); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_6, + PHY_CFG_PLL_VCO_CNTRL_MASK, + FIELD_PREP(PHY_CFG_PLL_VCO_CNTRL_MASK, 0x0)); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_CFG_CTRL_5, + PHY_CFG_PLL_VREF_TUNE_MASK, + FIELD_PREP(PHY_CFG_PLL_VREF_TUNE_MASK, 0x1)); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_HS_PHY_CTRL2, + VBUS_DET_EXT_SEL, VBUS_DET_EXT_SEL); + + /* set default parameters */ + qcom_eusb2_default_parameters(qcom_snps_eusb2); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_HS_PHY_CTRL2, + USB2_SUSPEND_N_SEL | USB2_SUSPEND_N, + USB2_SUSPEND_N_SEL | USB2_SUSPEND_N); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_UTMI_CTRL0, SLEEPM, SLEEPM); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_HS_PHY_CTRL_COMMON0, + SIDDQ_SEL, SIDDQ_SEL); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_HS_PHY_CTRL_COMMON0, + SIDDQ, 0); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_UTMI_CTRL5, POR, 0); + + qcom_snps_eusb2_hsphy_write_mask(qcom_snps_eusb2->base, USB_PHY_HS_PHY_CTRL2, + USB2_SUSPEND_N_SEL, 0); + + return 0; +} + +static int qcom_snps_eusb2_phy_power_on(struct phy *phy) +{ + struct qcom_snps_eusb2_phy_priv *qcom_snps_eusb2 = dev_get_priv(phy->dev); + int ret; + + /* TODO Repeater */ + + clk_prepare_enable(qcom_snps_eusb2->ref_clk); + + ret = reset_deassert_bulk(&qcom_snps_eusb2->resets); + if (ret) + return ret; + + ret = qcom_snps_eusb2_usb_init(phy); + if (ret) + return ret; + + return 0; +} + +static int qcom_snps_eusb2_phy_power_off(struct phy *phy) +{ + struct qcom_snps_eusb2_phy_priv *qcom_snps_eusb2 = dev_get_priv(phy->dev); + + reset_assert_bulk(&qcom_snps_eusb2->resets); + clk_disable_unprepare(qcom_snps_eusb2->ref_clk); + + return 0; +} + +static int qcom_snps_eusb2_phy_probe(struct udevice *dev) +{ + struct qcom_snps_eusb2_phy_priv *qcom_snps_eusb2 = dev_get_priv(dev); + int ret; + + qcom_snps_eusb2->base = (void __iomem *)dev_read_addr(dev); + if (IS_ERR(qcom_snps_eusb2->base)) + return PTR_ERR(qcom_snps_eusb2->base); + + qcom_snps_eusb2->ref_clk = devm_clk_get(dev, "ref"); + if (IS_ERR(qcom_snps_eusb2->ref_clk)) { + printf("%s: failed to get ref clk %d\n", __func__, ret); + return PTR_ERR(qcom_snps_eusb2->ref_clk); + } + + ret = reset_get_bulk(dev, &qcom_snps_eusb2->resets); + if (ret < 0) { + printf("failed to get resets, ret = %d\n", ret); + return ret; + } + + return 0; +} + +static struct phy_ops qcom_snps_eusb2_phy_ops = { + .power_on = qcom_snps_eusb2_phy_power_on, + .power_off = qcom_snps_eusb2_phy_power_off, +}; + +static const struct udevice_id qcom_snps_eusb2_phy_ids[] = { + { + .compatible = "qcom,sm8550-snps-eusb2-phy", + }, + {} +}; + +U_BOOT_DRIVER(qcom_usb_qcom_snps_eusb2) = { + .name = "qcom-snps-eusb2-hsphy", + .id = UCLASS_PHY, + .of_match = qcom_snps_eusb2_phy_ids, + .ops = &qcom_snps_eusb2_phy_ops, + .probe = qcom_snps_eusb2_phy_probe, + .priv_auto = sizeof(struct qcom_snps_eusb2_phy_priv), +};