From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/phy/qualcomm/phy-qcom-snps-eusb2.c | 442 +++++++++++++++++++++++++++++ 1 file changed, 442 insertions(+) create mode 100644 drivers/phy/qualcomm/phy-qcom-snps-eusb2.c (limited to 'drivers/phy/qualcomm/phy-qcom-snps-eusb2.c') diff --git a/drivers/phy/qualcomm/phy-qcom-snps-eusb2.c b/drivers/phy/qualcomm/phy-qcom-snps-eusb2.c new file mode 100644 index 0000000000..1484691a41 --- /dev/null +++ b/drivers/phy/qualcomm/phy-qcom-snps-eusb2.c @@ -0,0 +1,442 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2023, Linaro Limited + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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) + +static const char * const eusb2_hsphy_vreg_names[] = { + "vdd", "vdda12", +}; + +#define EUSB2_NUM_VREGS ARRAY_SIZE(eusb2_hsphy_vreg_names) + +struct qcom_snps_eusb2_hsphy { + struct phy *phy; + void __iomem *base; + + struct clk *ref_clk; + struct reset_control *phy_reset; + + struct regulator_bulk_data vregs[EUSB2_NUM_VREGS]; + + enum phy_mode mode; + + struct phy *repeater; +}; + +static int qcom_snps_eusb2_hsphy_set_mode(struct phy *p, enum phy_mode mode, int submode) +{ + struct qcom_snps_eusb2_hsphy *phy = phy_get_drvdata(p); + + phy->mode = mode; + + return phy_set_mode_ext(phy->repeater, mode, submode); +} + +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_hsphy *phy) +{ + /* default parameters: tx pre-emphasis */ + qcom_snps_eusb2_hsphy_write_mask(phy->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(phy->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(phy->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(phy->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(phy->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_hsphy *phy) +{ + unsigned long ref_clk_freq = clk_get_rate(phy->ref_clk); + + switch (ref_clk_freq) { + case 19200000: + qcom_snps_eusb2_hsphy_write_mask(phy->base, USB_PHY_HS_PHY_CTRL_COMMON0, + FSEL_MASK, + FIELD_PREP(FSEL_MASK, FSEL_19_2_MHZ_VAL)); + + qcom_snps_eusb2_hsphy_write_mask(phy->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(phy->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(phy->base, USB_PHY_HS_PHY_CTRL_COMMON0, + FSEL_MASK, + FIELD_PREP(FSEL_MASK, FSEL_38_4_MHZ_VAL)); + + qcom_snps_eusb2_hsphy_write_mask(phy->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(phy->base, USB_PHY_CFG_CTRL_3, + PHY_CFG_PLL_FB_DIV_11_8_MASK, + DIV_11_8_38_4_MHZ_VAL); + break; + + default: + dev_err(&phy->phy->dev, "unsupported ref_clk_freq:%lu\n", ref_clk_freq); + return -EINVAL; + } + + qcom_snps_eusb2_hsphy_write_mask(phy->base, USB_PHY_CFG_CTRL_3, + PHY_CFG_PLL_REF_DIV, PLL_REF_DIV_VAL); + + return 0; +} + +static int qcom_snps_eusb2_hsphy_init(struct phy *p) +{ + struct qcom_snps_eusb2_hsphy *phy = phy_get_drvdata(p); + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(phy->vregs), phy->vregs); + if (ret) + return ret; + + ret = phy_init(phy->repeater); + if (ret) { + dev_err(&p->dev, "repeater init failed. %d\n", ret); + goto disable_vreg; + } + + ret = clk_prepare_enable(phy->ref_clk); + if (ret) { + dev_err(&p->dev, "failed to enable ref clock, %d\n", ret); + goto disable_vreg; + } + + ret = reset_control_assert(phy->phy_reset); + if (ret) { + dev_err(&p->dev, "failed to assert phy_reset, %d\n", ret); + goto disable_ref_clk; + } + + usleep_range(100, 150); + + ret = reset_control_deassert(phy->phy_reset); + if (ret) { + dev_err(&p->dev, "failed to de-assert phy_reset, %d\n", ret); + goto disable_ref_clk; + } + + qcom_snps_eusb2_hsphy_write_mask(phy->base, USB_PHY_CFG0, + CMN_CTRL_OVERRIDE_EN, CMN_CTRL_OVERRIDE_EN); + + qcom_snps_eusb2_hsphy_write_mask(phy->base, USB_PHY_UTMI_CTRL5, POR, POR); + + qcom_snps_eusb2_hsphy_write_mask(phy->base, USB_PHY_HS_PHY_CTRL_COMMON0, + PHY_ENABLE | RETENABLEN, PHY_ENABLE | RETENABLEN); + + qcom_snps_eusb2_hsphy_write_mask(phy->base, USB_PHY_APB_ACCESS_CMD, + APB_LOGIC_RESET, APB_LOGIC_RESET); + + qcom_snps_eusb2_hsphy_write_mask(phy->base, UTMI_PHY_CMN_CTRL0, TESTBURNIN, 0); + + qcom_snps_eusb2_hsphy_write_mask(phy->base, USB_PHY_FSEL_SEL, + FSEL_SEL, FSEL_SEL); + + /* update ref_clk related registers */ + ret = qcom_eusb2_ref_clk_init(phy); + if (ret) + goto disable_ref_clk; + + qcom_snps_eusb2_hsphy_write_mask(phy->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(phy->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(phy->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(phy->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(phy->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(phy->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(phy->base, USB_PHY_HS_PHY_CTRL2, + VBUS_DET_EXT_SEL, VBUS_DET_EXT_SEL); + + /* set default parameters */ + qcom_eusb2_default_parameters(phy); + + qcom_snps_eusb2_hsphy_write_mask(phy->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(phy->base, USB_PHY_UTMI_CTRL0, SLEEPM, SLEEPM); + + qcom_snps_eusb2_hsphy_write_mask(phy->base, USB_PHY_HS_PHY_CTRL_COMMON0, + SIDDQ_SEL, SIDDQ_SEL); + + qcom_snps_eusb2_hsphy_write_mask(phy->base, USB_PHY_HS_PHY_CTRL_COMMON0, + SIDDQ, 0); + + qcom_snps_eusb2_hsphy_write_mask(phy->base, USB_PHY_UTMI_CTRL5, POR, 0); + + qcom_snps_eusb2_hsphy_write_mask(phy->base, USB_PHY_HS_PHY_CTRL2, + USB2_SUSPEND_N_SEL, 0); + + return 0; + +disable_ref_clk: + clk_disable_unprepare(phy->ref_clk); + +disable_vreg: + regulator_bulk_disable(ARRAY_SIZE(phy->vregs), phy->vregs); + + return ret; +} + +static int qcom_snps_eusb2_hsphy_exit(struct phy *p) +{ + struct qcom_snps_eusb2_hsphy *phy = phy_get_drvdata(p); + + clk_disable_unprepare(phy->ref_clk); + + regulator_bulk_disable(ARRAY_SIZE(phy->vregs), phy->vregs); + + phy_exit(phy->repeater); + + return 0; +} + +static const struct phy_ops qcom_snps_eusb2_hsphy_ops = { + .init = qcom_snps_eusb2_hsphy_init, + .exit = qcom_snps_eusb2_hsphy_exit, + .set_mode = qcom_snps_eusb2_hsphy_set_mode, + .owner = THIS_MODULE, +}; + +static int qcom_snps_eusb2_hsphy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct qcom_snps_eusb2_hsphy *phy; + struct phy_provider *phy_provider; + struct phy *generic_phy; + int ret, i; + int num; + + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return -ENOMEM; + + phy->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(phy->base)) + return PTR_ERR(phy->base); + + phy->phy_reset = devm_reset_control_get_exclusive(dev, NULL); + if (IS_ERR(phy->phy_reset)) + return PTR_ERR(phy->phy_reset); + + phy->ref_clk = devm_clk_get(dev, "ref"); + if (IS_ERR(phy->ref_clk)) + return dev_err_probe(dev, PTR_ERR(phy->ref_clk), + "failed to get ref clk\n"); + + num = ARRAY_SIZE(phy->vregs); + for (i = 0; i < num; i++) + phy->vregs[i].supply = eusb2_hsphy_vreg_names[i]; + + ret = devm_regulator_bulk_get(dev, num, phy->vregs); + if (ret) + return dev_err_probe(dev, ret, + "failed to get regulator supplies\n"); + + phy->repeater = devm_of_phy_get_by_index(dev, np, 0); + if (IS_ERR(phy->repeater)) + return dev_err_probe(dev, PTR_ERR(phy->repeater), + "failed to get repeater\n"); + + generic_phy = devm_phy_create(dev, NULL, &qcom_snps_eusb2_hsphy_ops); + if (IS_ERR(generic_phy)) { + dev_err(dev, "failed to create phy %d\n", ret); + return PTR_ERR(generic_phy); + } + + dev_set_drvdata(dev, phy); + phy_set_drvdata(generic_phy, phy); + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(phy_provider)) + return PTR_ERR(phy_provider); + + dev_info(dev, "Registered Qcom-eUSB2 phy\n"); + + return 0; +} + +static const struct of_device_id qcom_snps_eusb2_hsphy_of_match_table[] = { + { .compatible = "qcom,sm8550-snps-eusb2-phy", }, + { }, +}; +MODULE_DEVICE_TABLE(of, qcom_snps_eusb2_hsphy_of_match_table); + +static struct platform_driver qcom_snps_eusb2_hsphy_driver = { + .probe = qcom_snps_eusb2_hsphy_probe, + .driver = { + .name = "qcom-snps-eusb2-hsphy", + .of_match_table = qcom_snps_eusb2_hsphy_of_match_table, + }, +}; + +module_platform_driver(qcom_snps_eusb2_hsphy_driver); +MODULE_DESCRIPTION("Qualcomm SNPS eUSB2 HS PHY driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3