| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Wesley Cheng | 1168 | 100.00% | 1 | 100.00% |
| Total | 1168 | 1 |
// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2020, The Linux Foundation. All rights reserved. */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/reset.h> #include <linux/slab.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 RETENABLEN BIT(3) #define FSEL_MASK GENMASK(7, 5) #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_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) static const char * const qcom_snps_hsphy_vreg_names[] = { "vdda-pll", "vdda33", "vdda18", }; #define SNPS_HS_NUM_VREGS ARRAY_SIZE(qcom_snps_hsphy_vreg_names) /** * struct qcom_snps_hsphy - snps hs phy attributes * * @phy: generic phy * @base: iomapped memory space for snps hs phy * * @cfg_ahb_clk: AHB2PHY interface clock * @ref_clk: phy reference clock * @iface_clk: phy interface clock * @phy_reset: phy reset control * @vregs: regulator supplies bulk data * @phy_initialized: if PHY has been initialized correctly */ struct qcom_snps_hsphy { struct phy *phy; void __iomem *base; struct clk *cfg_ahb_clk; struct clk *ref_clk; struct reset_control *phy_reset; struct regulator_bulk_data vregs[SNPS_HS_NUM_VREGS]; bool phy_initialized; }; static inline void qcom_snps_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 int qcom_snps_hsphy_init(struct phy *phy) { struct qcom_snps_hsphy *hsphy = phy_get_drvdata(phy); int ret; dev_vdbg(&phy->dev, "%s(): Initializing SNPS HS phy\n", __func__); ret = regulator_bulk_enable(ARRAY_SIZE(hsphy->vregs), hsphy->vregs); if (ret) return ret; ret = clk_prepare_enable(hsphy->cfg_ahb_clk); if (ret) { dev_err(&phy->dev, "failed to enable cfg ahb clock, %d\n", ret); goto poweroff_phy; } ret = reset_control_assert(hsphy->phy_reset); if (ret) { dev_err(&phy->dev, "failed to assert phy_reset, %d\n", ret); goto disable_ahb_clk; } usleep_range(100, 150); ret = reset_control_deassert(hsphy->phy_reset); if (ret) { dev_err(&phy->dev, "failed to de-assert phy_reset, %d\n", ret); goto disable_ahb_clk; } qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_CFG0, UTMI_PHY_CMN_CTRL_OVERRIDE_EN, UTMI_PHY_CMN_CTRL_OVERRIDE_EN); qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_UTMI_CTRL5, POR, POR); qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON0, FSEL_MASK, 0); qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON1, PLLBTUNE, PLLBTUNE); qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_REFCLK_CTRL, REFCLK_SEL_DEFAULT, REFCLK_SEL_MASK); qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON1, VBUSVLDEXTSEL0, VBUSVLDEXTSEL0); qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL1, VBUSVLDEXT0, VBUSVLDEXT0); qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON2, VREGBYPASS, VREGBYPASS); qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL2, USB2_SUSPEND_N_SEL | USB2_SUSPEND_N, USB2_SUSPEND_N_SEL | USB2_SUSPEND_N); qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_UTMI_CTRL0, SLEEPM, SLEEPM); qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_UTMI_CTRL5, POR, 0); qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL2, USB2_SUSPEND_N_SEL, 0); qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_CFG0, UTMI_PHY_CMN_CTRL_OVERRIDE_EN, 0); hsphy->phy_initialized = true; return 0; disable_ahb_clk: clk_disable_unprepare(hsphy->cfg_ahb_clk); poweroff_phy: regulator_bulk_disable(ARRAY_SIZE(hsphy->vregs), hsphy->vregs); return ret; } static int qcom_snps_hsphy_exit(struct phy *phy) { struct qcom_snps_hsphy *hsphy = phy_get_drvdata(phy); reset_control_assert(hsphy->phy_reset); clk_disable_unprepare(hsphy->cfg_ahb_clk); regulator_bulk_disable(ARRAY_SIZE(hsphy->vregs), hsphy->vregs); hsphy->phy_initialized = false; return 0; } static const struct phy_ops qcom_snps_hsphy_gen_ops = { .init = qcom_snps_hsphy_init, .exit = qcom_snps_hsphy_exit, .owner = THIS_MODULE, }; static const struct of_device_id qcom_snps_hsphy_of_match_table[] = { { .compatible = "qcom,sm8150-usb-hs-phy", }, { .compatible = "qcom,usb-snps-hs-7nm-phy", }, { .compatible = "qcom,usb-snps-femto-v2-phy", }, { } }; MODULE_DEVICE_TABLE(of, qcom_snps_hsphy_of_match_table); static int qcom_snps_hsphy_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct qcom_snps_hsphy *hsphy; struct phy_provider *phy_provider; struct phy *generic_phy; int ret, i; int num; hsphy = devm_kzalloc(dev, sizeof(*hsphy), GFP_KERNEL); if (!hsphy) return -ENOMEM; hsphy->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(hsphy->base)) return PTR_ERR(hsphy->base); hsphy->ref_clk = devm_clk_get(dev, "ref"); if (IS_ERR(hsphy->ref_clk)) { ret = PTR_ERR(hsphy->ref_clk); if (ret != -EPROBE_DEFER) dev_err(dev, "failed to get ref clk, %d\n", ret); return ret; } hsphy->phy_reset = devm_reset_control_get_exclusive(&pdev->dev, NULL); if (IS_ERR(hsphy->phy_reset)) { dev_err(dev, "failed to get phy core reset\n"); return PTR_ERR(hsphy->phy_reset); } num = ARRAY_SIZE(hsphy->vregs); for (i = 0; i < num; i++) hsphy->vregs[i].supply = qcom_snps_hsphy_vreg_names[i]; ret = devm_regulator_bulk_get(dev, num, hsphy->vregs); if (ret) { if (ret != -EPROBE_DEFER) dev_err(dev, "failed to get regulator supplies: %d\n", ret); return ret; } generic_phy = devm_phy_create(dev, NULL, &qcom_snps_hsphy_gen_ops); if (IS_ERR(generic_phy)) { ret = PTR_ERR(generic_phy); dev_err(dev, "failed to create phy, %d\n", ret); return ret; } hsphy->phy = generic_phy; dev_set_drvdata(dev, hsphy); phy_set_drvdata(generic_phy, hsphy); phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); if (!IS_ERR(phy_provider)) dev_dbg(dev, "Registered Qcom-SNPS HS phy\n"); return PTR_ERR_OR_ZERO(phy_provider); } static struct platform_driver qcom_snps_hsphy_driver = { .probe = qcom_snps_hsphy_probe, .driver = { .name = "qcom-snps-hs-femto-v2-phy", .of_match_table = qcom_snps_hsphy_of_match_table, }, }; module_platform_driver(qcom_snps_hsphy_driver); MODULE_DESCRIPTION("Qualcomm SNPS FEMTO USB HS PHY V2 driver"); MODULE_LICENSE("GPL v2");
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