| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Xu Yang | 1862 | 100.00% | 2 | 100.00% |
| Total | 1862 | 2 |
// SPDX-License-Identifier: GPL-2.0 /* * dwc3-imx.c - NXP i.MX Soc USB3 Specific Glue layer * * Copyright 2026 NXP */ #include <linux/clk.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include "core.h" #include "glue.h" /* USB wakeup registers */ #define USB_WAKEUP_CTRL 0x00 /* Global wakeup interrupt enable, also used to clear interrupt */ #define USB_WAKEUP_EN BIT(31) /* Wakeup from connect or disconnect, only for superspeed */ #define USB_WAKEUP_SS_CONN BIT(5) /* 0 select vbus_valid, 1 select sessvld */ #define USB_WAKEUP_VBUS_SRC_SESS_VAL BIT(4) /* Enable signal for wake up from u3 state */ #define USB_WAKEUP_U3_EN BIT(3) /* Enable signal for wake up from id change */ #define USB_WAKEUP_ID_EN BIT(2) /* Enable signal for wake up from vbus change */ #define USB_WAKEUP_VBUS_EN BIT(1) /* Enable signal for wake up from dp/dm change */ #define USB_WAKEUP_DPDM_EN BIT(0) #define USB_WAKEUP_EN_MASK GENMASK(5, 0) /* USB glue registers */ #define USB_CTRL0 0x00 #define USB_CTRL1 0x04 #define USB_CTRL0_PORTPWR_EN BIT(12) /* 1 - PPC enabled (default) */ #define USB_CTRL0_USB3_FIXED BIT(22) /* 1 - USB3 permanent attached */ #define USB_CTRL0_USB2_FIXED BIT(23) /* 1 - USB2 permanent attached */ #define USB_CTRL1_OC_POLARITY BIT(16) /* 0 - HIGH / 1 - LOW */ #define USB_CTRL1_PWR_POLARITY BIT(17) /* 0 - HIGH / 1 - LOW */ struct dwc3_imx { struct dwc3 dwc; struct device *dev; void __iomem *blkctl_base; void __iomem *glue_base; struct clk *hsio_clk; struct clk *suspend_clk; int irq; bool pm_suspended; bool wakeup_pending; unsigned permanent_attached:1; unsigned disable_pwr_ctrl:1; unsigned overcur_active_low:1; unsigned power_active_low:1; }; #define to_dwc3_imx(d) container_of((d), struct dwc3_imx, dwc) static void dwc3_imx_get_property(struct dwc3_imx *dwc_imx) { struct device *dev = dwc_imx->dev; dwc_imx->permanent_attached = device_property_read_bool(dev, "fsl,permanently-attached"); dwc_imx->disable_pwr_ctrl = device_property_read_bool(dev, "fsl,disable-port-power-control"); dwc_imx->overcur_active_low = device_property_read_bool(dev, "fsl,over-current-active-low"); dwc_imx->power_active_low = device_property_read_bool(dev, "fsl,power-active-low"); } static void dwc3_imx_configure_glue(struct dwc3_imx *dwc_imx) { u32 value; if (!dwc_imx->glue_base) return; value = readl(dwc_imx->glue_base + USB_CTRL0); if (dwc_imx->permanent_attached) value |= USB_CTRL0_USB2_FIXED | USB_CTRL0_USB3_FIXED; else value &= ~(USB_CTRL0_USB2_FIXED | USB_CTRL0_USB3_FIXED); if (dwc_imx->disable_pwr_ctrl) value &= ~USB_CTRL0_PORTPWR_EN; else value |= USB_CTRL0_PORTPWR_EN; writel(value, dwc_imx->glue_base + USB_CTRL0); value = readl(dwc_imx->glue_base + USB_CTRL1); if (dwc_imx->overcur_active_low) value |= USB_CTRL1_OC_POLARITY; else value &= ~USB_CTRL1_OC_POLARITY; if (dwc_imx->power_active_low) value |= USB_CTRL1_PWR_POLARITY; else value &= ~USB_CTRL1_PWR_POLARITY; writel(value, dwc_imx->glue_base + USB_CTRL1); } static void dwc3_imx_wakeup_enable(struct dwc3_imx *dwc_imx, pm_message_t msg) { struct dwc3 *dwc = &dwc_imx->dwc; u32 val; val = readl(dwc_imx->blkctl_base + USB_WAKEUP_CTRL); if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST && dwc->xhci) { val |= USB_WAKEUP_EN | USB_WAKEUP_DPDM_EN; if (PMSG_IS_AUTO(msg)) val |= USB_WAKEUP_SS_CONN | USB_WAKEUP_U3_EN; } else { val |= USB_WAKEUP_EN | USB_WAKEUP_VBUS_EN | USB_WAKEUP_VBUS_SRC_SESS_VAL; } writel(val, dwc_imx->blkctl_base + USB_WAKEUP_CTRL); } static void dwc3_imx_wakeup_disable(struct dwc3_imx *dwc_imx) { u32 val; val = readl(dwc_imx->blkctl_base + USB_WAKEUP_CTRL); val &= ~(USB_WAKEUP_EN | USB_WAKEUP_EN_MASK); writel(val, dwc_imx->blkctl_base + USB_WAKEUP_CTRL); } static irqreturn_t dwc3_imx_interrupt(int irq, void *data) { struct dwc3_imx *dwc_imx = data; struct dwc3 *dwc = &dwc_imx->dwc; if (!dwc_imx->pm_suspended) return IRQ_HANDLED; disable_irq_nosync(dwc_imx->irq); dwc_imx->wakeup_pending = true; if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST && dwc->xhci) pm_runtime_resume(&dwc->xhci->dev); else if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE) pm_runtime_get(dwc->dev); return IRQ_HANDLED; } static void dwc3_imx_pre_set_role(struct dwc3 *dwc, enum usb_role role) { if (role == USB_ROLE_HOST) /* * For xhci host, we need disable dwc core auto * suspend, because during this auto suspend delay(5s), * xhci host RUN_STOP is cleared and wakeup is not * enabled, if device is inserted, xhci host can't * response the connection. */ pm_runtime_dont_use_autosuspend(dwc->dev); else pm_runtime_use_autosuspend(dwc->dev); } static struct dwc3_glue_ops dwc3_imx_glue_ops = { .pre_set_role = dwc3_imx_pre_set_role, }; static const struct property_entry dwc3_imx_properties[] = { PROPERTY_ENTRY_BOOL("xhci-missing-cas-quirk"), PROPERTY_ENTRY_BOOL("xhci-skip-phy-init-quirk"), {}, }; static const struct software_node dwc3_imx_swnode = { .properties = dwc3_imx_properties, }; static int dwc3_imx_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct dwc3_imx *dwc_imx; struct dwc3 *dwc; struct resource *res; const char *irq_name; struct dwc3_probe_data probe_data = {}; int ret, irq; dwc_imx = devm_kzalloc(dev, sizeof(*dwc_imx), GFP_KERNEL); if (!dwc_imx) return -ENOMEM; platform_set_drvdata(pdev, dwc_imx); dwc_imx->dev = dev; dwc3_imx_get_property(dwc_imx); dwc_imx->blkctl_base = devm_platform_ioremap_resource_byname(pdev, "blkctl"); if (IS_ERR(dwc_imx->blkctl_base)) return PTR_ERR(dwc_imx->blkctl_base); res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "glue"); if (!res) { dev_warn(dev, "Base address for glue layer missing\n"); } else { dwc_imx->glue_base = devm_ioremap_resource(dev, res); if (IS_ERR(dwc_imx->glue_base)) return PTR_ERR(dwc_imx->glue_base); } res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core"); if (!res) return dev_err_probe(dev, -ENODEV, "missing core memory resource\n"); dwc_imx->hsio_clk = devm_clk_get_enabled(dev, "hsio"); if (IS_ERR(dwc_imx->hsio_clk)) return dev_err_probe(dev, PTR_ERR(dwc_imx->hsio_clk), "Failed to get hsio clk\n"); dwc_imx->suspend_clk = devm_clk_get_enabled(dev, "suspend"); if (IS_ERR(dwc_imx->suspend_clk)) return dev_err_probe(dev, PTR_ERR(dwc_imx->suspend_clk), "Failed to get suspend clk\n"); irq = platform_get_irq_byname(pdev, "wakeup"); if (irq < 0) return irq; dwc_imx->irq = irq; irq_name = devm_kasprintf(dev, GFP_KERNEL, "%s:wakeup", dev_name(dev)); if (!irq_name) return dev_err_probe(dev, -ENOMEM, "failed to create irq_name\n"); ret = devm_request_threaded_irq(dev, irq, NULL, dwc3_imx_interrupt, IRQF_ONESHOT | IRQF_NO_AUTOEN, irq_name, dwc_imx); if (ret) return dev_err_probe(dev, ret, "failed to request IRQ #%d\n", irq); ret = device_add_software_node(dev, &dwc3_imx_swnode); if (ret) return dev_err_probe(dev, ret, "failed to add software node\n"); dwc3_imx_configure_glue(dwc_imx); dwc = &dwc_imx->dwc; dwc->dev = dev; dwc->glue_ops = &dwc3_imx_glue_ops; probe_data.res = res; probe_data.dwc = dwc; probe_data.properties = DWC3_DEFAULT_PROPERTIES; probe_data.properties.needs_full_reinit = true; ret = dwc3_core_probe(&probe_data); if (ret) { device_remove_software_node(dev); return ret; } device_set_wakeup_capable(dev, true); return 0; } static void dwc3_imx_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct dwc3 *dwc = dev_get_drvdata(dev); dwc3_core_remove(dwc); device_remove_software_node(dev); } static void dwc3_imx_suspend(struct dwc3_imx *dwc_imx, pm_message_t msg) { if (dwc_imx->pm_suspended) return; if (PMSG_IS_AUTO(msg) || device_may_wakeup(dwc_imx->dev)) dwc3_imx_wakeup_enable(dwc_imx, msg); enable_irq(dwc_imx->irq); dwc_imx->pm_suspended = true; } static void dwc3_imx_resume(struct dwc3_imx *dwc_imx, pm_message_t msg) { struct dwc3 *dwc = &dwc_imx->dwc; if (!dwc_imx->pm_suspended) return; dwc_imx->pm_suspended = false; if (!dwc_imx->wakeup_pending) disable_irq_nosync(dwc_imx->irq); dwc3_imx_wakeup_disable(dwc_imx); /* Upon power loss any previous configuration is lost, restore it */ dwc3_imx_configure_glue(dwc_imx); if (dwc_imx->wakeup_pending) { dwc_imx->wakeup_pending = false; if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE) pm_runtime_put_autosuspend(dwc->dev); else /* * Add wait for xhci switch from suspend * clock to normal clock to detect connection. */ usleep_range(9000, 10000); } } static int dwc3_imx_runtime_suspend(struct device *dev) { struct dwc3 *dwc = dev_get_drvdata(dev); struct dwc3_imx *dwc_imx = to_dwc3_imx(dwc); int ret; ret = dwc3_runtime_suspend(dwc); if (ret) return ret; dwc3_imx_suspend(dwc_imx, PMSG_AUTO_SUSPEND); return 0; } static int dwc3_imx_runtime_resume(struct device *dev) { struct dwc3 *dwc = dev_get_drvdata(dev); struct dwc3_imx *dwc_imx = to_dwc3_imx(dwc); dwc3_imx_resume(dwc_imx, PMSG_AUTO_RESUME); return dwc3_runtime_resume(dwc); } static int dwc3_imx_runtime_idle(struct device *dev) { return dwc3_runtime_idle(dev_get_drvdata(dev)); } static int dwc3_imx_pm_suspend(struct device *dev) { struct dwc3 *dwc = dev_get_drvdata(dev); struct dwc3_imx *dwc_imx = to_dwc3_imx(dwc); int ret; ret = dwc3_pm_suspend(dwc); if (ret) return ret; dwc3_imx_suspend(dwc_imx, PMSG_SUSPEND); if (device_may_wakeup(dev)) { enable_irq_wake(dwc_imx->irq); device_set_out_band_wakeup(dev); } else { clk_disable_unprepare(dwc_imx->suspend_clk); } clk_disable_unprepare(dwc_imx->hsio_clk); return 0; } static int dwc3_imx_pm_resume(struct device *dev) { struct dwc3 *dwc = dev_get_drvdata(dev); struct dwc3_imx *dwc_imx = to_dwc3_imx(dwc); int ret; if (device_may_wakeup(dwc_imx->dev)) { disable_irq_wake(dwc_imx->irq); } else { ret = clk_prepare_enable(dwc_imx->suspend_clk); if (ret) return ret; } ret = clk_prepare_enable(dwc_imx->hsio_clk); if (ret) { clk_disable_unprepare(dwc_imx->suspend_clk); return ret; } dwc3_imx_resume(dwc_imx, PMSG_RESUME); ret = dwc3_pm_resume(dwc); if (ret) return ret; return 0; } static void dwc3_imx_complete(struct device *dev) { dwc3_pm_complete(dev_get_drvdata(dev)); } static int dwc3_imx_prepare(struct device *dev) { return dwc3_pm_prepare(dev_get_drvdata(dev)); } static const struct dev_pm_ops dwc3_imx_dev_pm_ops = { SYSTEM_SLEEP_PM_OPS(dwc3_imx_pm_suspend, dwc3_imx_pm_resume) RUNTIME_PM_OPS(dwc3_imx_runtime_suspend, dwc3_imx_runtime_resume, dwc3_imx_runtime_idle) .complete = pm_sleep_ptr(dwc3_imx_complete), .prepare = pm_sleep_ptr(dwc3_imx_prepare), }; static const struct of_device_id dwc3_imx_of_match[] = { { .compatible = "nxp,imx8mp-dwc3", }, {}, }; MODULE_DEVICE_TABLE(of, dwc3_imx_of_match); static struct platform_driver dwc3_imx_driver = { .probe = dwc3_imx_probe, .remove = dwc3_imx_remove, .driver = { .name = "imx-dwc3", .pm = pm_ptr(&dwc3_imx_dev_pm_ops), .of_match_table = dwc3_imx_of_match, }, }; module_platform_driver(dwc3_imx_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("DesignWare USB3 i.MX Glue Layer");
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