| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Li Jun | 1489 | 84.75% | 2 | 25.00% |
| Alexander Stein | 257 | 14.63% | 2 | 25.00% |
| Zhen Lei | 5 | 0.28% | 1 | 12.50% |
| Nadezda Lutovinova | 3 | 0.17% | 1 | 12.50% |
| Uwe Kleine-König | 2 | 0.11% | 1 | 12.50% |
| Aditya Srivastava | 1 | 0.06% | 1 | 12.50% |
| Total | 1757 | 8 |
// SPDX-License-Identifier: GPL-2.0 /* * dwc3-imx8mp.c - NXP imx8mp Specific Glue layer * * Copyright (c) 2020 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" /* 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_imx8mp { struct device *dev; struct platform_device *dwc3; void __iomem *hsio_blk_base; void __iomem *glue_base; struct clk *hsio_clk; struct clk *suspend_clk; int irq; bool pm_suspended; bool wakeup_pending; }; static void imx8mp_configure_glue(struct dwc3_imx8mp *dwc3_imx) { struct device *dev = dwc3_imx->dev; u32 value; if (!dwc3_imx->glue_base) return; value = readl(dwc3_imx->glue_base + USB_CTRL0); if (device_property_read_bool(dev, "fsl,permanently-attached")) value |= (USB_CTRL0_USB2_FIXED | USB_CTRL0_USB3_FIXED); else value &= ~(USB_CTRL0_USB2_FIXED | USB_CTRL0_USB3_FIXED); if (device_property_read_bool(dev, "fsl,disable-port-power-control")) value &= ~(USB_CTRL0_PORTPWR_EN); else value |= USB_CTRL0_PORTPWR_EN; writel(value, dwc3_imx->glue_base + USB_CTRL0); value = readl(dwc3_imx->glue_base + USB_CTRL1); if (device_property_read_bool(dev, "fsl,over-current-active-low")) value |= USB_CTRL1_OC_POLARITY; else value &= ~USB_CTRL1_OC_POLARITY; if (device_property_read_bool(dev, "fsl,power-active-low")) value |= USB_CTRL1_PWR_POLARITY; else value &= ~USB_CTRL1_PWR_POLARITY; writel(value, dwc3_imx->glue_base + USB_CTRL1); } static void dwc3_imx8mp_wakeup_enable(struct dwc3_imx8mp *dwc3_imx) { struct dwc3 *dwc3 = platform_get_drvdata(dwc3_imx->dwc3); u32 val; if (!dwc3) return; val = readl(dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL); if ((dwc3->current_dr_role == DWC3_GCTL_PRTCAP_HOST) && dwc3->xhci) val |= USB_WAKEUP_EN | USB_WAKEUP_SS_CONN | USB_WAKEUP_U3_EN | USB_WAKEUP_DPDM_EN; else if (dwc3->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE) val |= USB_WAKEUP_EN | USB_WAKEUP_VBUS_EN | USB_WAKEUP_VBUS_SRC_SESS_VAL; writel(val, dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL); } static void dwc3_imx8mp_wakeup_disable(struct dwc3_imx8mp *dwc3_imx) { u32 val; val = readl(dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL); val &= ~(USB_WAKEUP_EN | USB_WAKEUP_EN_MASK); writel(val, dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL); } static irqreturn_t dwc3_imx8mp_interrupt(int irq, void *_dwc3_imx) { struct dwc3_imx8mp *dwc3_imx = _dwc3_imx; struct dwc3 *dwc = platform_get_drvdata(dwc3_imx->dwc3); if (!dwc3_imx->pm_suspended) return IRQ_HANDLED; disable_irq_nosync(dwc3_imx->irq); dwc3_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 int dwc3_imx8mp_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct device_node *dwc3_np, *node = dev->of_node; struct dwc3_imx8mp *dwc3_imx; struct resource *res; int err, irq; if (!node) { dev_err(dev, "device node not found\n"); return -EINVAL; } dwc3_imx = devm_kzalloc(dev, sizeof(*dwc3_imx), GFP_KERNEL); if (!dwc3_imx) return -ENOMEM; platform_set_drvdata(pdev, dwc3_imx); dwc3_imx->dev = dev; dwc3_imx->hsio_blk_base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(dwc3_imx->hsio_blk_base)) return PTR_ERR(dwc3_imx->hsio_blk_base); res = platform_get_resource(pdev, IORESOURCE_MEM, 1); if (!res) { dev_warn(dev, "Base address for glue layer missing. Continuing without, some features are missing though."); } else { dwc3_imx->glue_base = devm_ioremap_resource(dev, res); if (IS_ERR(dwc3_imx->glue_base)) return PTR_ERR(dwc3_imx->glue_base); } dwc3_imx->hsio_clk = devm_clk_get(dev, "hsio"); if (IS_ERR(dwc3_imx->hsio_clk)) { err = PTR_ERR(dwc3_imx->hsio_clk); dev_err(dev, "Failed to get hsio clk, err=%d\n", err); return err; } err = clk_prepare_enable(dwc3_imx->hsio_clk); if (err) { dev_err(dev, "Failed to enable hsio clk, err=%d\n", err); return err; } dwc3_imx->suspend_clk = devm_clk_get(dev, "suspend"); if (IS_ERR(dwc3_imx->suspend_clk)) { err = PTR_ERR(dwc3_imx->suspend_clk); dev_err(dev, "Failed to get suspend clk, err=%d\n", err); goto disable_hsio_clk; } err = clk_prepare_enable(dwc3_imx->suspend_clk); if (err) { dev_err(dev, "Failed to enable suspend clk, err=%d\n", err); goto disable_hsio_clk; } irq = platform_get_irq(pdev, 0); if (irq < 0) { err = irq; goto disable_clks; } dwc3_imx->irq = irq; imx8mp_configure_glue(dwc3_imx); pm_runtime_set_active(dev); pm_runtime_enable(dev); err = pm_runtime_get_sync(dev); if (err < 0) goto disable_rpm; dwc3_np = of_get_compatible_child(node, "snps,dwc3"); if (!dwc3_np) { err = -ENODEV; dev_err(dev, "failed to find dwc3 core child\n"); goto disable_rpm; } err = of_platform_populate(node, NULL, NULL, dev); if (err) { dev_err(&pdev->dev, "failed to create dwc3 core\n"); goto err_node_put; } dwc3_imx->dwc3 = of_find_device_by_node(dwc3_np); if (!dwc3_imx->dwc3) { dev_err(dev, "failed to get dwc3 platform device\n"); err = -ENODEV; goto depopulate; } of_node_put(dwc3_np); err = devm_request_threaded_irq(dev, irq, NULL, dwc3_imx8mp_interrupt, IRQF_ONESHOT, dev_name(dev), dwc3_imx); if (err) { dev_err(dev, "failed to request IRQ #%d --> %d\n", irq, err); goto depopulate; } device_set_wakeup_capable(dev, true); pm_runtime_put(dev); return 0; depopulate: of_platform_depopulate(dev); err_node_put: of_node_put(dwc3_np); disable_rpm: pm_runtime_disable(dev); pm_runtime_put_noidle(dev); disable_clks: clk_disable_unprepare(dwc3_imx->suspend_clk); disable_hsio_clk: clk_disable_unprepare(dwc3_imx->hsio_clk); return err; } static void dwc3_imx8mp_remove(struct platform_device *pdev) { struct dwc3_imx8mp *dwc3_imx = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; pm_runtime_get_sync(dev); of_platform_depopulate(dev); clk_disable_unprepare(dwc3_imx->suspend_clk); clk_disable_unprepare(dwc3_imx->hsio_clk); pm_runtime_disable(dev); pm_runtime_put_noidle(dev); platform_set_drvdata(pdev, NULL); } static int __maybe_unused dwc3_imx8mp_suspend(struct dwc3_imx8mp *dwc3_imx, pm_message_t msg) { if (dwc3_imx->pm_suspended) return 0; /* Wakeup enable */ if (PMSG_IS_AUTO(msg) || device_may_wakeup(dwc3_imx->dev)) dwc3_imx8mp_wakeup_enable(dwc3_imx); dwc3_imx->pm_suspended = true; return 0; } static int __maybe_unused dwc3_imx8mp_resume(struct dwc3_imx8mp *dwc3_imx, pm_message_t msg) { struct dwc3 *dwc = platform_get_drvdata(dwc3_imx->dwc3); int ret = 0; if (!dwc3_imx->pm_suspended) return 0; /* Wakeup disable */ dwc3_imx8mp_wakeup_disable(dwc3_imx); dwc3_imx->pm_suspended = false; /* Upon power loss any previous configuration is lost, restore it */ imx8mp_configure_glue(dwc3_imx); if (dwc3_imx->wakeup_pending) { dwc3_imx->wakeup_pending = false; if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE) { pm_runtime_mark_last_busy(dwc->dev); 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); } enable_irq(dwc3_imx->irq); } return ret; } static int __maybe_unused dwc3_imx8mp_pm_suspend(struct device *dev) { struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev); int ret; ret = dwc3_imx8mp_suspend(dwc3_imx, PMSG_SUSPEND); if (device_may_wakeup(dwc3_imx->dev)) enable_irq_wake(dwc3_imx->irq); else clk_disable_unprepare(dwc3_imx->suspend_clk); clk_disable_unprepare(dwc3_imx->hsio_clk); dev_dbg(dev, "dwc3 imx8mp pm suspend.\n"); return ret; } static int __maybe_unused dwc3_imx8mp_pm_resume(struct device *dev) { struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev); int ret; if (device_may_wakeup(dwc3_imx->dev)) { disable_irq_wake(dwc3_imx->irq); } else { ret = clk_prepare_enable(dwc3_imx->suspend_clk); if (ret) return ret; } ret = clk_prepare_enable(dwc3_imx->hsio_clk); if (ret) return ret; ret = dwc3_imx8mp_resume(dwc3_imx, PMSG_RESUME); pm_runtime_disable(dev); pm_runtime_set_active(dev); pm_runtime_enable(dev); dev_dbg(dev, "dwc3 imx8mp pm resume.\n"); return ret; } static int __maybe_unused dwc3_imx8mp_runtime_suspend(struct device *dev) { struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev); dev_dbg(dev, "dwc3 imx8mp runtime suspend.\n"); return dwc3_imx8mp_suspend(dwc3_imx, PMSG_AUTO_SUSPEND); } static int __maybe_unused dwc3_imx8mp_runtime_resume(struct device *dev) { struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev); dev_dbg(dev, "dwc3 imx8mp runtime resume.\n"); return dwc3_imx8mp_resume(dwc3_imx, PMSG_AUTO_RESUME); } static const struct dev_pm_ops dwc3_imx8mp_dev_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(dwc3_imx8mp_pm_suspend, dwc3_imx8mp_pm_resume) SET_RUNTIME_PM_OPS(dwc3_imx8mp_runtime_suspend, dwc3_imx8mp_runtime_resume, NULL) }; static const struct of_device_id dwc3_imx8mp_of_match[] = { { .compatible = "fsl,imx8mp-dwc3", }, {}, }; MODULE_DEVICE_TABLE(of, dwc3_imx8mp_of_match); static struct platform_driver dwc3_imx8mp_driver = { .probe = dwc3_imx8mp_probe, .remove_new = dwc3_imx8mp_remove, .driver = { .name = "imx8mp-dwc3", .pm = &dwc3_imx8mp_dev_pm_ops, .of_match_table = dwc3_imx8mp_of_match, }, }; module_platform_driver(dwc3_imx8mp_driver); MODULE_ALIAS("platform:imx8mp-dwc3"); MODULE_AUTHOR("jun.li@nxp.com"); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("DesignWare USB3 imx8mp Glue Layer");
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