1 // SPDX-License-Identifier: GPL-2.0
3  * dwc3-imx8mp.c - NXP imx8mp Specific Glue layer
41 	struct platform_device		*dwc3;  member
52 	struct dwc3	*dwc3 = platform_get_drvdata(dwc3_imx->dwc3);  in dwc3_imx8mp_wakeup_enable()  local
55 	if (!dwc3)  in dwc3_imx8mp_wakeup_enable()
58 	val = readl(dwc3_imx->glue_base + USB_WAKEUP_CTRL);  in dwc3_imx8mp_wakeup_enable()
60 	if ((dwc3->current_dr_role == DWC3_GCTL_PRTCAP_HOST) && dwc3->xhci)  in dwc3_imx8mp_wakeup_enable()
63 	else if (dwc3->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)  in dwc3_imx8mp_wakeup_enable()
67 	writel(val, dwc3_imx->glue_base + USB_WAKEUP_CTRL);  in dwc3_imx8mp_wakeup_enable()
74 	val = readl(dwc3_imx->glue_base + USB_WAKEUP_CTRL);  in dwc3_imx8mp_wakeup_disable()
76 	writel(val, dwc3_imx->glue_base + USB_WAKEUP_CTRL);  in dwc3_imx8mp_wakeup_disable()
82 	struct dwc3		*dwc = platform_get_drvdata(dwc3_imx->dwc3);  in dwc3_imx8mp_interrupt()
84 	if (!dwc3_imx->pm_suspended)  in dwc3_imx8mp_interrupt()
87 	disable_irq_nosync(dwc3_imx->irq);  in dwc3_imx8mp_interrupt()
88 	dwc3_imx->wakeup_pending = true;  in dwc3_imx8mp_interrupt()
90 	if ((dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST) && dwc->xhci)  in dwc3_imx8mp_interrupt()
91 		pm_runtime_resume(&dwc->xhci->dev);  in dwc3_imx8mp_interrupt()
92 	else if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)  in dwc3_imx8mp_interrupt()
93 		pm_runtime_get(dwc->dev);  in dwc3_imx8mp_interrupt()
100 	struct device		*dev = &pdev->dev;  in dwc3_imx8mp_probe()
101 	struct device_node	*dwc3_np, *node = dev->of_node;  in dwc3_imx8mp_probe()
107 		return -EINVAL;  in dwc3_imx8mp_probe()
112 		return -ENOMEM;  in dwc3_imx8mp_probe()
116 	dwc3_imx->dev = dev;  in dwc3_imx8mp_probe()
118 	dwc3_imx->glue_base = devm_platform_ioremap_resource(pdev, 0);  in dwc3_imx8mp_probe()
119 	if (IS_ERR(dwc3_imx->glue_base))  in dwc3_imx8mp_probe()
120 		return PTR_ERR(dwc3_imx->glue_base);  in dwc3_imx8mp_probe()
122 	dwc3_imx->hsio_clk = devm_clk_get(dev, "hsio");  in dwc3_imx8mp_probe()
123 	if (IS_ERR(dwc3_imx->hsio_clk)) {  in dwc3_imx8mp_probe()
124 		err = PTR_ERR(dwc3_imx->hsio_clk);  in dwc3_imx8mp_probe()
129 	err = clk_prepare_enable(dwc3_imx->hsio_clk);  in dwc3_imx8mp_probe()
135 	dwc3_imx->suspend_clk = devm_clk_get(dev, "suspend");  in dwc3_imx8mp_probe()
136 	if (IS_ERR(dwc3_imx->suspend_clk)) {  in dwc3_imx8mp_probe()
137 		err = PTR_ERR(dwc3_imx->suspend_clk);  in dwc3_imx8mp_probe()
142 	err = clk_prepare_enable(dwc3_imx->suspend_clk);  in dwc3_imx8mp_probe()
153 	dwc3_imx->irq = irq;  in dwc3_imx8mp_probe()
161 	dwc3_np = of_get_compatible_child(node, "snps,dwc3");  in dwc3_imx8mp_probe()
163 		err = -ENODEV;  in dwc3_imx8mp_probe()
164 		dev_err(dev, "failed to find dwc3 core child\n");  in dwc3_imx8mp_probe()
170 		dev_err(&pdev->dev, "failed to create dwc3 core\n");  in dwc3_imx8mp_probe()
174 	dwc3_imx->dwc3 = of_find_device_by_node(dwc3_np);  in dwc3_imx8mp_probe()
175 	if (!dwc3_imx->dwc3) {  in dwc3_imx8mp_probe()
176 		dev_err(dev, "failed to get dwc3 platform device\n");  in dwc3_imx8mp_probe()
177 		err = -ENODEV;  in dwc3_imx8mp_probe()
185 		dev_err(dev, "failed to request IRQ #%d --> %d\n", irq, err);  in dwc3_imx8mp_probe()
202 	clk_disable_unprepare(dwc3_imx->suspend_clk);  in dwc3_imx8mp_probe()
204 	clk_disable_unprepare(dwc3_imx->hsio_clk);  in dwc3_imx8mp_probe()
212 	struct device *dev = &pdev->dev;  in dwc3_imx8mp_remove()
217 	clk_disable_unprepare(dwc3_imx->suspend_clk);  in dwc3_imx8mp_remove()
218 	clk_disable_unprepare(dwc3_imx->hsio_clk);  in dwc3_imx8mp_remove()
230 	if (dwc3_imx->pm_suspended)  in dwc3_imx8mp_suspend()
234 	if (PMSG_IS_AUTO(msg) || device_may_wakeup(dwc3_imx->dev))  in dwc3_imx8mp_suspend()
237 	dwc3_imx->pm_suspended = true;  in dwc3_imx8mp_suspend()
245 	struct dwc3	*dwc = platform_get_drvdata(dwc3_imx->dwc3);  in dwc3_imx8mp_resume()
248 	if (!dwc3_imx->pm_suspended)  in dwc3_imx8mp_resume()
253 	dwc3_imx->pm_suspended = false;  in dwc3_imx8mp_resume()
255 	if (dwc3_imx->wakeup_pending) {  in dwc3_imx8mp_resume()
256 		dwc3_imx->wakeup_pending = false;  in dwc3_imx8mp_resume()
257 		if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE) {  in dwc3_imx8mp_resume()
258 			pm_runtime_mark_last_busy(dwc->dev);  in dwc3_imx8mp_resume()
259 			pm_runtime_put_autosuspend(dwc->dev);  in dwc3_imx8mp_resume()
267 		enable_irq(dwc3_imx->irq);  in dwc3_imx8mp_resume()
280 	if (device_may_wakeup(dwc3_imx->dev))  in dwc3_imx8mp_pm_suspend()
281 		enable_irq_wake(dwc3_imx->irq);  in dwc3_imx8mp_pm_suspend()
283 		clk_disable_unprepare(dwc3_imx->suspend_clk);  in dwc3_imx8mp_pm_suspend()
285 	clk_disable_unprepare(dwc3_imx->hsio_clk);  in dwc3_imx8mp_pm_suspend()
286 	dev_dbg(dev, "dwc3 imx8mp pm suspend.\n");  in dwc3_imx8mp_pm_suspend()
296 	if (device_may_wakeup(dwc3_imx->dev)) {  in dwc3_imx8mp_pm_resume()
297 		disable_irq_wake(dwc3_imx->irq);  in dwc3_imx8mp_pm_resume()
299 		ret = clk_prepare_enable(dwc3_imx->suspend_clk);  in dwc3_imx8mp_pm_resume()
304 	ret = clk_prepare_enable(dwc3_imx->hsio_clk);  in dwc3_imx8mp_pm_resume()
314 	dev_dbg(dev, "dwc3 imx8mp pm resume.\n");  in dwc3_imx8mp_pm_resume()
323 	dev_dbg(dev, "dwc3 imx8mp runtime suspend.\n");  in dwc3_imx8mp_runtime_suspend()
332 	dev_dbg(dev, "dwc3 imx8mp runtime resume.\n");  in dwc3_imx8mp_runtime_resume()
344 	{ .compatible = "fsl,imx8mp-dwc3", },
353 		.name	= "imx8mp-dwc3",
361 MODULE_ALIAS("platform:imx8mp-dwc3");
364 MODULE_DESCRIPTION("DesignWare USB3 imx8mp Glue Layer");