| Message ID | 1601726527-23326-3-git-send-email-jun.li@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | add NXP imx8mp usb support | expand |
Hi > -----Original Message----- > From: Jun Li <jun.li@nxp.com> > Sent: Saturday, October 3, 2020 8:02 PM > To: robh+dt@kernel.org; shawnguo@kernel.org; balbi@kernel.org > Cc: krzk@kernel.org; gregkh@linuxfoundation.org; s.hauer@pengutronix.de; > kernel@pengutronix.de; festevam@gmail.com; dl-linux-imx > <linux-imx@nxp.com>; Anson Huang <anson.huang@nxp.com>; Jun Li > <jun.li@nxp.com>; Aisheng Dong <aisheng.dong@nxp.com>; Peng Fan > <peng.fan@nxp.com>; Andy Duan <fugang.duan@nxp.com>; Horia Geanta > <horia.geanta@nxp.com>; Joakim Zhang <qiangqing.zhang@nxp.com>; Peter Chen > <peter.chen@nxp.com>; devicetree@vger.kernel.org; > linux-arm-kernel@lists.infradead.org > Subject: [PATCH v5 2/4] usb: dwc3: add imx8mp dwc3 glue layer driver > > imx8mp SoC integrate dwc3 3.30b IP and has some customizations to support > low power, which has a seprated wakeup irq and additional logic to wakeup > usb from low power mode both for host mode and device mode. > > Signed-off-by: Li Jun <jun.li@nxp.com> > --- > drivers/usb/dwc3/Kconfig | 10 ++ > drivers/usb/dwc3/Makefile | 1 + > drivers/usb/dwc3/dwc3-imx8mp.c | 363 > +++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 374 insertions(+) > > diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig index > 7a23045..2133acf 100644 > --- a/drivers/usb/dwc3/Kconfig > +++ b/drivers/usb/dwc3/Kconfig > @@ -139,4 +139,14 @@ config USB_DWC3_QCOM > for peripheral mode support. > Say 'Y' or 'M' if you have one such device. > > +config USB_DWC3_IMX8MP > + tristate "NXP iMX8MP Platform" > + depends on OF && COMMON_CLK > + depends on (ARCH_MXC && ARM64) || COMPILE_TEST > + default USB_DWC3 > + help > + NXP iMX8M Plus SoC use DesignWare Core IP for USB2/3 > + functionality. > + Say 'Y' or 'M' if you have one such device. > + > endif > diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile index > ae86da0..2259f88 100644 > --- a/drivers/usb/dwc3/Makefile > +++ b/drivers/usb/dwc3/Makefile > @@ -51,3 +51,4 @@ obj-$(CONFIG_USB_DWC3_MESON_G12A) += > dwc3-meson-g12a.o > obj-$(CONFIG_USB_DWC3_OF_SIMPLE) += dwc3-of-simple.o > obj-$(CONFIG_USB_DWC3_ST) += dwc3-st.o > obj-$(CONFIG_USB_DWC3_QCOM) += dwc3-qcom.o > +obj-$(CONFIG_USB_DWC3_IMX8MP) += dwc3-imx8mp.o > diff --git a/drivers/usb/dwc3/dwc3-imx8mp.c > b/drivers/usb/dwc3/dwc3-imx8mp.c new file mode 100644 index > 0000000..75f0042 > --- /dev/null > +++ b/drivers/usb/dwc3/dwc3-imx8mp.c > @@ -0,0 +1,363 @@ > +// 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) > + > +struct dwc3_imx8mp { > + struct device *dev; > + struct platform_device *dwc3; > + void __iomem *glue_base; > + struct clk *hsio_clk; > + struct clk *suspend_clk; > + int irq; > + bool pm_suspended; > + bool wakeup_pending; > +}; > + > +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->glue_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->glue_base + USB_WAKEUP_CTRL); } > + > +static void dwc3_imx8mp_wakeup_disable(struct dwc3_imx8mp *dwc3_imx) { > + u32 val; > + > + val = readl(dwc3_imx->glue_base + USB_WAKEUP_CTRL); > + val &= ~(USB_WAKEUP_EN | USB_WAKEUP_EN_MASK); > + writel(val, dwc3_imx->glue_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; > + 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->glue_base = devm_platform_ioremap_resource(pdev, 0); > + 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; > + > + 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 disable_clks; > + } > + > + 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_child_by_name(node, "dwc3"); > + if (!dwc3_np) { > + 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); > + > + 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 int 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); > + > + return 0; > +} > + > +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; > + > + 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 = 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"); > -- > 2.7.4 A gentle ping. Thanks Li Jun
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig index 7a23045..2133acf 100644 --- a/drivers/usb/dwc3/Kconfig +++ b/drivers/usb/dwc3/Kconfig @@ -139,4 +139,14 @@ config USB_DWC3_QCOM for peripheral mode support. Say 'Y' or 'M' if you have one such device. +config USB_DWC3_IMX8MP + tristate "NXP iMX8MP Platform" + depends on OF && COMMON_CLK + depends on (ARCH_MXC && ARM64) || COMPILE_TEST + default USB_DWC3 + help + NXP iMX8M Plus SoC use DesignWare Core IP for USB2/3 + functionality. + Say 'Y' or 'M' if you have one such device. + endif diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile index ae86da0..2259f88 100644 --- a/drivers/usb/dwc3/Makefile +++ b/drivers/usb/dwc3/Makefile @@ -51,3 +51,4 @@ obj-$(CONFIG_USB_DWC3_MESON_G12A) += dwc3-meson-g12a.o obj-$(CONFIG_USB_DWC3_OF_SIMPLE) += dwc3-of-simple.o obj-$(CONFIG_USB_DWC3_ST) += dwc3-st.o obj-$(CONFIG_USB_DWC3_QCOM) += dwc3-qcom.o +obj-$(CONFIG_USB_DWC3_IMX8MP) += dwc3-imx8mp.o diff --git a/drivers/usb/dwc3/dwc3-imx8mp.c b/drivers/usb/dwc3/dwc3-imx8mp.c new file mode 100644 index 0000000..75f0042 --- /dev/null +++ b/drivers/usb/dwc3/dwc3-imx8mp.c @@ -0,0 +1,363 @@ +// 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) + +struct dwc3_imx8mp { + struct device *dev; + struct platform_device *dwc3; + void __iomem *glue_base; + struct clk *hsio_clk; + struct clk *suspend_clk; + int irq; + bool pm_suspended; + bool wakeup_pending; +}; + +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->glue_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->glue_base + USB_WAKEUP_CTRL); +} + +static void dwc3_imx8mp_wakeup_disable(struct dwc3_imx8mp *dwc3_imx) +{ + u32 val; + + val = readl(dwc3_imx->glue_base + USB_WAKEUP_CTRL); + val &= ~(USB_WAKEUP_EN | USB_WAKEUP_EN_MASK); + writel(val, dwc3_imx->glue_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; + 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->glue_base = devm_platform_ioremap_resource(pdev, 0); + 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; + + 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 disable_clks; + } + + 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_child_by_name(node, "dwc3"); + if (!dwc3_np) { + 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); + + 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 int 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); + + return 0; +} + +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; + + 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 = 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");
imx8mp SoC integrate dwc3 3.30b IP and has some customizations to support low power, which has a seprated wakeup irq and additional logic to wakeup usb from low power mode both for host mode and device mode. Signed-off-by: Li Jun <jun.li@nxp.com> --- drivers/usb/dwc3/Kconfig | 10 ++ drivers/usb/dwc3/Makefile | 1 + drivers/usb/dwc3/dwc3-imx8mp.c | 363 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 374 insertions(+)