Revert "usb:cdns3 Add Cadence USB3 DRD Driver"

This reverts commit 8bc1901ca7b07d864fca11461b3875b31f949765.

It's broken.

Reported-by: Stephen Rothwell <[e-mail]>
Cc: Felipe Balbi <[e-mail]>
Cc: Pawel Laszczak <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/Kconfig

···
 
 endif
 
-source "drivers/usb/cdns3/Kconfig"
-
 source "drivers/usb/mtu3/Kconfig"
 
 source "drivers/usb/musb/Kconfig"

drivers/usb/Makefile

···
 obj-$(CONFIG_USB_DWC2)		+= dwc2/
 obj-$(CONFIG_USB_ISP1760)	+= isp1760/
 
-obj-$(CONFIG_USB_CDNS3)		+= cdns3/
-
 obj-$(CONFIG_USB_MON)		+= mon/
 obj-$(CONFIG_USB_MTU3)		+= mtu3/
 

drivers/usb/cdns3/Kconfig

···
-config USB_CDNS3
-	tristate "Cadence USB3 Dual-Role Controller"
-	depends on USB_SUPPORT && (USB || USB_GADGET) && HAS_DMA
-	help
-	  Say Y here if your system has a Cadence USB3 dual-role controller.
-	  It supports: dual-role switch, Host-only, and Peripheral-only.
-
-	  If you choose to build this driver is a dynamically linked
-	  as module, the module will be called cdns3.ko.
-
-if USB_CDNS3
-
-config USB_CDNS3_GADGET
-	bool "Cadence USB3 device controller"
-	depends on USB_GADGET
-	help
-	  Say Y here to enable device controller functionality of the
-	  Cadence USBSS-DEV driver.
-
-	  This controller supports FF, HS and SS mode. It doesn't support
-	  LS and SSP mode.
-
-config USB_CDNS3_HOST
-	bool "Cadence USB3 host controller"
-	depends on USB_XHCI_HCD
-	help
-	  Say Y here to enable host controller functionality of the
-	  Cadence driver.
-
-	  Host controller is compliant with XHCI so it will use
-	  standard XHCI driver.
-
-config USB_CDNS3_PCI_WRAP
-	tristate "Cadence USB3 support on PCIe-based platforms"
-	depends on USB_PCI && ACPI
-	default USB_CDNS3
-	help
-	  If you're using the USBSS Core IP with a PCIe, please say
-	  'Y' or 'M' here.
-
-	  If you choose to build this driver as module it will
-	  be dynamically linked and module will be called cdns3-pci.ko
-
-endif

drivers/usb/cdns3/Makefile

···
-# SPDX-License-Identifier: GPL-2.0
-# define_trace.h needs to know how to find our header
-CFLAGS_trace.o				:= -I$(src)
-
-cdns3-y					:= core.o drd.o
-
-obj-$(CONFIG_USB_CDNS3)			+= cdns3.o
-ifneq ($(CONFIG_DEBUG_FS),)
-	cdns3-y				+= debugfs.o
-endif
-
-cdns3-$(CONFIG_USB_CDNS3_GADGET)	+= gadget.o ep0.o trace.o
-cdns3-$(CONFIG_USB_CDNS3_HOST)		+= host.o
-obj-$(CONFIG_USB_CDNS3_PCI_WRAP)	+= cdns3-pci-wrap.o

drivers/usb/cdns3/cdns3-pci-wrap.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Cadence USBSS PCI Glue driver
- *
- * Copyright (C) 2018-2019 Cadence.
- *
- * Author: Pawel Laszczak <[e-mail]>
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/platform_device.h>
-#include <linux/dma-mapping.h>
-#include <linux/slab.h>
-
-struct cdns3_wrap {
-	struct platform_device *plat_dev;
-	struct pci_dev *hg_dev;
-	struct resource dev_res[6];
-};
-
-#define RES_IRQ_HOST_ID		0
-#define RES_IRQ_PERIPHERAL_ID	1
-#define RES_IRQ_OTG_ID		2
-#define RES_HOST_ID		3
-#define RES_DEV_ID		4
-#define RES_DRD_ID		5
-
-#define PCI_BAR_HOST		0
-#define PCI_BAR_DEV		2
-#define PCI_BAR_OTG		4
-
-#define PCI_DEV_FN_HOST_DEVICE	0
-#define PCI_DEV_FN_OTG		1
-
-#define PCI_DRIVER_NAME		"cdns3-pci-usbss"
-#define PLAT_DRIVER_NAME	"cdns-usb3"
-
-#define CDNS_VENDOR_ID		0x17cd
-#define CDNS_DEVICE_ID		0x0100
-
-static int cdns3_pci_probe(struct pci_dev *pdev,
-			   const struct pci_device_id *id)
-{
-	struct platform_device_info plat_info;
-	struct cdns3_wrap *wrap;
-	struct resource *res;
-	int err;
-
-	/*
-	 * for GADGET/HOST PCI (devfn) function number is 0,
-	 * for OTG PCI (devfn) function number is 1
-	 */
-	if (!id || pdev->devfn != PCI_DEV_FN_HOST_DEVICE)
-		return -EINVAL;
-
-	err = pcim_enable_device(pdev);
-	if (err) {
-		dev_err(&pdev->dev, "Enabling PCI device has failed %d\n", err);
-		return err;
-	}
-
-	pci_set_master(pdev);
-	wrap = devm_kzalloc(&pdev->dev, sizeof(*wrap), GFP_KERNEL);
-	if (!wrap) {
-		pci_disable_device(pdev);
-		return -ENOMEM;
-	}
-
-	/* function 0: host(BAR_0) + device(BAR_1) + otg(BAR_2)). */
-	dev_dbg(&pdev->dev, "Initialize Device resources\n");
-	res = wrap->dev_res;
-
-	res[RES_DEV_ID].start = pci_resource_start(pdev, PCI_BAR_DEV);
-	res[RES_DEV_ID].end =   pci_resource_end(pdev, PCI_BAR_DEV);
-	res[RES_DEV_ID].name = "dev";
-	res[RES_DEV_ID].flags = IORESOURCE_MEM;
-	dev_dbg(&pdev->dev, "USBSS-DEV physical base addr: %pa\n",
-		&res[RES_DEV_ID].start);
-
-	res[RES_HOST_ID].start = pci_resource_start(pdev, PCI_BAR_HOST);
-	res[RES_HOST_ID].end = pci_resource_end(pdev, PCI_BAR_HOST);
-	res[RES_HOST_ID].name = "xhci";
-	res[RES_HOST_ID].flags = IORESOURCE_MEM;
-	dev_dbg(&pdev->dev, "USBSS-XHCI physical base addr: %pa\n",
-		&res[RES_HOST_ID].start);
-
-	res[RES_DRD_ID].start = pci_resource_start(pdev, PCI_BAR_OTG);
-	res[RES_DRD_ID].end =   pci_resource_end(pdev, PCI_BAR_OTG);
-	res[RES_DRD_ID].name = "otg";
-	res[RES_DRD_ID].flags = IORESOURCE_MEM;
-	dev_dbg(&pdev->dev, "USBSS-DRD physical base addr: %pa\n",
-		&res[RES_DRD_ID].start);
-
-	/* Interrupt for XHCI */
-	wrap->dev_res[RES_IRQ_HOST_ID].start = pdev->irq;
-	wrap->dev_res[RES_IRQ_HOST_ID].name = "host";
-	wrap->dev_res[RES_IRQ_HOST_ID].flags = IORESOURCE_IRQ;
-
-	/* Interrupt device. It's the same as for HOST. */
-	wrap->dev_res[RES_IRQ_PERIPHERAL_ID].start = pdev->irq;
-	wrap->dev_res[RES_IRQ_PERIPHERAL_ID].name = "peripheral";
-	wrap->dev_res[RES_IRQ_PERIPHERAL_ID].flags = IORESOURCE_IRQ;
-
-	/* Interrupt for OTG/DRD. */
-	wrap->dev_res[RES_IRQ_OTG_ID].start = pdev->irq;
-	wrap->dev_res[RES_IRQ_OTG_ID].name = "otg";
-	wrap->dev_res[RES_IRQ_OTG_ID].flags = IORESOURCE_IRQ;
-
-	/* set up platform device info */
-	memset(&plat_info, 0, sizeof(plat_info));
-	plat_info.parent = &pdev->dev;
-	plat_info.fwnode = pdev->dev.fwnode;
-	plat_info.name = PLAT_DRIVER_NAME;
-	plat_info.id = pdev->devfn;
-	plat_info.res = wrap->dev_res;
-	plat_info.num_res = ARRAY_SIZE(wrap->dev_res);
-	plat_info.dma_mask = pdev->dma_mask;
-
-	/* register platform device */
-	wrap->plat_dev = platform_device_register_full(&plat_info);
-	if (IS_ERR(wrap->plat_dev)) {
-		pci_disable_device(pdev);
-		return PTR_ERR(wrap->plat_dev);
-	}
-
-	pci_set_drvdata(pdev, wrap);
-
-	return err;
-}
-
-static void cdns3_pci_remove(struct pci_dev *pdev)
-{
-	struct cdns3_wrap *wrap = (struct cdns3_wrap *)pci_get_drvdata(pdev);
-
-	platform_device_unregister(wrap->plat_dev);
-}
-
-static const struct pci_device_id cdns3_pci_ids[] = {
-	{ PCI_DEVICE(CDNS_VENDOR_ID, CDNS_DEVICE_ID), },
-	{ 0, }
-};
-
-static struct pci_driver cdns3_pci_driver = {
-	.name = PCI_DRIVER_NAME,
-	.id_table = cdns3_pci_ids,
-	.probe = cdns3_pci_probe,
-	.remove = cdns3_pci_remove,
-};
-
-module_pci_driver(cdns3_pci_driver);
-MODULE_DEVICE_TABLE(pci, cdns3_pci_ids);
-
-MODULE_AUTHOR("Pawel Laszczak <[e-mail]>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("Cadence USBSS PCI wrapperr");

drivers/usb/cdns3/core.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Cadence USBSS DRD Driver.
- *
- * Copyright (C) 2018-2019 Cadence.
- * Copyright (C) 2017-2018 NXP
- * Copyright (C) 2019 Texas Instruments
- *
- * Author: Peter Chen <[e-mail]>
- *         Pawel Laszczak <[e-mail]>
- *         Roger Quadros <[e-mail]>
- */
-
-#include <linux/dma-mapping.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/pm_runtime.h>
-
-#include "gadget.h"
-#include "core.h"
-#include "host-export.h"
-#include "gadget-export.h"
-#include "drd.h"
-#include "debug.h"
-
-/**
- * cdns3_handshake - spin reading  until handshake completes or fails
- * @ptr: address of device controller register to be read
- * @mask: bits to look at in result of read
- * @done: value of those bits when handshake succeeds
- * @usec: timeout in microseconds
- *
- * Returns negative errno, or zero on success
- *
- * Success happens when the "mask" bits have the specified value (hardware
- * handshake done). There are two failure modes: "usec" have passed (major
- * hardware flakeout), or the register reads as all-ones (hardware removed).
- */
-int cdns3_handshake(void __iomem *ptr, u32 mask, u32 done, int usec)
-{
-	u32 result;
-
-	do {
-		result = readl(ptr);
-		if (result == ~(u32)0)  /* card removed */
-			return -ENODEV;
-
-		result &= mask;
-		if (result == done)
-			return 0;
-
-		udelay(1);
-		usec--;
-	} while (usec > 0);
-
-	return -ETIMEDOUT;
-}
-
-static inline
-struct cdns3_role_driver *cdns3_get_current_role_driver(struct cdns3 *cdns)
-{
-	WARN_ON(cdns->role >= CDNS3_ROLE_END || !cdns->roles[cdns->role]);
-	return cdns->roles[cdns->role];
-}
-
-static int cdns3_role_start(struct cdns3 *cdns, enum cdns3_roles role)
-{
-	int ret;
-
-	if (WARN_ON(role >= CDNS3_ROLE_END))
-		return 0;
-
-	if (!cdns->roles[role])
-		return -ENXIO;
-
-	if (cdns->roles[role]->state == CDNS3_ROLE_STATE_ACTIVE)
-		return 0;
-
-	mutex_lock(&cdns->mutex);
-	cdns->role = role;
-	ret = cdns->roles[role]->start(cdns);
-	if (!ret)
-		cdns->roles[role]->state = CDNS3_ROLE_STATE_ACTIVE;
-	mutex_unlock(&cdns->mutex);
-	return ret;
-}
-
-void cdns3_role_stop(struct cdns3 *cdns)
-{
-	enum cdns3_roles role = cdns->role;
-
-	if (role >= CDNS3_ROLE_END) {
-		WARN_ON(role > CDNS3_ROLE_END);
-		return;
-	}
-
-	if (cdns->roles[role]->state == CDNS3_ROLE_STATE_INACTIVE)
-		return;
-
-	mutex_lock(&cdns->mutex);
-	cdns->roles[role]->stop(cdns);
-	cdns->roles[role]->state = CDNS3_ROLE_STATE_INACTIVE;
-	mutex_unlock(&cdns->mutex);
-}
-
-static void cdns3_exit_roles(struct cdns3 *cdns)
-{
-	cdns3_role_stop(cdns);
-	cdns3_drd_exit(cdns);
-}
-
-enum cdns3_roles cdsn3_get_real_role(struct cdns3 *cdns);
-
-static int cdns3_idle_role_start(struct cdns3 *cnds)
-{	/* Hold PHY in RESET */
-	return 0;
-}
-
-static void cdns3_idle_role_stop(struct cdns3 *cnds)
-{
-	/* Program Lane swap and bring PHY out of RESET */
-}
-
-static int cdns3_idle_init(struct cdns3 *cdns)
-{
-	struct cdns3_role_driver *rdrv;
-
-	rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
-	if (!rdrv)
-		return -ENOMEM;
-
-	rdrv->start = cdns3_idle_role_start;
-	rdrv->stop = cdns3_idle_role_stop;
-	rdrv->state = CDNS3_ROLE_STATE_INACTIVE;
-	rdrv->suspend = NULL;
-	rdrv->resume = NULL;
-	rdrv->name = "idle";
-
-	cdns->roles[CDNS3_ROLE_IDLE] = rdrv;
-
-	return 0;
-}
-
-/**
- * cdns3_core_init_role - initialize role of operation
- * @cdns: Pointer to cdns3 structure
- *
- * Returns 0 on success otherwise negative errno
- */
-static int cdns3_core_init_role(struct cdns3 *cdns)
-{
-	struct device *dev = cdns->dev;
-	enum usb_dr_mode best_dr_mode;
-	enum usb_dr_mode dr_mode;
-	int ret = 0;
-
-	dr_mode = usb_get_dr_mode(dev);
-	cdns->role = CDNS3_ROLE_END;
-
-	/*
-	 * If driver can't read mode by means of usb_get_dr_mode function then
-	 * chooses mode according with Kernel configuration. This setting
-	 * can be restricted later depending on strap pin configuration.
-	 */
-	if (dr_mode == USB_DR_MODE_UNKNOWN) {
-		if (IS_ENABLED(CONFIG_USB_CDNS3_HOST) &&
-		    IS_ENABLED(CONFIG_USB_CDNS3_GADGET))
-			dr_mode = USB_DR_MODE_OTG;
-		else if (IS_ENABLED(CONFIG_USB_CDNS3_HOST))
-			dr_mode = USB_DR_MODE_HOST;
-		else if (IS_ENABLED(CONFIG_USB_CDNS3_GADGET))
-			dr_mode = USB_DR_MODE_PERIPHERAL;
-	}
-
-	/*
-	 * At this point cdns->dr_mode contains strap configuration.
-	 * Driver try update this setting considering kernel configuration
-	 */
-	best_dr_mode = cdns->dr_mode;
-
-	ret = cdns3_idle_init(cdns);
-	if (ret)
-		return ret;
-
-	if (dr_mode == USB_DR_MODE_OTG) {
-		best_dr_mode = cdns->dr_mode;
-	} else if (cdns->dr_mode == USB_DR_MODE_OTG) {
-		best_dr_mode = dr_mode;
-	} else if (cdns->dr_mode != dr_mode) {
-		dev_err(dev, "Incorrect DRD configuration\n");
-		return -EINVAL;
-	}
-
-	dr_mode = best_dr_mode;
-
-	if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) {
-		ret = cdns3_host_init(cdns);
-		if (ret) {
-			dev_err(dev, "Host initialization failed with %d\n",
-				ret);
-			goto err;
-		}
-	}
-
-	if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) {
-		ret = cdns3_gadget_init(cdns);
-		if (ret) {
-			dev_err(dev, "Device initialization failed with %d\n",
-				ret);
-			goto err;
-		}
-	}
-
-	cdns->desired_dr_mode = dr_mode;
-	cdns->dr_mode = dr_mode;
-
-	/*
-	 * desired_dr_mode might have changed so we need to update
-	 * the controller configuration"?
-	 */
-	ret = cdns3_drd_update_mode(cdns);
-	if (ret)
-		goto err;
-
-	cdns->role = cdsn3_get_real_role(cdns);
-
-	ret = cdns3_role_start(cdns, cdns->role);
-	if (ret) {
-		dev_err(dev, "can't start %s role\n",
-			cdns3_get_current_role_driver(cdns)->name);
-		goto err;
-	}
-
-	return ret;
-err:
-	cdns3_exit_roles(cdns);
-	return ret;
-}
-
-/**
- * cdsn3_get_real_role - get real role of controller based on hardware settings.
- * @cdns: Pointer to cdns3 structure
- *
- * Returns role
- */
-enum cdns3_roles cdsn3_get_real_role(struct cdns3 *cdns)
-{
-	enum cdns3_roles role;
-	int id, vbus;
-
-	if (cdns->current_dr_mode != USB_DR_MODE_OTG)
-		goto not_otg;
-
-	id = cdns3_get_id(cdns);
-	vbus = cdns3_get_vbus(cdns);
-
-	/*
-	 * Role change state machine
-	 * Inputs: ID, VBUS
-	 * Previous state: cdns->role
-	 * Next state: role
-	 */
-	role = cdns->role;
-
-	switch (role) {
-	case CDNS3_ROLE_IDLE: /* from IDLE, we can change to HOST or GADGET */
-		if (!id)
-			role = CDNS3_ROLE_HOST;
-		else if (vbus)
-			role = CDNS3_ROLE_GADGET;
-		break;
-	case CDNS3_ROLE_HOST: /* from HOST, we can only change to IDLE */
-		if (id)
-			role = CDNS3_ROLE_IDLE;
-		break;
-	case CDNS3_ROLE_GADGET: /* from GADGET, we can only change to IDLE */
-		if (!vbus)
-			role = CDNS3_ROLE_IDLE;
-		break;
-	case CDNS3_ROLE_END: /* only at initialization, move to IDLE */
-		role = CDNS3_ROLE_IDLE;
-		break;
-	}
-
-	dev_dbg(cdns->dev, "role %d -> %d\n", cdns->role, role);
-
-	return role;
-
-not_otg:
-	if (cdns3_is_host(cdns))
-		role = CDNS3_ROLE_HOST;
-	if (cdns3_is_device(cdns))
-		role = CDNS3_ROLE_GADGET;
-
-	return role;
-}
-
-/**
- * cdns3_role_switch - work queue handler for role switch
- *
- * @work: work queue item structure
- *
- * Handles below events:
- * - Role switch for dual-role devices
- * - CDNS3_ROLE_GADGET <--> CDNS3_ROLE_END for peripheral-only devices
- */
-static void cdns3_role_switch(struct work_struct *work)
-{
-	enum cdns3_roles role = CDNS3_ROLE_END;
-	struct cdns3_role_driver *role_drv;
-	enum cdns3_roles current_role;
-	struct cdns3 *cdns;
-	int ret = 0;
-
-	cdns = container_of(work, struct cdns3, role_switch_wq);
-
-	pm_runtime_get_sync(cdns->dev);
-
-	role = cdsn3_get_real_role(cdns);
-
-	role_drv = cdns3_get_current_role_driver(cdns);
-
-	/* Disable current role if requested from debugfs */
-	if (cdns->debug_disable && role_drv->state == CDNS3_ROLE_STATE_ACTIVE) {
-		cdns3_role_stop(cdns);
-		goto exit;
-	}
-
-	/* Do nothing if nothing changed */
-	if (cdns->role == role && role_drv->state == CDNS3_ROLE_STATE_ACTIVE)
-		goto exit;
-
-	cdns3_role_stop(cdns);
-
-	role = cdsn3_get_real_role(cdns);
-
-	current_role = cdns->role;
-	dev_dbg(cdns->dev, "Switching role");
-
-	ret = cdns3_role_start(cdns, role);
-	if (ret) {
-		/* Back to current role */
-		dev_err(cdns->dev, "set %d has failed, back to %d\n",
-			role, current_role);
-		ret = cdns3_role_start(cdns, current_role);
-		if (ret)
-			dev_err(cdns->dev, "back to %d failed too\n",
-				current_role);
-	}
-exit:
-	pm_runtime_put_sync(cdns->dev);
-}
-
-/**
- * cdns3_probe - probe for cdns3 core device
- * @pdev: Pointer to cdns3 core platform device
- *
- * Returns 0 on success otherwise negative errno
- */
-static int cdns3_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct resource	*res;
-	struct cdns3 *cdns;
-	void __iomem *regs;
-	int ret;
-
-	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
-	if (ret) {
-		dev_err(dev, "error setting dma mask: %d\n", ret);
-		return -ENODEV;
-	}
-
-	cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL);
-	if (!cdns)
-		return -ENOMEM;
-
-	cdns->dev = dev;
-
-	platform_set_drvdata(pdev, cdns);
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "host");
-	if (!res) {
-		dev_err(dev, "missing host IRQ\n");
-		return -ENODEV;
-	}
-
-	cdns->xhci_res[0] = *res;
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "xhci");
-	if (!res) {
-		dev_err(dev, "couldn't get xhci resource\n");
-		return -ENXIO;
-	}
-
-	cdns->xhci_res[1] = *res;
-
-	cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral");
-	if (cdns->dev_irq == -EPROBE_DEFER)
-		return cdns->dev_irq;
-
-	if (cdns->dev_irq < 0)
-		dev_err(dev, "couldn't get peripheral irq\n");
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dev");
-	regs = devm_ioremap_resource(dev, res);
-	if (IS_ERR(regs)) {
-		dev_err(dev, "couldn't iomap dev resource\n");
-		return PTR_ERR(regs);
-	}
-	cdns->dev_regs	= regs;
-
-	cdns->otg_irq = platform_get_irq_byname(pdev, "otg");
-	if (cdns->otg_irq == -EPROBE_DEFER)
-		return cdns->otg_irq;
-
-	if (cdns->otg_irq < 0) {
-		dev_err(dev, "couldn't get otg irq\n");
-		return cdns->otg_irq;
-	}
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "otg");
-	if (!res) {
-		dev_err(dev, "couldn't get otg resource\n");
-		return -ENXIO;
-	}
-
-	cdns->otg_res = *res;
-
-	mutex_init(&cdns->mutex);
-
-	cdns->usb2_phy = devm_phy_optional_get(dev, "cdns3,usb2-phy");
-	if (IS_ERR(cdns->usb2_phy))
-		return PTR_ERR(cdns->usb2_phy);
-
-	phy_init(cdns->usb2_phy);
-	ret = phy_init(cdns->usb2_phy);
-	if (ret)
-		return ret;
-
-	cdns->usb3_phy = devm_phy_optional_get(dev, "cdns3,usb3-phy");
-	if (IS_ERR(cdns->usb3_phy))
-		return PTR_ERR(cdns->usb3_phy);
-
-	phy_init(cdns->usb3_phy);
-	ret = phy_init(cdns->usb3_phy);
-	if (ret)
-		return ret;
-
-	ret = phy_power_on(cdns->usb2_phy);
-	if (ret)
-		return ret;
-
-	ret = phy_power_on(cdns->usb3_phy);
-	if (ret)
-		goto err1;
-
-	INIT_WORK(&cdns->role_switch_wq, cdns3_role_switch);
-
-	ret = cdns3_drd_init(cdns);
-	if (ret)
-		goto err2;
-
-	ret = cdns3_core_init_role(cdns);
-	if (ret)
-		goto err2;
-
-	cdns3_debugfs_init(cdns);
-	device_set_wakeup_capable(dev, true);
-	pm_runtime_set_active(dev);
-	pm_runtime_enable(dev);
-
-	/*
-	 * The controller needs less time between bus and controller suspend,
-	 * and we also needs a small delay to avoid frequently entering low
-	 * power mode.
-	 */
-	pm_runtime_set_autosuspend_delay(dev, 20);
-	pm_runtime_mark_last_busy(dev);
-	pm_runtime_use_autosuspend(dev);
-	dev_dbg(dev, "Cadence USB3 core: probe succeed\n");
-
-	return 0;
-
-err2:
-	phy_power_off(cdns->usb3_phy);
-
-err1:
-	phy_power_off(cdns->usb2_phy);
-	phy_exit(cdns->usb2_phy);
-	phy_exit(cdns->usb3_phy);
-
-	return ret;
-}
-
-/**
- * cdns3_remove - unbind drd driver and clean up
- * @pdev: Pointer to Linux platform device
- *
- * Returns 0 on success otherwise negative errno
- */
-static int cdns3_remove(struct platform_device *pdev)
-{
-	struct cdns3 *cdns = platform_get_drvdata(pdev);
-
-	pm_runtime_get_sync(&pdev->dev);
-	pm_runtime_disable(&pdev->dev);
-	pm_runtime_put_noidle(&pdev->dev);
-	cdns3_debugfs_exit(cdns);
-	cdns3_exit_roles(cdns);
-	phy_power_off(cdns->usb2_phy);
-	phy_power_off(cdns->usb3_phy);
-	phy_exit(cdns->usb2_phy);
-	phy_exit(cdns->usb3_phy);
-	return 0;
-}
-
-#ifdef CONFIG_OF
-static const struct of_device_id of_cdns3_match[] = {
-	{ .compatible = "cdns,usb3" },
-	{ },
-};
-MODULE_DEVICE_TABLE(of, of_cdns3_match);
-#endif
-
-static struct platform_driver cdns3_driver = {
-	.probe		= cdns3_probe,
-	.remove		= cdns3_remove,
-	.driver		= {
-		.name	= "cdns-usb3",
-		.of_match_table	= of_match_ptr(of_cdns3_match),
-	},
-};
-
-module_platform_driver(cdns3_driver);
-
-MODULE_ALIAS("platform:cdns3");
-MODULE_AUTHOR("Pawel Laszczak <[e-mail]>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("Cadence USB3 DRD Controller Driver");

drivers/usb/cdns3/core.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Cadence USBSS DRD Header File.
- *
- * Copyright (C) 2017-2018 NXP
- * Copyright (C) 2018-2019 Cadence.
- *
- * Authors: Peter Chen <[e-mail]>
- *          Pawel Laszczak <[e-mail]>
- */
-#include <linux/usb/otg.h>
-
-#ifndef __LINUX_CDNS3_CORE_H
-#define __LINUX_CDNS3_CORE_H
-
-struct cdns3;
-enum cdns3_roles {
-	CDNS3_ROLE_IDLE = 0,
-	CDNS3_ROLE_HOST,
-	CDNS3_ROLE_GADGET,
-	CDNS3_ROLE_END,
-};
-
-/**
- * struct cdns3_role_driver - host/gadget role driver
- * @start: start this role
- * @stop: stop this role
- * @suspend: suspend callback for this role
- * @resume: resume callback for this role
- * @irq: irq handler for this role
- * @name: role name string (host/gadget)
- * @state: current state
- */
-struct cdns3_role_driver {
-	int (*start)(struct cdns3 *cdns);
-	void (*stop)(struct cdns3 *cdns);
-	int (*suspend)(struct cdns3 *cdns, bool do_wakeup);
-	int (*resume)(struct cdns3 *cdns, bool hibernated);
-	const char *name;
-#define CDNS3_ROLE_STATE_INACTIVE	0
-#define CDNS3_ROLE_STATE_ACTIVE		1
-	int state;
-};
-
-#define CDNS3_XHCI_RESOURCES_NUM	2
-/**
- * struct cdns3 - Representation of Cadence USB3 DRD controller.
- * @dev: pointer to Cadence device struct
- * @xhci_regs: pointer to base of xhci registers
- * @xhci_res: the resource for xhci
- * @dev_regs: pointer to base of dev registers
- * @otg_res: the resource for otg
- * @otg_v0_regs: pointer to base of v0 otg registers
- * @otg_v1_regs: pointer to base of v1 otg registers
- * @otg_regs: pointer to base of otg registers
- * @otg_irq: irq number for otg controller
- * @dev_irq: irq number for device controller
- * @roles: array of supported roles for this controller
- * @role: current role
- * @host_dev: the child host device pointer for cdns3 core
- * @gadget_dev: the child gadget device pointer for cdns3 core
- * @usb2_phy: pointer to USB2 PHY
- * @usb3_phy: pointer to USB3 PHY
- * @role_switch_wq: work queue item for role switch
- * @wakeup_int: the wakeup interrupt
- * @mutex: the mutex for concurrent code at driver
- * @dr_mode: supported mode of operation it can be only Host, only Device
- *           or OTG mode that allow to switch between Device and Host mode.
- *           This field based on firmware setting, kernel configuration
- *           and hardware configuration.
- * @current_dr_mode: current mode of operation when in dual-role mode
- * @desired_dr_mode: desired mode of operation when in dual-role mode.
- *           This value can be changed during runtime.
- *           Available options depends on  dr_mode:
- *           dr_mode                 |  desired_dr_mode and current_dr_mode
- *           ----------------------------------------------------------------
- *           USB_DR_MODE_HOST        | only USB_DR_MODE_HOST
- *           USB_DR_MODE_PERIPHERAL  | only USB_DR_MODE_PERIPHERAL
- *           USB_DR_MODE_OTG         | USB_DR_MODE_OTG or USB_DR_MODE_HOST or
- *                                   | USB_DR_MODE_PERIPHERAL
- *           Desired_dr_role can be changed by means of debugfs.
- * @root: debugfs root folder pointer
- * @debug_disable:
- */
-struct cdns3 {
-	struct device			*dev;
-	void __iomem			*xhci_regs;
-	struct resource			xhci_res[CDNS3_XHCI_RESOURCES_NUM];
-	struct cdns3_usb_regs __iomem	*dev_regs;
-
-	struct resource			otg_res;
-	struct cdns3_otg_legacy_regs	*otg_v0_regs;
-	struct cdns3_otg_regs		*otg_v1_regs;
-	struct cdns3_otg_common_regs	*otg_regs;
-#define CDNS3_CONTROLLER_V0	0
-#define CDNS3_CONTROLLER_V1	1
-	u32				version;
-
-	int				otg_irq;
-	int				dev_irq;
-	struct cdns3_role_driver	*roles[CDNS3_ROLE_END];
-	enum cdns3_roles		role;
-	struct platform_device		*host_dev;
-	struct cdns3_device		*gadget_dev;
-	struct phy			*usb2_phy;
-	struct phy			*usb3_phy;
-	struct work_struct		role_switch_wq;
-	int				wakeup_int:1;
-	/* mutext used in workqueue*/
-	struct mutex			mutex;
-	enum usb_dr_mode		dr_mode;
-	enum usb_dr_mode		current_dr_mode;
-	enum usb_dr_mode		desired_dr_mode;
-	struct dentry			*root;
-	int				debug_disable:1;
-};
-
-void cdns3_role_stop(struct cdns3 *cdns);
-int cdns3_handshake(void __iomem *ptr, u32 mask, u32 done, int usec);
-
-#endif /* __LINUX_CDNS3_CORE_H */

drivers/usb/cdns3/debug.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Cadence USBSS DRD Driver.
- * Debug header file.
- *
- * Copyright (C) 2018-2019 Cadence.
- *
- * Author: Pawel Laszczak <[e-mail]>
- */
-#ifndef __LINUX_CDNS3_DEBUG
-#define __LINUX_CDNS3_DEBUG
-
-#include "core.h"
-
-static inline char *cdns3_decode_usb_irq(char *str,
-					 enum usb_device_speed speed,
-					 u32 usb_ists)
-{
-	int ret;
-
-	ret = sprintf(str, "IRQ %08x = ", usb_ists);
-
-	if (usb_ists & (USB_ISTS_CON2I | USB_ISTS_CONI)) {
-		ret += sprintf(str + ret, "Connection %s\n",
-			       usb_speed_string(speed));
-	}
-	if (usb_ists & USB_ISTS_DIS2I || usb_ists & USB_ISTS_DISI)
-		ret += sprintf(str + ret, "Disconnection ");
-	if (usb_ists & USB_ISTS_L2ENTI)
-		ret += sprintf(str + ret, "suspended ");
-	if (usb_ists & USB_ISTS_L1ENTI)
-		ret += sprintf(str + ret, "L1 enter ");
-	if (usb_ists & USB_ISTS_L1EXTI)
-		ret += sprintf(str + ret, "L1 exit ");
-	if (usb_ists & USB_ISTS_L2ENTI)
-		ret += sprintf(str + ret, "L2 enter ");
-	if (usb_ists & USB_ISTS_L2EXTI)
-		ret += sprintf(str + ret, "L2 exit ");
-	if (usb_ists & USB_ISTS_U3EXTI)
-		ret += sprintf(str + ret, "U3 exit ");
-	if (usb_ists & USB_ISTS_UWRESI)
-		ret += sprintf(str + ret, "Warm Reset ");
-	if (usb_ists & USB_ISTS_UHRESI)
-		ret += sprintf(str + ret, "Hot Reset ");
-	if (usb_ists & USB_ISTS_U2RESI)
-		ret += sprintf(str + ret, "Reset");
-
-	return str;
-}
-
-static inline  char *cdns3_decode_ep_irq(char *str,
-					 u32 ep_sts,
-					 const char *ep_name)
-{
-	int ret;
-
-	ret = sprintf(str, "IRQ for %s: %08x ", ep_name, ep_sts);
-
-	if (ep_sts & EP_STS_SETUP)
-		ret += sprintf(str + ret, "SETUP ");
-	if (ep_sts & EP_STS_IOC)
-		ret += sprintf(str + ret, "IOC ");
-	if (ep_sts & EP_STS_ISP)
-		ret += sprintf(str + ret, "ISP ");
-	if (ep_sts & EP_STS_DESCMIS)
-		ret += sprintf(str + ret, "DESCMIS ");
-	if (ep_sts & EP_STS_STREAMR)
-		ret += sprintf(str + ret, "STREAMR ");
-	if (ep_sts & EP_STS_MD_EXIT)
-		ret += sprintf(str + ret, "MD_EXIT ");
-	if (ep_sts & EP_STS_TRBERR)
-		ret += sprintf(str + ret, "TRBERR ");
-	if (ep_sts & EP_STS_NRDY)
-		ret += sprintf(str + ret, "NRDY ");
-	if (ep_sts & EP_STS_PRIME)
-		ret += sprintf(str + ret, "PRIME ");
-	if (ep_sts & EP_STS_SIDERR)
-		ret += sprintf(str + ret, "SIDERRT ");
-	if (ep_sts & EP_STS_OUTSMM)
-		ret += sprintf(str + ret, "OUTSMM ");
-	if (ep_sts & EP_STS_ISOERR)
-		ret += sprintf(str + ret, "ISOERR ");
-	if (ep_sts & EP_STS_IOT)
-		ret += sprintf(str + ret, "IOT ");
-
-	return str;
-}
-
-static inline char *cdns3_decode_epx_irq(char *str,
-					 char *ep_name,
-					 u32 ep_sts)
-{
-	return cdns3_decode_ep_irq(str, ep_sts, ep_name);
-}
-
-static inline char *cdns3_decode_ep0_irq(char *str,
-					 int dir,
-					 u32 ep_sts)
-{
-	return cdns3_decode_ep_irq(str, ep_sts,
-				   dir ? "ep0IN" : "ep0OUT");
-}
-
-/**
- * Debug a transfer ring.
- *
- * Prints out all TRBs in the endpoint ring, even those after the Link TRB.
- *.
- */
-static inline char *cdns3_dbg_ring(struct cdns3_endpoint *priv_ep,
-				   struct cdns3_trb *ring, char *str)
-{
-	dma_addr_t addr = priv_ep->trb_pool_dma;
-	struct cdns3_trb *trb;
-	int trb_per_sector;
-	int ret = 0;
-	int i;
-
-	trb_per_sector = GET_TRBS_PER_SEGMENT(priv_ep->type);
-
-	trb = &priv_ep->trb_pool[priv_ep->dequeue];
-	ret += sprintf(str + ret, "\n\t\tRing contents for %s:", priv_ep->name);
-
-	ret += sprintf(str + ret,
-		       "\n\t\tRing deq index: %d, trb: %p (virt), 0x%llx (dma)\n",
-		       priv_ep->dequeue, trb,
-		       (unsigned long long)cdns3_trb_virt_to_dma(priv_ep, trb));
-
-	trb = &priv_ep->trb_pool[priv_ep->enqueue];
-	ret += sprintf(str + ret,
-		       "\t\tRing enq index: %d, trb: %p (virt), 0x%llx (dma)\n",
-		       priv_ep->enqueue, trb,
-		       (unsigned long long)cdns3_trb_virt_to_dma(priv_ep, trb));
-
-	ret += sprintf(str + ret,
-		       "\t\tfree trbs: %d, CCS=%d, PCS=%d\n",
-		       priv_ep->free_trbs, priv_ep->ccs, priv_ep->pcs);
-
-	if (trb_per_sector > TRBS_PER_SEGMENT)
-		trb_per_sector = TRBS_PER_SEGMENT;
-
-	if (trb_per_sector > TRBS_PER_SEGMENT) {
-		sprintf(str + ret, "\t\tTo big transfer ring %d\n",
-			trb_per_sector);
-		return str;
-	}
-
-	for (i = 0; i < trb_per_sector; ++i) {
-		trb = &ring[i];
-		ret += sprintf(str + ret,
-			"\t\t@%pad %08x %08x %08x\n", &addr,
-			le32_to_cpu(trb->buffer),
-			le32_to_cpu(trb->length),
-			le32_to_cpu(trb->control));
-		addr += sizeof(*trb);
-	}
-
-	return str;
-}
-
-void cdns3_dbg(struct cdns3_device *priv_dev, const char *fmt, ...);
-
-#ifdef CONFIG_DEBUG_FS
-void cdns3_debugfs_init(struct cdns3 *cdns);
-void cdns3_debugfs_exit(struct cdns3 *cdns);
-#else
-void cdns3_debugfs_init(struct cdns3 *cdns);
-{  }
-void cdns3_debugfs_exit(struct cdns3 *cdns);
-{  }
-#endif
-
-#endif /*__LINUX_CDNS3_DEBUG*/

drivers/usb/cdns3/debugfs.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Cadence USBSS DRD Controller DebugFS filer.
- *
- * Copyright (C) 2018-2019 Cadence.
- *
- * Author: Pawel Laszczak <[e-mail]>
- */
-
-#include <linux/types.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-#include <linux/uaccess.h>
-
-#include "core.h"
-#include "gadget.h"
-#include "drd.h"
-
-static const char *const cdns3_mode[] = {
-	[USB_DR_MODE_UNKNOWN]		= "unknown",
-	[USB_DR_MODE_OTG]		= "otg",
-	[USB_DR_MODE_HOST]		= "host",
-	[USB_DR_MODE_PERIPHERAL]	= "device",
-};
-
-static int cdns3_mode_show(struct seq_file *s, void *unused)
-{
-	struct cdns3 *cdns = s->private;
-
-	seq_puts(s, cdns3_mode[cdns->current_dr_mode]);
-
-	return 0;
-}
-
-static int cdns3_mode_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, cdns3_mode_show, inode->i_private);
-}
-
-static ssize_t cdns3_mode_write(struct file *file,
-				const char __user *ubuf,
-				size_t count, loff_t *ppos)
-{
-	struct seq_file	 *s = file->private_data;
-	struct cdns3 *cdns = s->private;
-	char buf[32];
-	int ret;
-
-	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
-		return -EFAULT;
-
-	if (cdns->debug_disable) {
-		dev_err(cdns->dev,
-			"Mode can't be changed when disable is set\n");
-		return -EPERM;
-	}
-
-	ret = match_string(cdns3_mode, ARRAY_SIZE(cdns3_mode), buf);
-	if (ret < 0 || ret == USB_DR_MODE_UNKNOWN) {
-		dev_err(cdns->dev, "Failed: incorrect mode setting\n");
-		return -EINVAL;
-	}
-
-	if (cdns->current_dr_mode != ret) {
-		cdns->desired_dr_mode = ret;
-		cdns3_role_stop(cdns);
-		ret = cdns3_drd_update_mode(cdns);
-		if (ret)
-			return ret;
-
-		queue_work(system_freezable_wq, &cdns->role_switch_wq);
-	}
-
-	return count;
-}
-
-static const struct file_operations cdns3_mode_fops = {
-	.open			= cdns3_mode_open,
-	.write			= cdns3_mode_write,
-	.read			= seq_read,
-	.llseek			= seq_lseek,
-	.release		= single_release,
-};
-
-static int cdns3_disable_show(struct seq_file *s, void *unused)
-{
-	struct cdns3 *cdns = s->private;
-
-	if (!cdns->debug_disable)
-		seq_puts(s, "0\n");
-	else
-		seq_puts(s, "1\n");
-
-	return 0;
-}
-
-static ssize_t cdns3_disable_write(struct file *file,
-				   const char __user *ubuf,
-				   size_t count, loff_t *ppos)
-{
-	struct seq_file	 *s = file->private_data;
-	struct cdns3 *cdns = s->private;
-	bool disable;
-	char buf[16];
-
-	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
-		return -EFAULT;
-
-	if (kstrtobool(buf, &disable)) {
-		dev_err(cdns->dev, "wrong setting\n");
-		return -EINVAL;
-	}
-
-	if (disable != cdns->debug_disable) {
-		cdns->debug_disable = disable;
-		queue_work(system_freezable_wq, &cdns->role_switch_wq);
-	}
-
-	return count;
-}
-
-static int cdns3_disable_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, cdns3_disable_show, inode->i_private);
-}
-
-static const struct file_operations cdns3_disable_fops = {
-	.open			= cdns3_disable_open,
-	.write			= cdns3_disable_write,
-	.read			= seq_read,
-	.llseek			= seq_lseek,
-	.release		= single_release,
-};
-
-void cdns3_debugfs_init(struct cdns3 *cdns)
-{
-	struct dentry *root;
-
-	root = debugfs_create_dir(dev_name(cdns->dev), NULL);
-	cdns->root = root;
-	if (IS_ENABLED(CONFIG_USB_CDNS3_GADGET) &&
-	    IS_ENABLED(CONFIG_USB_CDNS3_HOST))
-		debugfs_create_file("mode", 0644, root, cdns,
-				    &cdns3_mode_fops);
-
-	debugfs_create_file("disable", 0644, root, cdns,
-			    &cdns3_disable_fops);
-}
-
-void cdns3_debugfs_exit(struct cdns3 *cdns)
-{
-	debugfs_remove_recursive(cdns->root);
-}

drivers/usb/cdns3/drd.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Cadence USBSS DRD Driver.
- *
- * Copyright (C) 2018-2019 Cadence.
- * Copyright (C) 2019 Texas Instruments
- *
- * Author: Pawel Laszczak <[e-mail]>
- *         Roger Quadros <[e-mail]>
- *
- *
- */
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/usb/otg.h>
-
-#include "gadget.h"
-#include "drd.h"
-#include "core.h"
-
-/**
- * cdns3_set_mode - change mode of OTG Core
- * @cdns: pointer to context structure
- * @mode: selected mode from cdns_role
- *
- * Returns 0 on success otherwise negative errno
- */
-int cdns3_set_mode(struct cdns3 *cdns, enum usb_dr_mode mode)
-{
-	int ret = 0;
-	u32 reg;
-
-	cdns->current_dr_mode = mode;
-
-	switch (mode) {
-	case USB_DR_MODE_PERIPHERAL:
-		break;
-	case USB_DR_MODE_HOST:
-		break;
-	case USB_DR_MODE_OTG:
-		dev_dbg(cdns->dev, "Set controller to OTG mode\n");
-		if (cdns->version == CDNS3_CONTROLLER_V1) {
-			reg = readl(&cdns->otg_v1_regs->override);
-			reg |= OVERRIDE_IDPULLUP;
-			writel(reg, &cdns->otg_v1_regs->override);
-		} else {
-			reg = readl(&cdns->otg_v0_regs->ctrl1);
-			reg |= OVERRIDE_IDPULLUP_V0;
-			writel(reg, &cdns->otg_v0_regs->ctrl1);
-		}
-
-		/*
-		 * Hardware specification says: "ID_VALUE must be valid within
-		 * 50ms after idpullup is set to '1" so driver must wait
-		 * 50ms before reading this pin.
-		 */
-		usleep_range(50000, 60000);
-		break;
-	default:
-		cdns->current_dr_mode = USB_DR_MODE_UNKNOWN;
-		dev_err(cdns->dev, "Unsupported mode of operation %d\n", mode);
-		return -EINVAL;
-	}
-
-	return ret;
-}
-
-int cdns3_get_id(struct cdns3 *cdns)
-{
-	int id;
-
-	id = readl(&cdns->otg_regs->sts) & OTGSTS_ID_VALUE;
-	dev_dbg(cdns->dev, "OTG ID: %d", id);
-
-	return id;
-}
-
-int cdns3_get_vbus(struct cdns3 *cdns)
-{
-	int vbus;
-
-	vbus = !!(readl(&cdns->otg_regs->sts) & OTGSTS_VBUS_VALID);
-	dev_dbg(cdns->dev, "OTG VBUS: %d", vbus);
-	return vbus;
-}
-
-int cdns3_is_host(struct cdns3 *cdns)
-{
-	if (cdns->current_dr_mode == USB_DR_MODE_HOST)
-		return 1;
-	else if (!cdns3_get_id(cdns))
-		return 1;
-
-	return 0;
-}
-
-int cdns3_is_device(struct cdns3 *cdns)
-{
-	if (cdns->current_dr_mode == USB_DR_MODE_PERIPHERAL)
-		return 1;
-	else if (cdns->current_dr_mode == USB_DR_MODE_OTG)
-		if (cdns3_get_id(cdns))
-			return 1;
-
-	return 0;
-}
-
-/**
- * cdns3_otg_disable_irq - Disable all OTG interrupts
- * @cdns: Pointer to controller context structure
- */
-static void cdns3_otg_disable_irq(struct cdns3 *cdns)
-{
-	writel(0, &cdns->otg_regs->ien);
-}
-
-/**
- * cdns3_otg_enable_irq - enable id and sess_valid interrupts
- * @cdns: Pointer to controller context structure
- */
-static void cdns3_otg_enable_irq(struct cdns3 *cdns)
-{
-	writel(OTGIEN_ID_CHANGE_INT | OTGIEN_VBUSVALID_RISE_INT |
-	       OTGIEN_VBUSVALID_FALL_INT, &cdns->otg_regs->ien);
-}
-
-/**
- * cdns3_drd_switch_host - start/stop host
- * @cdns: Pointer to controller context structure
- * @on: 1 for start, 0 for stop
- *
- * Returns 0 on success otherwise negative errno
- */
-int cdns3_drd_switch_host(struct cdns3 *cdns, int on)
-{
-	int ret;
-	u32 reg = OTGCMD_OTG_DIS;
-
-	/* switch OTG core */
-	if (on) {
-		writel(OTGCMD_HOST_BUS_REQ | reg, &cdns->otg_regs->cmd);
-
-		dev_dbg(cdns->dev, "Waiting till Host mode is turned on\n");
-		ret = cdns3_handshake(&cdns->otg_regs->sts, OTGSTS_XHCI_READY,
-				      OTGSTS_XHCI_READY, 100000);
-
-		if (ret) {
-			dev_err(cdns->dev, "timeout waiting for xhci_ready\n");
-			return ret;
-		}
-	} else {
-		writel(OTGCMD_HOST_BUS_DROP | OTGCMD_DEV_BUS_DROP |
-		       OTGCMD_DEV_POWER_OFF | OTGCMD_HOST_POWER_OFF,
-		       &cdns->otg_regs->cmd);
-		/* Waiting till H_IDLE state.*/
-		cdns3_handshake(&cdns->otg_regs->state,
-				OTGSTATE_HOST_STATE_MASK,
-				0, 2000000);
-	}
-
-	return 0;
-}
-
-/**
- * cdns3_drd_switch_gadget - start/stop gadget
- * @cdns: Pointer to controller context structure
- * @on: 1 for start, 0 for stop
- *
- * Returns 0 on success otherwise negative errno
- */
-int cdns3_drd_switch_gadget(struct cdns3 *cdns, int on)
-{
-	int ret;
-	u32 reg = OTGCMD_OTG_DIS;
-
-	/* switch OTG core */
-	if (on) {
-		writel(OTGCMD_DEV_BUS_REQ | reg, &cdns->otg_regs->cmd);
-
-		dev_dbg(cdns->dev, "Waiting till Device mode is turned on\n");
-
-		ret = cdns3_handshake(&cdns->otg_regs->sts, OTGSTS_DEV_READY,
-				      OTGSTS_DEV_READY, 100000);
-
-		if (ret) {
-			dev_err(cdns->dev, "timeout waiting for dev_ready\n");
-			return ret;
-		}
-	} else {
-		/*
-		 * driver should wait at least 10us after disabling Device
-		 * before turning-off Device (DEV_BUS_DROP)
-		 */
-		usleep_range(20, 30);
-		writel(OTGCMD_HOST_BUS_DROP | OTGCMD_DEV_BUS_DROP |
-		       OTGCMD_DEV_POWER_OFF | OTGCMD_HOST_POWER_OFF,
-		       &cdns->otg_regs->cmd);
-		/* Waiting till DEV_IDLE state.*/
-		cdns3_handshake(&cdns->otg_regs->state, OTGSTATE_DEV_STATE_MASK,
-				0, 2000000);
-	}
-
-	return 0;
-}
-
-/**
- * cdns3_init_otg_mode - initialize drd controller
- * @cdns: Pointer to controller context structure
- *
- * Returns 0 on success otherwise negative errno
- */
-static int cdns3_init_otg_mode(struct cdns3 *cdns)
-{
-	int ret = 0;
-
-	cdns3_otg_disable_irq(cdns);
-	/* clear all interrupts */
-	writel(~0, &cdns->otg_regs->ivect);
-
-	ret = cdns3_set_mode(cdns, USB_DR_MODE_OTG);
-	if (ret)
-		return ret;
-
-	cdns3_otg_enable_irq(cdns);
-	return ret;
-}
-
-/**
- * cdns3_drd_update_mode - initialize mode of operation
- * @cdns: Pointer to controller context structure
- *
- * Returns 0 on success otherwise negative errno
- */
-int cdns3_drd_update_mode(struct cdns3 *cdns)
-{
-	int ret = 0;
-
-	if (cdns->desired_dr_mode == cdns->current_dr_mode)
-		return ret;
-
-	switch (cdns->desired_dr_mode) {
-	case USB_DR_MODE_PERIPHERAL:
-		ret = cdns3_set_mode(cdns, USB_DR_MODE_PERIPHERAL);
-		break;
-	case USB_DR_MODE_HOST:
-		ret = cdns3_set_mode(cdns, USB_DR_MODE_HOST);
-		break;
-	case USB_DR_MODE_OTG:
-		ret = cdns3_init_otg_mode(cdns);
-		break;
-	default:
-		dev_err(cdns->dev, "Unsupported mode of operation %d\n",
-			cdns->dr_mode);
-		return -EINVAL;
-	}
-
-	return ret;
-}
-
-/**
- * cdns3_drd_irq - interrupt handler for OTG events
- *
- * @irq: irq number for cdns3 core device
- * @data: structure of cdns3
- *
- * Returns IRQ_HANDLED or IRQ_NONE
- */
-static irqreturn_t cdns3_drd_irq(int irq, void *data)
-{
-	irqreturn_t ret = IRQ_NONE;
-	struct cdns3 *cdns = data;
-	u32 reg;
-
-	if (cdns->dr_mode != USB_DR_MODE_OTG)
-		return ret;
-
-	reg = readl(&cdns->otg_regs->ivect);
-
-	if (!reg)
-		return ret;
-
-	if (reg & OTGIEN_ID_CHANGE_INT) {
-		dev_dbg(cdns->dev, "OTG IRQ: new ID: %d\n",
-			cdns3_get_id(cdns));
-
-		ret = IRQ_HANDLED;
-	}
-
-	if (reg & (OTGIEN_VBUSVALID_RISE_INT | OTGIEN_VBUSVALID_FALL_INT)) {
-		dev_dbg(cdns->dev, "OTG IRQ: new VBUS: %d\n",
-			cdns3_get_vbus(cdns));
-
-		ret = IRQ_HANDLED;
-	}
-
-	if (ret == IRQ_HANDLED)
-		queue_work(system_freezable_wq, &cdns->role_switch_wq);
-
-	writel(~0, &cdns->otg_regs->ivect);
-	return ret;
-}
-
-int cdns3_drd_init(struct cdns3 *cdns)
-{
-	void __iomem *regs;
-	int ret = 0;
-	u32 state;
-
-	regs = devm_ioremap_resource(cdns->dev, &cdns->otg_res);
-	if (IS_ERR(regs))
-		return PTR_ERR(regs);
-
-	/* Detection of DRD version. Controller has been released
-	 * in two versions. Both are similar, but they have same changes
-	 * in register maps.
-	 * The first register in old version is command register and it's read
-	 * only, so driver should read 0 from it. On the other hand, in v1
-	 * the first register contains device ID number which is not set to 0.
-	 * Driver uses this fact to detect the proper version of
-	 * controller.
-	 */
-	cdns->otg_v0_regs = regs;
-	if (!readl(&cdns->otg_v0_regs->cmd)) {
-		cdns->version  = CDNS3_CONTROLLER_V0;
-		cdns->otg_v1_regs = NULL;
-		cdns->otg_regs = regs;
-		writel(1, &cdns->otg_v0_regs->simulate);
-		dev_info(cdns->dev, "DRD version v0 (%08x)\n",
-			 readl(&cdns->otg_v0_regs->version));
-	} else {
-		cdns->otg_v0_regs = NULL;
-		cdns->otg_v1_regs = regs;
-		cdns->otg_regs = (void *)&cdns->otg_v1_regs->cmd;
-		cdns->version  = CDNS3_CONTROLLER_V1;
-		writel(1, &cdns->otg_v1_regs->simulate);
-		dev_info(cdns->dev, "DRD version v1 (ID: %08x, rev: %08x)\n",
-			 readl(&cdns->otg_v1_regs->did),
-			 readl(&cdns->otg_v1_regs->rid));
-	}
-
-	state = OTGSTS_STRAP(readl(&cdns->otg_regs->sts));
-
-	/* Update dr_mode according to STRAP configuration. */
-	cdns->dr_mode = USB_DR_MODE_OTG;
-	if (state == OTGSTS_STRAP_HOST) {
-		dev_dbg(cdns->dev, "Controller strapped to HOST\n");
-		cdns->dr_mode = USB_DR_MODE_HOST;
-	} else if (state == OTGSTS_STRAP_GADGET) {
-		dev_dbg(cdns->dev, "Controller strapped to PERIPHERAL\n");
-		cdns->dr_mode = USB_DR_MODE_PERIPHERAL;
-	}
-
-	cdns->desired_dr_mode = cdns->dr_mode;
-	cdns->current_dr_mode = USB_DR_MODE_UNKNOWN;
-
-	ret = devm_request_threaded_irq(cdns->dev, cdns->otg_irq,
-					cdns3_drd_irq,
-					NULL, IRQF_SHARED,
-					dev_name(cdns->dev), cdns);
-
-	if (ret) {
-		dev_err(cdns->dev, "couldn't get otg_irq\n");
-		return ret;
-	}
-
-	state = readl(&cdns->otg_regs->sts);
-	if (OTGSTS_OTG_NRDY(state) != 0) {
-		dev_err(cdns->dev, "Cadence USB3 OTG device not ready\n");
-		return -ENODEV;
-	}
-
-	return ret;
-}
-
-int cdns3_drd_exit(struct cdns3 *cdns)
-{
-	return 0;
-}

drivers/usb/cdns3/drd.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Cadence USB3 DRD header file.
- *
- * Copyright (C) 2018-2019 Cadence.
- *
- * Author: Pawel Laszczak <[e-mail]>
- */
-#ifndef __LINUX_CDNS3_DRD
-#define __LINUX_CDNS3_DRD
-
-#include <linux/usb/otg.h>
-#include <linux/phy/phy.h>
-#include "core.h"
-
-/*  DRD register interface for version v1. */
-struct cdns3_otg_regs {
-	__le32 did;
-	__le32 rid;
-	__le32 capabilities;
-	__le32 reserved1;
-	__le32 cmd;
-	__le32 sts;
-	__le32 state;
-	__le32 reserved2;
-	__le32 ien;
-	__le32 ivect;
-	__le32 refclk;
-	__le32 tmr;
-	__le32 reserved3[4];
-	__le32 simulate;
-	__le32 override;
-	__le32 susp_ctrl;
-	__le32 reserved4;
-	__le32 anasts;
-	__le32 adp_ramp_time;
-	__le32 ctrl1;
-	__le32 ctrl2;
-};
-
-/*  DRD register interface for version v0. */
-struct cdns3_otg_legacy_regs {
-	__le32 cmd;
-	__le32 sts;
-	__le32 state;
-	__le32 refclk;
-	__le32 ien;
-	__le32 ivect;
-	__le32 reserved1[3];
-	__le32 tmr;
-	__le32 reserved2[2];
-	__le32 version;
-	__le32 capabilities;
-	__le32 reserved3[2];
-	__le32 simulate;
-	__le32 reserved4[5];
-	__le32 ctrl1;
-};
-
-/*
- * Common registers interface for both version of DRD.
- */
-struct cdns3_otg_common_regs {
-	__le32 cmd;
-	__le32 sts;
-	__le32 state;
-	__le32 different1;
-	__le32 ien;
-	__le32 ivect;
-};
-
-/* CDNS_RID - bitmasks */
-#define CDNS_RID(p)			((p) & GENMASK(15, 0))
-
-/* CDNS_VID - bitmasks */
-#define CDNS_DID(p)			((p) & GENMASK(31, 0))
-
-/* OTGCMD - bitmasks */
-/* "Request the bus for Device mode. */
-#define OTGCMD_DEV_BUS_REQ		BIT(0)
-/* Request the bus for Host mode */
-#define OTGCMD_HOST_BUS_REQ		BIT(1)
-/* Enable OTG mode. */
-#define OTGCMD_OTG_EN			BIT(2)
-/* Disable OTG mode */
-#define OTGCMD_OTG_DIS			BIT(3)
-/*"Configure OTG as A-Device. */
-#define OTGCMD_A_DEV_EN			BIT(4)
-/*"Configure OTG as A-Device. */
-#define OTGCMD_A_DEV_DIS		BIT(5)
-/* Drop the bus for Device mod	e. */
-#define OTGCMD_DEV_BUS_DROP		BIT(8)
-/* Drop the bus for Host mode*/
-#define OTGCMD_HOST_BUS_DROP		BIT(9)
-/* Power Down USBSS-DEV. */
-#define OTGCMD_DEV_POWER_OFF		BIT(11)
-/* Power Down CDNSXHCI. */
-#define OTGCMD_HOST_POWER_OFF		BIT(12)
-
-/* OTGIEN - bitmasks */
-/* ID change interrupt enable */
-#define OTGIEN_ID_CHANGE_INT		BIT(0)
-/* Vbusvalid fall detected interrupt enable.*/
-#define OTGIEN_VBUSVALID_RISE_INT	BIT(4)
-/* Vbusvalid fall detected interrupt enable */
-#define OTGIEN_VBUSVALID_FALL_INT	BIT(5)
-
-/* OTGSTS - bitmasks */
-/*
- * Current value of the ID pin. It is only valid when idpullup in
- *  OTGCTRL1_TYPE register is set to '1'.
- */
-#define OTGSTS_ID_VALUE			BIT(0)
-/* Current value of the vbus_valid */
-#define OTGSTS_VBUS_VALID		BIT(1)
-/* Current value of the b_sess_vld */
-#define OTGSTS_SESSION_VALID		BIT(2)
-/*Device mode is active*/
-#define OTGSTS_DEV_ACTIVE		BIT(3)
-/* Host mode is active. */
-#define OTGSTS_HOST_ACTIVE		BIT(4)
-/* OTG Controller not ready. */
-#define OTGSTS_OTG_NRDY_MASK		BIT(11)
-#define OTGSTS_OTG_NRDY(p)		((p) & OTGSTS_OTG_NRDY_MASK)
-/*
- * Value of the strap pins.
- * 000 - no default configuration
- * 010 - Controller initiall configured as Host
- * 100 - Controller initially configured as Device
- */
-#define OTGSTS_STRAP(p)			(((p) & GENMASK(14, 12)) >> 12)
-#define OTGSTS_STRAP_NO_DEFAULT_CFG	0x00
-#define OTGSTS_STRAP_HOST_OTG		0x01
-#define OTGSTS_STRAP_HOST		0x02
-#define OTGSTS_STRAP_GADGET		0x04
-/* Host mode is turned on. */
-#define OTGSTS_XHCI_READY		BIT(26)
-/* "Device mode is turned on .*/
-#define OTGSTS_DEV_READY		BIT(27)
-
-/* OTGSTATE- bitmasks */
-#define OTGSTATE_DEV_STATE_MASK		GENMASK(2, 0)
-#define OTGSTATE_HOST_STATE_MASK	GENMASK(5, 3)
-#define OTGSTATE_HOST_STATE_IDLE	0x0
-#define OTGSTATE_HOST_STATE_VBUS_FALL	0x7
-#define OTGSTATE_HOST_STATE(p)		(((p) & OTGSTATE_HOST_STATE_MASK) >> 3)
-
-/* OTGREFCLK - bitmasks */
-#define OTGREFCLK_STB_CLK_SWITCH_EN	BIT(31)
-
-/* OVERRIDE - bitmasks */
-#define OVERRIDE_IDPULLUP		BIT(0)
-/* Only for CDNS3_CONTROLLER_V0 version */
-#define OVERRIDE_IDPULLUP_V0		BIT(24)
-
-int cdns3_is_host(struct cdns3 *cdns);
-int cdns3_is_device(struct cdns3 *cdns);
-int cdns3_get_id(struct cdns3 *cdns);
-int cdns3_get_vbus(struct cdns3 *cdns);
-int cdns3_drd_init(struct cdns3 *cdns);
-int cdns3_drd_exit(struct cdns3 *cdns);
-int cdns3_drd_update_mode(struct cdns3 *cdns);
-int cdns3_drd_switch_gadget(struct cdns3 *cdns, int on);
-int cdns3_drd_switch_host(struct cdns3 *cdns, int on);
-
-#endif /* __LINUX_CDNS3_DRD */

drivers/usb/cdns3/ep0.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Cadence USBSS DRD Driver - gadget side.
- *
- * Copyright (C) 2018 Cadence Design Systems.
- * Copyright (C) 2017-2018 NXP
- *
- * Authors: Pawel Jez <[e-mail]>,
- *          Pawel Laszczak <[e-mail]>
- *          Peter Chen <[e-mail]>
- */
-
-#include <linux/usb/composite.h>
-
-#include "gadget.h"
-#include "trace.h"
-
-static struct usb_endpoint_descriptor cdns3_gadget_ep0_desc = {
-	.bLength = USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType = USB_DT_ENDPOINT,
-	.bmAttributes =	USB_ENDPOINT_XFER_CONTROL,
-};
-
-/**
- * cdns3_ep0_run_transfer - Do transfer on default endpoint hardware
- * @priv_dev: extended gadget object
- * @dma_addr: physical address where data is/will be stored
- * @length: data length
- * @erdy: set it to 1 when ERDY packet should be sent -
- *        exit from flow control state
- */
-static void cdns3_ep0_run_transfer(struct cdns3_device *priv_dev,
-				   dma_addr_t dma_addr,
-				   unsigned int length, int erdy, int zlp)
-{
-	struct cdns3_usb_regs __iomem *regs = priv_dev->regs;
-	struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
-
-	priv_ep->trb_pool[0].buffer = TRB_BUFFER(dma_addr);
-	priv_ep->trb_pool[0].length = TRB_LEN(length);
-
-	if (zlp) {
-		priv_ep->trb_pool[0].control = TRB_CYCLE | TRB_TYPE(TRB_NORMAL);
-		priv_ep->trb_pool[1].buffer = TRB_BUFFER(dma_addr);
-		priv_ep->trb_pool[1].length = TRB_LEN(0);
-		priv_ep->trb_pool[1].control = TRB_CYCLE | TRB_IOC |
-		    TRB_TYPE(TRB_NORMAL);
-	} else {
-		priv_ep->trb_pool[0].control = TRB_CYCLE | TRB_IOC |
-		    TRB_TYPE(TRB_NORMAL);
-		priv_ep->trb_pool[1].control = 0;
-	}
-
-	trace_cdns3_prepare_trb(priv_ep, priv_ep->trb_pool);
-
-	cdns3_select_ep(priv_dev, priv_dev->ep0_data_dir);
-
-	writel(EP_STS_TRBERR, &regs->ep_sts);
-	writel(EP_TRADDR_TRADDR(priv_ep->trb_pool_dma), &regs->ep_traddr);
-	trace_cdns3_doorbell_ep0(priv_dev->ep0_data_dir ? "ep0in" : "ep0out",
-				 readl(&regs->ep_traddr));
-
-	/* TRB should be prepared before starting transfer. */
-	writel(EP_CMD_DRDY, &regs->ep_cmd);
-
-	/* Resume controller before arming transfer. */
-	__cdns3_gadget_wakeup(priv_dev);
-
-	if (erdy)
-		writel(EP_CMD_ERDY, &priv_dev->regs->ep_cmd);
-}
-
-/**
- * cdns3_ep0_delegate_req - Returns status of handling setup packet
- * Setup is handled by gadget driver
- * @priv_dev: extended gadget object
- * @ctrl_req: pointer to received setup packet
- *
- * Returns zero on success or negative value on failure
- */
-static int cdns3_ep0_delegate_req(struct cdns3_device *priv_dev,
-				  struct usb_ctrlrequest *ctrl_req)
-{
-	int ret;
-
-	spin_unlock(&priv_dev->lock);
-	priv_dev->setup_pending = 1;
-	ret = priv_dev->gadget_driver->setup(&priv_dev->gadget, ctrl_req);
-	priv_dev->setup_pending = 0;
-	spin_lock(&priv_dev->lock);
-	return ret;
-}
-
-static void cdns3_prepare_setup_packet(struct cdns3_device *priv_dev)
-{
-	priv_dev->ep0_data_dir = 0;
-	priv_dev->ep0_stage = CDNS3_SETUP_STAGE;
-	cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma,
-			       sizeof(struct usb_ctrlrequest), 0, 0);
-}
-
-static void cdns3_ep0_complete_setup(struct cdns3_device *priv_dev,
-				     u8 send_stall, u8 send_erdy)
-{
-	struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
-	struct usb_request *request;
-
-	request = cdns3_next_request(&priv_ep->pending_req_list);
-	if (request)
-		list_del_init(&request->list);
-
-	if (send_stall) {
-		cdns3_dbg(priv_ep->cdns3_dev, "STALL for ep0\n");
-		/* set_stall on ep0 */
-		cdns3_select_ep(priv_dev, 0x00);
-		writel(EP_CMD_SSTALL, &priv_dev->regs->ep_cmd);
-	} else {
-		cdns3_prepare_setup_packet(priv_dev);
-	}
-
-	priv_dev->ep0_stage = CDNS3_SETUP_STAGE;
-	writel((send_erdy ? EP_CMD_ERDY : 0) | EP_CMD_REQ_CMPL,
-	       &priv_dev->regs->ep_cmd);
-
-	cdns3_allow_enable_l1(priv_dev, 1);
-}
-
-/**
- * cdns3_req_ep0_set_configuration - Handling of SET_CONFIG standard USB request
- * @priv_dev: extended gadget object
- * @ctrl_req: pointer to received setup packet
- *
- * Returns 0 if success, USB_GADGET_DELAYED_STATUS on deferred status stage,
- * error code on error
- */
-static int cdns3_req_ep0_set_configuration(struct cdns3_device *priv_dev,
-					   struct usb_ctrlrequest *ctrl_req)
-{
-	enum usb_device_state device_state = priv_dev->gadget.state;
-	struct cdns3_endpoint *priv_ep;
-	u32 config = le16_to_cpu(ctrl_req->wValue);
-	int result = 0;
-	int i;
-
-	switch (device_state) {
-	case USB_STATE_ADDRESS:
-		/* Configure non-control EPs */
-		for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) {
-			priv_ep = priv_dev->eps[i];
-			if (!priv_ep)
-				continue;
-
-			if (priv_ep->flags & EP_CLAIMED)
-				cdns3_ep_config(priv_ep);
-		}
-
-		result = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
-
-		if (result)
-			return result;
-
-		if (config) {
-			cdns3_set_hw_configuration(priv_dev);
-		} else {
-			cdns3_hw_reset_eps_config(priv_dev);
-			usb_gadget_set_state(&priv_dev->gadget,
-					     USB_STATE_ADDRESS);
-		}
-		break;
-	case USB_STATE_CONFIGURED:
-		result = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
-
-		if (!config && !result) {
-			cdns3_hw_reset_eps_config(priv_dev);
-			usb_gadget_set_state(&priv_dev->gadget,
-					     USB_STATE_ADDRESS);
-		}
-		break;
-	default:
-		result = -EINVAL;
-	}
-
-	return result;
-}
-
-/**
- * cdns3_req_ep0_set_address - Handling of SET_ADDRESS standard USB request
- * @priv_dev: extended gadget object
- * @ctrl_req: pointer to received setup packet
- *
- * Returns 0 if success, error code on error
- */
-static int cdns3_req_ep0_set_address(struct cdns3_device *priv_dev,
-				     struct usb_ctrlrequest *ctrl_req)
-{
-	enum usb_device_state device_state = priv_dev->gadget.state;
-	u32 reg;
-	u32 addr;
-
-	addr = le16_to_cpu(ctrl_req->wValue);
-
-	if (addr > USB_DEVICE_MAX_ADDRESS) {
-		dev_err(priv_dev->dev,
-			"Device address (%d) cannot be greater than %d\n",
-			addr, USB_DEVICE_MAX_ADDRESS);
-		return -EINVAL;
-	}
-
-	if (device_state == USB_STATE_CONFIGURED) {
-		dev_err(priv_dev->dev,
-			"can't set_address from configured state\n");
-		return -EINVAL;
-	}
-
-	reg = readl(&priv_dev->regs->usb_cmd);
-
-	writel(reg | USB_CMD_FADDR(addr) | USB_CMD_SET_ADDR,
-	       &priv_dev->regs->usb_cmd);
-
-	usb_gadget_set_state(&priv_dev->gadget,
-			     (addr ? USB_STATE_ADDRESS : USB_STATE_DEFAULT));
-
-	return 0;
-}
-
-/**
- * cdns3_req_ep0_get_status - Handling of GET_STATUS standard USB request
- * @priv_dev: extended gadget object
- * @ctrl_req: pointer to received setup packet
- *
- * Returns 0 if success, error code on error
- */
-static int cdns3_req_ep0_get_status(struct cdns3_device *priv_dev,
-				    struct usb_ctrlrequest *ctrl)
-{
-	__le16 *response_pkt;
-	u16 usb_status = 0;
-	u32 recip;
-	u32 reg;
-
-	recip = ctrl->bRequestType & USB_RECIP_MASK;
-
-	switch (recip) {
-	case USB_RECIP_DEVICE:
-		/* self powered */
-		if (priv_dev->is_selfpowered)
-			usb_status = BIT(USB_DEVICE_SELF_POWERED);
-
-		if (priv_dev->wake_up_flag)
-			usb_status |= BIT(USB_DEVICE_REMOTE_WAKEUP);
-
-		if (priv_dev->gadget.speed != USB_SPEED_SUPER)
-			break;
-
-		reg = readl(&priv_dev->regs->usb_sts);
-
-		if (priv_dev->u1_allowed)
-			usb_status |= BIT(USB_DEV_STAT_U1_ENABLED);
-
-		if (priv_dev->u2_allowed)
-			usb_status |= BIT(USB_DEV_STAT_U2_ENABLED);
-
-		break;
-	case USB_RECIP_INTERFACE:
-		return cdns3_ep0_delegate_req(priv_dev, ctrl);
-	case USB_RECIP_ENDPOINT:
-		/* check if endpoint is stalled */
-		cdns3_select_ep(priv_dev, ctrl->wIndex);
-		if (EP_STS_STALL(readl(&priv_dev->regs->ep_sts)))
-			usb_status =  BIT(USB_ENDPOINT_HALT);
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	response_pkt = (__le16 *)priv_dev->setup_buf;
-	*response_pkt = cpu_to_le16(usb_status);
-
-	cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma,
-			       sizeof(*response_pkt), 1, 0);
-	return 0;
-}
-
-static int cdns3_ep0_feature_handle_device(struct cdns3_device *priv_dev,
-					   struct usb_ctrlrequest *ctrl,
-					   int set)
-{
-	enum usb_device_state state;
-	enum usb_device_speed speed;
-	int ret = 0;
-	u32 wValue;
-	u32 wIndex;
-	u16 tmode;
-
-	wValue = le16_to_cpu(ctrl->wValue);
-	wIndex = le16_to_cpu(ctrl->wIndex);
-	state = priv_dev->gadget.state;
-	speed = priv_dev->gadget.speed;
-
-	switch (ctrl->wValue) {
-	case USB_DEVICE_REMOTE_WAKEUP:
-		priv_dev->wake_up_flag = !!set;
-		break;
-	case USB_DEVICE_U1_ENABLE:
-		if (state != USB_STATE_CONFIGURED || speed != USB_SPEED_SUPER)
-			return -EINVAL;
-
-		priv_dev->u1_allowed = !!set;
-		break;
-	case USB_DEVICE_U2_ENABLE:
-		if (state != USB_STATE_CONFIGURED || speed != USB_SPEED_SUPER)
-			return -EINVAL;
-
-		priv_dev->u2_allowed = !!set;
-		break;
-	case USB_DEVICE_LTM_ENABLE:
-		ret = -EINVAL;
-		break;
-	case USB_DEVICE_TEST_MODE:
-		if (state != USB_STATE_CONFIGURED || speed > USB_SPEED_HIGH)
-			return -EINVAL;
-
-		tmode = le16_to_cpu(ctrl->wIndex);
-
-		if (!set || (tmode & 0xff) != 0)
-			return -EINVAL;
-
-		switch (tmode >> 8) {
-		case TEST_J:
-		case TEST_K:
-		case TEST_SE0_NAK:
-		case TEST_PACKET:
-			cdns3_ep0_complete_setup(priv_dev, 0, 1);
-			/**
-			 *  Little delay to give the controller some time
-			 * for sending status stage.
-			 * This time should be less then 3ms.
-			 */
-			usleep_range(1000, 2000);
-			cdns3_set_register_bit(&priv_dev->regs->usb_cmd,
-					       USB_CMD_STMODE |
-					       USB_STS_TMODE_SEL(tmode - 1));
-			break;
-		default:
-			ret = -EINVAL;
-		}
-		break;
-	default:
-		ret = -EINVAL;
-	}
-
-	return ret;
-}
-
-static int cdns3_ep0_feature_handle_intf(struct cdns3_device *priv_dev,
-					 struct usb_ctrlrequest *ctrl,
-					 int set)
-{
-	u32 wValue;
-	int ret = 0;
-
-	wValue = le16_to_cpu(ctrl->wValue);
-
-	switch (wValue) {
-	case USB_INTRF_FUNC_SUSPEND:
-		break;
-	default:
-		ret = -EINVAL;
-	}
-
-	return ret;
-}
-
-static int cdns3_ep0_feature_handle_endpoint(struct cdns3_device *priv_dev,
-					     struct usb_ctrlrequest *ctrl,
-					     int set)
-{
-	struct cdns3_endpoint *priv_ep;
-	int ret = 0;
-	u8 index;
-
-	if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT)
-		return -EINVAL;
-
-	if (!(ctrl->wIndex & ~USB_DIR_IN))
-		return 0;
-
-	index = cdns3_ep_addr_to_index(ctrl->wIndex);
-	priv_ep = priv_dev->eps[index];
-
-	cdns3_select_ep(priv_dev, ctrl->wIndex);
-
-	if (set) {
-		cdns3_dbg(priv_ep->cdns3_dev, "Stall endpoint %s\n",
-			  priv_ep->name);
-		writel(EP_CMD_SSTALL, &priv_dev->regs->ep_cmd);
-		priv_ep->flags |= EP_STALL;
-	} else {
-		struct usb_request *request;
-
-		if (priv_dev->eps[index]->flags & EP_WEDGE) {
-			cdns3_select_ep(priv_dev, 0x00);
-			return 0;
-		}
-
-		cdns3_dbg(priv_ep->cdns3_dev, "Clear Stalled endpoint %s\n",
-			  priv_ep->name);
-
-		writel(EP_CMD_CSTALL | EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
-
-		/* wait for EPRST cleared */
-		ret = cdns3_handshake(&priv_dev->regs->ep_cmd,
-				      EP_CMD_EPRST, 0, 100);
-		if (ret)
-			return -EINVAL;
-
-		priv_ep->flags &= ~EP_STALL;
-
-		request = cdns3_next_request(&priv_ep->pending_req_list);
-		if (request) {
-			cdns3_dbg(priv_ep->cdns3_dev, "Resume transfer for %s\n",
-				  priv_ep->name);
-
-			cdns3_rearm_transfer(priv_ep, 1);
-		}
-	}
-
-	return ret;
-}
-
-/**
- * cdns3_req_ep0_handle_feature -
- * Handling of GET/SET_FEATURE standard USB request
- *
- * @priv_dev: extended gadget object
- * @ctrl_req: pointer to received setup packet
- * @set: must be set to 1 for SET_FEATURE request
- *
- * Returns 0 if success, error code on error
- */
-static int cdns3_req_ep0_handle_feature(struct cdns3_device *priv_dev,
-					struct usb_ctrlrequest *ctrl,
-					int set)
-{
-	int ret = 0;
-	u32 recip;
-
-	recip = ctrl->bRequestType & USB_RECIP_MASK;
-
-	switch (recip) {
-	case USB_RECIP_DEVICE:
-		ret = cdns3_ep0_feature_handle_device(priv_dev, ctrl, set);
-		break;
-	case USB_RECIP_INTERFACE:
-		ret = cdns3_ep0_feature_handle_intf(priv_dev, ctrl, set);
-		break;
-	case USB_RECIP_ENDPOINT:
-		ret = cdns3_ep0_feature_handle_endpoint(priv_dev, ctrl, set);
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	return ret;
-}
-
-/**
- * cdns3_req_ep0_set_sel - Handling of SET_SEL standard USB request
- * @priv_dev: extended gadget object
- * @ctrl_req: pointer to received setup packet
- *
- * Returns 0 if success, error code on error
- */
-static int cdns3_req_ep0_set_sel(struct cdns3_device *priv_dev,
-				 struct usb_ctrlrequest *ctrl_req)
-{
-	if (priv_dev->gadget.state < USB_STATE_ADDRESS)
-		return -EINVAL;
-
-	if (ctrl_req->wLength != 6) {
-		dev_err(priv_dev->dev, "Set SEL should be 6 bytes, got %d\n",
-			ctrl_req->wLength);
-		return -EINVAL;
-	}
-
-	cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma, 6, 1, 0);
-	return 0;
-}
-
-/**
- * cdns3_req_ep0_set_isoch_delay -
- * Handling of GET_ISOCH_DELAY standard USB request
- * @priv_dev: extended gadget object
- * @ctrl_req: pointer to received setup packet
- *
- * Returns 0 if success, error code on error
- */
-static int cdns3_req_ep0_set_isoch_delay(struct cdns3_device *priv_dev,
-					 struct usb_ctrlrequest *ctrl_req)
-{
-	if (ctrl_req->wIndex || ctrl_req->wLength)
-		return -EINVAL;
-
-	priv_dev->isoch_delay = ctrl_req->wValue;
-
-	return 0;
-}
-
-/**
- * cdns3_ep0_standard_request - Handling standard USB requests
- * @priv_dev: extended gadget object
- * @ctrl_req: pointer to received setup packet
- *
- * Returns 0 if success, error code on error
- */
-static int cdns3_ep0_standard_request(struct cdns3_device *priv_dev,
-				      struct usb_ctrlrequest *ctrl_req)
-{
-	int ret;
-
-	switch (ctrl_req->bRequest) {
-	case USB_REQ_SET_ADDRESS:
-		ret = cdns3_req_ep0_set_address(priv_dev, ctrl_req);
-		break;
-	case USB_REQ_SET_CONFIGURATION:
-		ret = cdns3_req_ep0_set_configuration(priv_dev, ctrl_req);
-		break;
-	case USB_REQ_GET_STATUS:
-		ret = cdns3_req_ep0_get_status(priv_dev, ctrl_req);
-		break;
-	case USB_REQ_CLEAR_FEATURE:
-		ret = cdns3_req_ep0_handle_feature(priv_dev, ctrl_req, 0);
-		break;
-	case USB_REQ_SET_FEATURE:
-		ret = cdns3_req_ep0_handle_feature(priv_dev, ctrl_req, 1);
-		break;
-	case USB_REQ_SET_SEL:
-		ret = cdns3_req_ep0_set_sel(priv_dev, ctrl_req);
-		break;
-	case USB_REQ_SET_ISOCH_DELAY:
-		ret = cdns3_req_ep0_set_isoch_delay(priv_dev, ctrl_req);
-		break;
-	default:
-		ret = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
-		break;
-	}
-
-	return ret;
-}
-
-static void __pending_setup_status_handler(struct cdns3_device *priv_dev)
-{
-	struct usb_request *request = priv_dev->pending_status_request;
-
-	if (priv_dev->status_completion_no_call && request &&
-	    request->complete) {
-		request->complete(&priv_dev->eps[0]->endpoint, request);
-		priv_dev->status_completion_no_call = 0;
-	}
-}
-
-void cdns3_pending_setup_status_handler(struct work_struct *work)
-{
-	struct cdns3_device *priv_dev = container_of(work, struct cdns3_device,
-			pending_status_wq);
-	unsigned long flags;
-
-	spin_lock_irqsave(&priv_dev->lock, flags);
-	__pending_setup_status_handler(priv_dev);
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-}
-
-/**
- * cdns3_ep0_setup_phase - Handling setup USB requests
- * @priv_dev: extended gadget object
- */
-static void cdns3_ep0_setup_phase(struct cdns3_device *priv_dev)
-{
-	struct usb_ctrlrequest *ctrl = priv_dev->setup_buf;
-	struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
-	int result;
-
-	priv_dev->ep0_data_dir = ctrl->bRequestType & USB_DIR_IN;
-
-	trace_cdns3_ctrl_req(ctrl);
-
-	if (!list_empty(&priv_ep->pending_req_list)) {
-		struct usb_request *request;
-
-		request = cdns3_next_request(&priv_ep->pending_req_list);
-		priv_ep->dir = priv_dev->ep0_data_dir;
-		cdns3_gadget_giveback(priv_ep, to_cdns3_request(request),
-				      -ECONNRESET);
-	}
-
-	if (le16_to_cpu(ctrl->wLength))
-		priv_dev->ep0_stage = CDNS3_DATA_STAGE;
-	else
-		priv_dev->ep0_stage = CDNS3_STATUS_STAGE;
-
-	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
-		result = cdns3_ep0_standard_request(priv_dev, ctrl);
-	else
-		result = cdns3_ep0_delegate_req(priv_dev, ctrl);
-
-	if (result == USB_GADGET_DELAYED_STATUS)
-		return;
-
-	if (result < 0)
-		cdns3_ep0_complete_setup(priv_dev, 1, 1);
-	else if (priv_dev->ep0_stage == CDNS3_STATUS_STAGE)
-		cdns3_ep0_complete_setup(priv_dev, 0, 1);
-}
-
-static void cdns3_transfer_completed(struct cdns3_device *priv_dev)
-{
-	struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
-
-	if (!list_empty(&priv_ep->pending_req_list)) {
-		struct usb_request *request;
-
-		trace_cdns3_complete_trb(priv_ep, priv_ep->trb_pool);
-		request = cdns3_next_request(&priv_ep->pending_req_list);
-
-		request->actual =
-			TRB_LEN(le32_to_cpu(priv_ep->trb_pool->length));
-
-		priv_ep->dir = priv_dev->ep0_data_dir;
-		cdns3_gadget_giveback(priv_ep, to_cdns3_request(request), 0);
-	}
-
-	cdns3_ep0_complete_setup(priv_dev, 0, 0);
-}
-
-/**
- * cdns3_check_new_setup - Check if controller receive new SETUP packet.
- * @priv_dev: extended gadget object
- *
- * The SETUP packet can be kept in on-chip memory or in system memory.
- */
-static bool cdns3_check_new_setup(struct cdns3_device *priv_dev)
-{
-	u32 ep_sts_reg;
-
-	cdns3_select_ep(priv_dev, 0 | USB_DIR_OUT);
-	ep_sts_reg = readl(&priv_dev->regs->ep_sts);
-
-	return !!(ep_sts_reg & (EP_STS_SETUP | EP_STS_STPWAIT));
-}
-
-/**
- * cdns3_check_ep0_interrupt_proceed - Processes interrupt related to endpoint 0
- * @priv_dev: extended gadget object
- * @dir: USB_DIR_IN for IN direction, USB_DIR_OUT for OUT direction
- */
-void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir)
-{
-	u32 ep_sts_reg;
-
-	cdns3_select_ep(priv_dev, dir);
-
-	ep_sts_reg = readl(&priv_dev->regs->ep_sts);
-	writel(ep_sts_reg, &priv_dev->regs->ep_sts);
-
-	trace_cdns3_ep0_irq(priv_dev, ep_sts_reg);
-
-	__pending_setup_status_handler(priv_dev);
-
-	if (ep_sts_reg & EP_STS_SETUP)
-		priv_dev->wait_for_setup = 1;
-
-	if (priv_dev->wait_for_setup && ep_sts_reg & EP_STS_IOC) {
-		priv_dev->wait_for_setup = 0;
-		cdns3_allow_enable_l1(priv_dev, 0);
-		cdns3_ep0_setup_phase(priv_dev);
-	} else if ((ep_sts_reg & EP_STS_IOC) || (ep_sts_reg & EP_STS_ISP)) {
-		priv_dev->ep0_data_dir = dir;
-		cdns3_transfer_completed(priv_dev);
-	}
-
-	if (ep_sts_reg & EP_STS_DESCMIS) {
-		if (dir == 0 && !priv_dev->setup_pending)
-			cdns3_prepare_setup_packet(priv_dev);
-	}
-}
-
-/**
- * cdns3_gadget_ep0_enable
- * Function shouldn't be called by gadget driver,
- * endpoint 0 is allways active
- */
-static int cdns3_gadget_ep0_enable(struct usb_ep *ep,
-				   const struct usb_endpoint_descriptor *desc)
-{
-	return -EINVAL;
-}
-
-/**
- * cdns3_gadget_ep0_disable
- * Function shouldn't be called by gadget driver,
- * endpoint 0 is allways active
- */
-static int cdns3_gadget_ep0_disable(struct usb_ep *ep)
-{
-	return -EINVAL;
-}
-
-/**
- * cdns3_gadget_ep0_set_halt
- * @ep: pointer to endpoint zero object
- * @value: 1 for set stall, 0 for clear stall
- *
- * Returns 0
- */
-static int cdns3_gadget_ep0_set_halt(struct usb_ep *ep, int value)
-{
-	/* TODO */
-	return 0;
-}
-
-/**
- * cdns3_gadget_ep0_queue Transfer data on endpoint zero
- * @ep: pointer to endpoint zero object
- * @request: pointer to request object
- * @gfp_flags: gfp flags
- *
- * Returns 0 on success, error code elsewhere
- */
-static int cdns3_gadget_ep0_queue(struct usb_ep *ep,
-				  struct usb_request *request,
-				  gfp_t gfp_flags)
-{
-	struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-	unsigned long flags;
-	int erdy_sent = 0;
-	int ret = 0;
-	u8 zlp = 0;
-
-	cdns3_dbg(priv_ep->cdns3_dev, "Queue to Ep0%s L: %d\n",
-		  priv_dev->ep0_data_dir ? "IN" : "OUT",
-		  request->length);
-
-	/* cancel the request if controller receive new SETUP packet. */
-	if (cdns3_check_new_setup(priv_dev))
-		return -ECONNRESET;
-
-	/* send STATUS stage. Should be called only for SET_CONFIGURATION */
-	if (priv_dev->ep0_stage == CDNS3_STATUS_STAGE) {
-		spin_lock_irqsave(&priv_dev->lock, flags);
-		cdns3_select_ep(priv_dev, 0x00);
-
-		erdy_sent = !priv_dev->hw_configured_flag;
-		cdns3_set_hw_configuration(priv_dev);
-
-		if (!erdy_sent)
-			cdns3_ep0_complete_setup(priv_dev, 0, 1);
-
-		cdns3_allow_enable_l1(priv_dev, 1);
-
-		request->actual = 0;
-		priv_dev->status_completion_no_call = true;
-		priv_dev->pending_status_request = request;
-		spin_unlock_irqrestore(&priv_dev->lock, flags);
-
-		/*
-		 * Since there is no completion interrupt for status stage,
-		 * it needs to call ->completion in software after
-		 * ep0_queue is back.
-		 */
-		queue_work(system_freezable_wq, &priv_dev->pending_status_wq);
-		return 0;
-	}
-
-	spin_lock_irqsave(&priv_dev->lock, flags);
-	if (!list_empty(&priv_ep->pending_req_list)) {
-		dev_err(priv_dev->dev,
-			"can't handle multiple requests for ep0\n");
-		spin_unlock_irqrestore(&priv_dev->lock, flags);
-		return -EBUSY;
-	}
-
-	ret = usb_gadget_map_request_by_dev(priv_dev->sysdev, request,
-					    priv_dev->ep0_data_dir);
-	if (ret) {
-		spin_unlock_irqrestore(&priv_dev->lock, flags);
-		dev_err(priv_dev->dev, "failed to map request\n");
-		return -EINVAL;
-	}
-
-	request->status = -EINPROGRESS;
-	list_add_tail(&request->list, &priv_ep->pending_req_list);
-
-	if (request->zero && request->length &&
-	    (request->length % ep->maxpacket == 0))
-		zlp = 1;
-
-	cdns3_ep0_run_transfer(priv_dev, request->dma, request->length, 1, zlp);
-
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-
-	return ret;
-}
-
-/**
- * cdns3_gadget_ep_set_wedge Set wedge on selected endpoint
- * @ep: endpoint object
- *
- * Returns 0
- */
-int cdns3_gadget_ep_set_wedge(struct usb_ep *ep)
-{
-	struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-
-	dev_dbg(priv_dev->dev, "Wedge for %s\n", ep->name);
-	cdns3_gadget_ep_set_halt(ep, 1);
-	priv_ep->flags |= EP_WEDGE;
-
-	return 0;
-}
-
-const struct usb_ep_ops cdns3_gadget_ep0_ops = {
-	.enable = cdns3_gadget_ep0_enable,
-	.disable = cdns3_gadget_ep0_disable,
-	.alloc_request = cdns3_gadget_ep_alloc_request,
-	.free_request = cdns3_gadget_ep_free_request,
-	.queue = cdns3_gadget_ep0_queue,
-	.dequeue = cdns3_gadget_ep_dequeue,
-	.set_halt = cdns3_gadget_ep0_set_halt,
-	.set_wedge = cdns3_gadget_ep_set_wedge,
-};
-
-/**
- * cdns3_ep0_config - Configures default endpoint
- * @priv_dev: extended gadget object
- *
- * Functions sets parameters: maximal packet size and enables interrupts
- */
-void cdns3_ep0_config(struct cdns3_device *priv_dev)
-{
-	struct cdns3_usb_regs __iomem *regs;
-	struct cdns3_endpoint *priv_ep;
-	u32 max_packet_size = 64;
-
-	regs = priv_dev->regs;
-
-	if (priv_dev->gadget.speed == USB_SPEED_SUPER)
-		max_packet_size = 512;
-
-	priv_ep = priv_dev->eps[0];
-
-	if (!list_empty(&priv_ep->pending_req_list)) {
-		struct usb_request *request;
-
-		request = cdns3_next_request(&priv_ep->pending_req_list);
-		list_del_init(&request->list);
-	}
-
-	priv_dev->u1_allowed = 0;
-	priv_dev->u2_allowed = 0;
-
-	priv_dev->gadget.ep0->maxpacket = max_packet_size;
-	cdns3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(max_packet_size);
-
-	/* init ep out */
-	cdns3_select_ep(priv_dev, USB_DIR_OUT);
-
-	if (priv_dev->dev_ver >= DEV_VER_V3) {
-		cdns3_set_register_bit(&priv_dev->regs->dtrans,
-				       BIT(0) | BIT(16));
-		cdns3_set_register_bit(&priv_dev->regs->tdl_from_trb,
-				       BIT(0) | BIT(16));
-	}
-
-	writel(EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size),
-	       &regs->ep_cfg);
-
-	writel(EP_STS_EN_SETUPEN | EP_STS_EN_DESCMISEN | EP_STS_EN_TRBERREN,
-	       &regs->ep_sts_en);
-
-	/* init ep in */
-	cdns3_select_ep(priv_dev, USB_DIR_IN);
-
-	writel(EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size),
-	       &regs->ep_cfg);
-
-	writel(EP_STS_EN_SETUPEN | EP_STS_EN_TRBERREN, &regs->ep_sts_en);
-
-	cdns3_set_register_bit(&regs->usb_conf, USB_CONF_U1DS | USB_CONF_U2DS);
-}
-
-/**
- * cdns3_init_ep0 Initializes software endpoint 0 of gadget
- * @priv_dev: extended gadget object
- * @ep_priv: extended endpoint object
- *
- * Returns 0 on success else error code.
- */
-int cdns3_init_ep0(struct cdns3_device *priv_dev,
-		   struct cdns3_endpoint *priv_ep)
-{
-	sprintf(priv_ep->name, "ep0");
-
-	/* fill linux fields */
-	priv_ep->endpoint.ops = &cdns3_gadget_ep0_ops;
-	priv_ep->endpoint.maxburst = 1;
-	usb_ep_set_maxpacket_limit(&priv_ep->endpoint,
-				   CDNS3_EP0_MAX_PACKET_LIMIT);
-	priv_ep->endpoint.address = 0;
-	priv_ep->endpoint.caps.type_control = 1;
-	priv_ep->endpoint.caps.dir_in = 1;
-	priv_ep->endpoint.caps.dir_out = 1;
-	priv_ep->endpoint.name = priv_ep->name;
-	priv_ep->endpoint.desc = &cdns3_gadget_ep0_desc;
-	priv_dev->gadget.ep0 = &priv_ep->endpoint;
-	priv_ep->type = USB_ENDPOINT_XFER_CONTROL;
-
-	return cdns3_allocate_trb_pool(priv_ep);
-}

drivers/usb/cdns3/gadget-export.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Cadence USBSS DRD Driver - Gadget Export APIs.
- *
- * Copyright (C) 2017 NXP
- * Copyright (C) 2017-2018 NXP
- *
- * Authors: Peter Chen <[e-mail]>
- */
-#ifndef __LINUX_CDNS3_GADGET_EXPORT
-#define __LINUX_CDNS3_GADGET_EXPORT
-
-#ifdef CONFIG_USB_CDNS3_GADGET
-
-int cdns3_gadget_init(struct cdns3 *cdns);
-void cdns3_gadget_exit(struct cdns3 *cdns);
-#else
-
-static inline int cdns3_gadget_init(struct cdns3 *cdns)
-{
-	return -ENXIO;
-}
-
-static inline void cdns3_gadget_exit(struct cdns3 *cdns) { }
-
-#endif
-
-#endif /* __LINUX_CDNS3_GADGET_EXPORT */

drivers/usb/cdns3/gadget.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Cadence USBSS DRD Driver - gadget side.
- *
- * Copyright (C) 2018-2019 Cadence Design Systems.
- * Copyright (C) 2017-2018 NXP
- *
- * Authors: Pawel Jez <[e-mail]>,
- *          Pawel Laszczak <[e-mail]>
- *          Peter Chen <[e-mail]>
- */
-
-/*
- * Work around 1:
- * At some situations, the controller may get stale data address in TRB
- * at below sequences:
- * 1. Controller read TRB includes data address
- * 2. Software updates TRBs includes data address and Cycle bit
- * 3. Controller read TRB which includes Cycle bit
- * 4. DMA run with stale data address
- *
- * To fix this problem, driver needs to make the first TRB in TD as invalid.
- * After preparing all TRBs driver needs to check the position of DMA and
- * if the DMA point to the first just added TRB and doorbell is 1,
- * then driver must defer making this TRB as valid. This TRB will be make
- * as valid during adding next TRB only if DMA is stopped or at TRBERR
- * interrupt.
- *
- * Issue has been fixed in DEV_VER_V3 version of controller.
- *
- */
-
-#include <linux/dma-mapping.h>
-#include <linux/usb/gadget.h>
-#include <linux/module.h>
-
-#include "core.h"
-#include "gadget-export.h"
-#include "gadget.h"
-#include "trace.h"
-#include "drd.h"
-
-static int __cdns3_gadget_ep_queue(struct usb_ep *ep,
-				   struct usb_request *request,
-				   gfp_t gfp_flags);
-
-/**
- * cdns3_set_register_bit - set bit in given register.
- * @ptr: address of device controller register to be read and changed
- * @mask: bits requested to set
- */
-void cdns3_set_register_bit(void __iomem *ptr, u32 mask)
-{
-	mask = readl(ptr) | mask;
-	writel(mask, ptr);
-}
-
-/**
- * cdns3_ep_addr_to_index - Macro converts endpoint address to
- * index of endpoint object in cdns3_device.eps[] container
- * @ep_addr: endpoint address for which endpoint object is required
- *
- */
-u8 cdns3_ep_addr_to_index(u8 ep_addr)
-{
-	return (((ep_addr & 0x7F)) + ((ep_addr & USB_DIR_IN) ? 16 : 0));
-}
-
-static int cdns3_get_dma_pos(struct cdns3_device *priv_dev,
-			     struct cdns3_endpoint *priv_ep)
-{
-	int dma_index;
-
-	dma_index = readl(&priv_dev->regs->ep_traddr) - priv_ep->trb_pool_dma;
-
-	return dma_index / TRB_SIZE;
-}
-
-/**
- * cdns3_next_request - returns next request from list
- * @list: list containing requests
- *
- * Returns request or NULL if no requests in list
- */
-struct usb_request *cdns3_next_request(struct list_head *list)
-{
-	return list_first_entry_or_null(list, struct usb_request, list);
-}
-
-/**
- * cdns3_next_align_buf - returns next buffer from list
- * @list: list containing buffers
- *
- * Returns buffer or NULL if no buffers in list
- */
-struct cdns3_aligned_buf *cdns3_next_align_buf(struct list_head *list)
-{
-	return list_first_entry_or_null(list, struct cdns3_aligned_buf, list);
-}
-
-/**
- * select_ep - selects endpoint
- * @priv_dev:  extended gadget object
- * @ep: endpoint address
- */
-void cdns3_select_ep(struct cdns3_device *priv_dev, u32 ep)
-{
-	if (priv_dev->selected_ep == ep)
-		return;
-
-	priv_dev->selected_ep = ep;
-	writel(ep, &priv_dev->regs->ep_sel);
-}
-
-dma_addr_t cdns3_trb_virt_to_dma(struct cdns3_endpoint *priv_ep,
-				 struct cdns3_trb *trb)
-{
-	u32 offset = (char *)trb - (char *)priv_ep->trb_pool;
-
-	return priv_ep->trb_pool_dma + offset;
-}
-
-int cdns3_ring_size(struct cdns3_endpoint *priv_ep)
-{
-	switch (priv_ep->type) {
-	case USB_ENDPOINT_XFER_ISOC:
-		return TRB_ISO_RING_SIZE;
-	case USB_ENDPOINT_XFER_CONTROL:
-		return TRB_CTRL_RING_SIZE;
-	default:
-		return TRB_RING_SIZE;
-	}
-}
-
-/**
- * cdns3_allocate_trb_pool - Allocates TRB's pool for selected endpoint
- * @priv_ep:  endpoint object
- *
- * Function will return 0 on success or -ENOMEM on allocation error
- */
-int cdns3_allocate_trb_pool(struct cdns3_endpoint *priv_ep)
-{
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-	int ring_size = cdns3_ring_size(priv_ep);
-	struct cdns3_trb *link_trb;
-
-	if (!priv_ep->trb_pool) {
-		priv_ep->trb_pool = dma_alloc_coherent(priv_dev->sysdev,
-						       ring_size,
-						       &priv_ep->trb_pool_dma,
-						       GFP_DMA32 | GFP_ATOMIC);
-		if (!priv_ep->trb_pool)
-			return -ENOMEM;
-	} else {
-		memset(priv_ep->trb_pool, 0, ring_size);
-	}
-
-	if (!priv_ep->num)
-		return 0;
-
-	priv_ep->num_trbs = ring_size / TRB_SIZE;
-	/* Initialize the last TRB as Link TRB */
-	link_trb = (priv_ep->trb_pool + (priv_ep->num_trbs - 1));
-	link_trb->buffer = TRB_BUFFER(priv_ep->trb_pool_dma);
-	link_trb->control = TRB_CYCLE | TRB_TYPE(TRB_LINK) | TRB_TOGGLE;
-
-	return 0;
-}
-
-static void cdns3_free_trb_pool(struct cdns3_endpoint *priv_ep)
-{
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-
-	if (priv_ep->trb_pool) {
-		dma_free_coherent(priv_dev->sysdev,
-				  cdns3_ring_size(priv_ep),
-				  priv_ep->trb_pool, priv_ep->trb_pool_dma);
-		priv_ep->trb_pool = NULL;
-	}
-}
-
-/**
- * cdns3_ep_stall_flush - Stalls and flushes selected endpoint
- * @priv_ep: endpoint object
- *
- * Endpoint must be selected before call to this function
- */
-static void cdns3_ep_stall_flush(struct cdns3_endpoint *priv_ep)
-{
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-
-	cdns3_dbg(priv_ep->cdns3_dev, "Stall & flush endpoint %s\n",
-		  priv_ep->name);
-
-	writel(EP_CMD_DFLUSH | EP_CMD_ERDY | EP_CMD_SSTALL,
-	       &priv_dev->regs->ep_cmd);
-
-	/* wait for DFLUSH cleared */
-	cdns3_handshake(&priv_dev->regs->ep_cmd, EP_CMD_DFLUSH, 0, 1000);
-	priv_ep->flags |= EP_STALL;
-}
-
-/**
- * cdns3_hw_reset_eps_config - reset endpoints configuration kept by controller.
- * @priv_dev: extended gadget object
- */
-void cdns3_hw_reset_eps_config(struct cdns3_device *priv_dev)
-{
-	writel(USB_CONF_CFGRST, &priv_dev->regs->usb_conf);
-
-	cdns3_allow_enable_l1(priv_dev, 0);
-	priv_dev->hw_configured_flag = 0;
-	priv_dev->onchip_used_size = 0;
-	priv_dev->out_mem_is_allocated = 0;
-	priv_dev->wait_for_setup = 0;
-}
-
-/**
- * cdns3_ep_inc_trb - increment a trb index.
- * @index: Pointer to the TRB index to increment.
- * @cs: Cycle state
- * @trb_in_seg: number of TRBs in segment
- *
- * The index should never point to the link TRB. After incrementing,
- * if it is point to the link TRB, wrap around to the beginning and revert
- * cycle state bit The
- * link TRB is always at the last TRB entry.
- */
-static void cdns3_ep_inc_trb(int *index, u8 *cs, int trb_in_seg)
-{
-	(*index)++;
-	if (*index == (trb_in_seg - 1)) {
-		*index = 0;
-		*cs ^=  1;
-	}
-}
-
-/**
- * cdns3_ep_inc_enq - increment endpoint's enqueue pointer
- * @priv_ep: The endpoint whose enqueue pointer we're incrementing
- */
-static void cdns3_ep_inc_enq(struct cdns3_endpoint *priv_ep)
-{
-	priv_ep->free_trbs--;
-	cdns3_ep_inc_trb(&priv_ep->enqueue, &priv_ep->pcs, priv_ep->num_trbs);
-}
-
-/**
- * cdns3_ep_inc_deq - increment endpoint's dequeue pointer
- * @priv_ep: The endpoint whose dequeue pointer we're incrementing
- */
-static void cdns3_ep_inc_deq(struct cdns3_endpoint *priv_ep)
-{
-	priv_ep->free_trbs++;
-	cdns3_ep_inc_trb(&priv_ep->dequeue, &priv_ep->ccs, priv_ep->num_trbs);
-}
-
-void cdns3_move_deq_to_next_trb(struct cdns3_request *priv_req)
-{
-	struct cdns3_endpoint *priv_ep = priv_req->priv_ep;
-	int current_trb = priv_req->start_trb;
-
-	while (current_trb != priv_req->end_trb) {
-		cdns3_ep_inc_deq(priv_ep);
-		current_trb = priv_ep->dequeue;
-	}
-
-	cdns3_ep_inc_deq(priv_ep);
-}
-
-/**
- * cdns3_allow_enable_l1 - enable/disable permits to transition to L1.
- * @priv_dev: Extended gadget object
- * @enable: Enable/disable permit to transition to L1.
- *
- * If bit USB_CONF_L1EN is set and device receive Extended Token packet,
- * then controller answer with ACK handshake.
- * If bit USB_CONF_L1DS is set and device receive Extended Token packet,
- * then controller answer with NYET handshake.
- */
-void cdns3_allow_enable_l1(struct cdns3_device *priv_dev, int enable)
-{
-	if (enable)
-		writel(USB_CONF_L1EN, &priv_dev->regs->usb_conf);
-	else
-		writel(USB_CONF_L1DS, &priv_dev->regs->usb_conf);
-}
-
-enum usb_device_speed cdns3_get_speed(struct cdns3_device *priv_dev)
-{
-	u32 reg;
-
-	reg = readl(&priv_dev->regs->usb_sts);
-
-	if (DEV_SUPERSPEED(reg))
-		return USB_SPEED_SUPER;
-	else if (DEV_HIGHSPEED(reg))
-		return USB_SPEED_HIGH;
-	else if (DEV_FULLSPEED(reg))
-		return USB_SPEED_FULL;
-	else if (DEV_LOWSPEED(reg))
-		return USB_SPEED_LOW;
-	return USB_SPEED_UNKNOWN;
-}
-
-/**
- * cdns3_start_all_request - add to ring all request not started
- * @priv_dev: Extended gadget object
- * @priv_ep: The endpoint for whom request will be started.
- *
- * Returns return ENOMEM if transfer ring i not enough TRBs to start
- *         all requests.
- */
-static int cdns3_start_all_request(struct cdns3_device *priv_dev,
-				   struct cdns3_endpoint *priv_ep)
-{
-	struct cdns3_request *priv_req;
-	struct usb_request *request;
-	int ret = 0;
-
-	while (!list_empty(&priv_ep->deferred_req_list)) {
-		request = cdns3_next_request(&priv_ep->deferred_req_list);
-		priv_req = to_cdns3_request(request);
-
-		ret = cdns3_ep_run_transfer(priv_ep, request);
-		if (ret)
-			return ret;
-
-		list_del(&request->list);
-		list_add_tail(&request->list,
-			      &priv_ep->pending_req_list);
-	}
-
-	priv_ep->flags &= ~EP_RING_FULL;
-	return ret;
-}
-
-/**
- * cdns3_gadget_giveback - call struct usb_request's ->complete callback
- * @priv_ep: The endpoint to whom the request belongs to
- * @priv_req: The request we're giving back
- * @status: completion code for the request
- *
- * Must be called with controller's lock held and interrupts disabled. This
- * function will unmap @req and call its ->complete() callback to notify upper
- * layers that it has completed.
- */
-void cdns3_gadget_giveback(struct cdns3_endpoint *priv_ep,
-			   struct cdns3_request *priv_req,
-			   int status)
-{
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-	struct usb_request *request = &priv_req->request;
-
-	list_del_init(&request->list);
-
-	if (request->status == -EINPROGRESS)
-		request->status = status;
-
-	usb_gadget_unmap_request_by_dev(priv_dev->sysdev, request,
-					priv_ep->dir);
-
-	if ((priv_req->flags & REQUEST_UNALIGNED) &&
-	    priv_ep->dir == USB_DIR_OUT && !request->status)
-		memcpy(request->buf, priv_req->aligned_buf->buf,
-		       request->length);
-
-	priv_req->flags &= ~(REQUEST_PENDING | REQUEST_UNALIGNED);
-	trace_cdns3_gadget_giveback(priv_req);
-
-	if (request->complete) {
-		spin_unlock(&priv_dev->lock);
-		usb_gadget_giveback_request(&priv_ep->endpoint,
-					    request);
-		spin_lock(&priv_dev->lock);
-	}
-
-	if (request->buf == priv_dev->zlp_buf)
-		cdns3_gadget_ep_free_request(&priv_ep->endpoint, request);
-}
-
-void cdns3_wa1_restore_cycle_bit(struct cdns3_endpoint *priv_ep)
-{
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-
-	/* Work around for stale data address in TRB*/
-	if (priv_ep->wa1_set) {
-		cdns3_dbg(priv_dev, "WA1: update cycle bit\n");
-		priv_ep->wa1_set = 0;
-		priv_ep->wa1_trb_index = 0xFFFF;
-		if (priv_ep->wa1_cycle_bit) {
-			priv_ep->wa1_trb->control =
-				priv_ep->wa1_trb->control | 0x1;
-		} else {
-			priv_ep->wa1_trb->control =
-				priv_ep->wa1_trb->control & ~0x1;
-		}
-	}
-}
-
-static int cdns3_prepare_aligned_request_buf(struct cdns3_request *priv_req)
-{
-	struct cdns3_endpoint *priv_ep = priv_req->priv_ep;
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-	struct cdns3_aligned_buf *buf;
-
-	/* check if buffer is aligned to 8. */
-	if (!((uintptr_t)priv_req->request.buf & 0x7))
-		return 0;
-
-	buf = priv_req->aligned_buf;
-
-	if (!buf || priv_req->request.length > buf->size) {
-		buf = kzalloc(sizeof(*buf), GFP_ATOMIC);
-		if (!buf)
-			return -ENOMEM;
-
-		buf->size = priv_req->request.length;
-
-		buf->buf = dma_alloc_coherent(priv_dev->sysdev,
-					      buf->size,
-					      &buf->dma,
-					      GFP_ATOMIC);
-		if (!buf->buf) {
-			kfree(buf);
-			return -ENOMEM;
-		}
-
-		if (priv_req->aligned_buf) {
-			trace_cdns3_free_aligned_request(priv_req);
-			priv_req->aligned_buf->in_use = 0;
-			priv_dev->run_garbage_colector = 1;
-		}
-
-		buf->in_use = 1;
-		priv_req->aligned_buf = buf;
-
-		list_add_tail(&buf->list,
-			      &priv_dev->aligned_buf_list);
-	}
-
-	if (priv_ep->dir == USB_DIR_IN) {
-		memcpy(buf->buf, priv_req->request.buf,
-		       priv_req->request.length);
-	}
-
-	priv_req->flags |= REQUEST_UNALIGNED;
-	trace_cdns3_prepare_aligned_request(priv_req);
-
-	return 0;
-}
-
-static int cdns3_wa1_update_guard(struct cdns3_endpoint *priv_ep,
-				  struct cdns3_trb *trb)
-{
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-
-	if (!priv_ep->wa1_set) {
-		u32 doorbell;
-
-		doorbell = !!(readl(&priv_dev->regs->ep_cmd) & EP_CMD_DRDY);
-
-		if (doorbell) {
-			priv_ep->wa1_cycle_bit = priv_ep->pcs ? TRB_CYCLE : 0;
-			priv_ep->wa1_set = 1;
-			priv_ep->wa1_trb = trb;
-			priv_ep->wa1_trb_index = priv_ep->enqueue;
-			cdns3_dbg(priv_dev, "WA1 set guard\n");
-			return 0;
-		}
-	}
-	return 1;
-}
-
-static void cdns3_wa1_tray_restore_cycle_bit(struct cdns3_device *priv_dev,
-					     struct cdns3_endpoint *priv_ep)
-{
-	int dma_index;
-	u32 doorbell;
-
-	doorbell = !!(readl(&priv_dev->regs->ep_cmd) & EP_CMD_DRDY);
-	dma_index = cdns3_get_dma_pos(priv_dev, priv_ep);
-
-	if (!doorbell || dma_index != priv_ep->wa1_trb_index)
-		cdns3_wa1_restore_cycle_bit(priv_ep);
-}
-
-/**
- * cdns3_ep_run_transfer - start transfer on no-default endpoint hardware
- * @priv_ep: endpoint object
- *
- * Returns zero on success or negative value on failure
- */
-int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
-			  struct usb_request *request)
-{
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-	struct cdns3_request *priv_req;
-	struct cdns3_trb *trb;
-	dma_addr_t trb_dma;
-	u32 togle_pcs = 1;
-	int sg_iter = 0;
-	int num_trb;
-	int address;
-	u32 control;
-	int pcs;
-
-	if (priv_ep->type == USB_ENDPOINT_XFER_ISOC)
-		num_trb = priv_ep->interval;
-	else
-		num_trb = request->num_sgs ? request->num_sgs : 1;
-
-	if (num_trb > priv_ep->free_trbs) {
-		priv_ep->flags |= EP_RING_FULL;
-		return -ENOBUFS;
-	}
-
-	priv_req = to_cdns3_request(request);
-	address = priv_ep->endpoint.desc->bEndpointAddress;
-
-	priv_ep->flags |= EP_PENDING_REQUEST;
-
-	/* must allocate buffer aligned to 8 */
-	if (priv_req->flags & REQUEST_UNALIGNED)
-		trb_dma = priv_req->aligned_buf->dma;
-	else
-		trb_dma = request->dma;
-
-	trb = priv_ep->trb_pool + priv_ep->enqueue;
-	priv_req->start_trb = priv_ep->enqueue;
-	priv_req->trb = trb;
-
-	cdns3_select_ep(priv_ep->cdns3_dev, address);
-
-	/* prepare ring */
-	if ((priv_ep->enqueue + num_trb)  >= (priv_ep->num_trbs - 1)) {
-		struct cdns3_trb *link_trb;
-		int doorbell, dma_index;
-		u32 ch_bit = 0;
-
-		doorbell = !!(readl(&priv_dev->regs->ep_cmd) & EP_CMD_DRDY);
-		dma_index = cdns3_get_dma_pos(priv_dev, priv_ep);
-
-		/* Driver can't update LINK TRB if it is current processed. */
-		if (doorbell && dma_index == priv_ep->num_trbs - 1) {
-			priv_ep->flags |= EP_DEFERRED_DRDY;
-			return -ENOBUFS;
-		}
-
-		/*updating C bt in  Link TRB before starting DMA*/
-		link_trb = priv_ep->trb_pool + (priv_ep->num_trbs - 1);
-		/*
-		 * For TRs size equal 2 enabling TRB_CHAIN for epXin causes
-		 * that DMA stuck at the LINK TRB.
-		 * On the other hand, removing TRB_CHAIN for longer TRs for
-		 * epXout cause that DMA stuck after handling LINK TRB.
-		 * To eliminate this strange behavioral driver set TRB_CHAIN
-		 * bit only for TR size > 2.
-		 */
-		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC ||
-		    TRBS_PER_SEGMENT > 2)
-			ch_bit = TRB_CHAIN;
-
-		link_trb->control = ((priv_ep->pcs) ? TRB_CYCLE : 0) |
-				    TRB_TYPE(TRB_LINK) | TRB_TOGGLE | ch_bit;
-	}
-
-	if (priv_dev->dev_ver <= DEV_VER_V2)
-		togle_pcs = cdns3_wa1_update_guard(priv_ep, trb);
-
-	/* set incorrect Cycle Bit for first trb*/
-	control = priv_ep->pcs ? 0 : TRB_CYCLE;
-
-	do {
-		u32 length;
-		u16 td_size = 0;
-
-		/* fill TRB */
-		control |= TRB_TYPE(TRB_NORMAL);
-		trb->buffer = TRB_BUFFER(request->num_sgs == 0
-				? trb_dma : request->sg[sg_iter].dma_address);
-
-		if (likely(!request->num_sgs))
-			length = request->length;
-		else
-			length = request->sg[sg_iter].length;
-
-		if (likely(priv_dev->dev_ver >= DEV_VER_V2))
-			td_size = DIV_ROUND_UP(length,
-					       priv_ep->endpoint.maxpacket);
-
-		trb->length = TRB_BURST_LEN(priv_ep->trb_burst_size) |
-					TRB_LEN(length);
-		if (priv_dev->gadget.speed == USB_SPEED_SUPER)
-			trb->length |= TRB_TDL_SS_SIZE(td_size);
-		else
-			control |= TRB_TDL_HS_SIZE(td_size);
-
-		pcs = priv_ep->pcs ? TRB_CYCLE : 0;
-
-		/*
-		 * first trb should be prepared as last to avoid processing
-		 *  transfer to early
-		 */
-		if (sg_iter != 0)
-			control |= pcs;
-
-		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC  && !priv_ep->dir) {
-			control |= TRB_IOC | TRB_ISP;
-		} else {
-			/* for last element in TD or in SG list */
-			if (sg_iter == (num_trb - 1) && sg_iter != 0)
-				control |= pcs | TRB_IOC | TRB_ISP;
-		}
-
-		if (sg_iter)
-			trb->control = control;
-		else
-			priv_req->trb->control = control;
-
-		control = 0;
-		++sg_iter;
-		priv_req->end_trb = priv_ep->enqueue;
-		cdns3_ep_inc_enq(priv_ep);
-		trb = priv_ep->trb_pool + priv_ep->enqueue;
-	} while (sg_iter < num_trb);
-
-	trb = priv_req->trb;
-
-	priv_req->flags |= REQUEST_PENDING;
-
-	if (sg_iter == 1)
-		trb->control |= TRB_IOC | TRB_ISP;
-	/*
-	 * Memory barrier - cycle bit must be set before other filds in trb.
-	 */
-	wmb();
-
-	/* give the TD to the consumer*/
-	if (togle_pcs)
-		trb->control =  trb->control ^ 1;
-
-	if (priv_dev->dev_ver <= DEV_VER_V2)
-		cdns3_wa1_tray_restore_cycle_bit(priv_dev, priv_ep);
-
-	trace_cdns3_prepare_trb(priv_ep, priv_req->trb);
-
-	/*
-	 * Memory barrier - Cycle Bit must be set before trb->length  and
-	 * trb->buffer fields.
-	 */
-	wmb();
-
-	/*
-	 * For DMULT mode we can set address to transfer ring only once after
-	 * enabling endpoint.
-	 */
-	if (priv_ep->flags & EP_UPDATE_EP_TRBADDR) {
-		/*
-		 * Until SW is not ready to handle the OUT transfer the ISO OUT
-		 * Endpoint should be disabled (EP_CFG.ENABLE = 0).
-		 * EP_CFG_ENABLE must be set before updating ep_traddr.
-		 */
-		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC  && !priv_ep->dir &&
-		    !(priv_ep->flags & EP_QUIRK_ISO_OUT_EN)) {
-			priv_ep->flags |= EP_QUIRK_ISO_OUT_EN;
-			cdns3_set_register_bit(&priv_dev->regs->ep_cfg,
-					       EP_CFG_ENABLE);
-		}
-
-		writel(EP_TRADDR_TRADDR(priv_ep->trb_pool_dma +
-					priv_req->start_trb * TRB_SIZE),
-		       &priv_dev->regs->ep_traddr);
-
-		cdns3_dbg(priv_ep->cdns3_dev, "Update ep_trbaddr for %s to %08x\n",
-			  priv_ep->name, readl(&priv_dev->regs->ep_traddr));
-
-		priv_ep->flags &= ~EP_UPDATE_EP_TRBADDR;
-	}
-
-	if (!priv_ep->wa1_set && !(priv_ep->flags & EP_STALL)) {
-		trace_cdns3_ring(priv_ep);
-		/*clearing TRBERR and EP_STS_DESCMIS before seting DRDY*/
-		writel(EP_STS_TRBERR | EP_STS_DESCMIS, &priv_dev->regs->ep_sts);
-		writel(EP_CMD_DRDY, &priv_dev->regs->ep_cmd);
-		trace_cdns3_doorbell_epx(priv_ep->name,
-					 readl(&priv_dev->regs->ep_traddr));
-	}
-
-	/* WORKAROUND for transition to L0 */
-	__cdns3_gadget_wakeup(priv_dev);
-
-	return 0;
-}
-
-void cdns3_set_hw_configuration(struct cdns3_device *priv_dev)
-{
-	struct cdns3_endpoint *priv_ep;
-	struct usb_ep *ep;
-	int result = 0;
-
-	if (priv_dev->hw_configured_flag)
-		return;
-
-	writel(USB_CONF_CFGSET, &priv_dev->regs->usb_conf);
-	writel(EP_CMD_ERDY | EP_CMD_REQ_CMPL, &priv_dev->regs->ep_cmd);
-
-	cdns3_set_register_bit(&priv_dev->regs->usb_conf,
-			       USB_CONF_U1EN | USB_CONF_U2EN);
-
-	/* wait until configuration set */
-	result = cdns3_handshake(&priv_dev->regs->usb_sts,
-				 USB_STS_CFGSTS_MASK, 1, 100);
-
-	priv_dev->hw_configured_flag = 1;
-
-	list_for_each_entry(ep, &priv_dev->gadget.ep_list, ep_list) {
-		if (ep->enabled) {
-			priv_ep = ep_to_cdns3_ep(ep);
-			cdns3_start_all_request(priv_dev, priv_ep);
-		}
-	}
-}
-
-/**
- * cdns3_request_handled - check whether request has been handled by DMA
- *
- * @priv_ep: extended endpoint object.
- * @priv_req: request object for checking
- *
- * Endpoint must be selected before invoking this function.
- *
- * Returns false if request has not been handled by DMA, else returns true.
- *
- * SR - start ring
- * ER -  end ring
- * DQ = priv_ep->dequeue - dequeue position
- * EQ = priv_ep->enqueue -  enqueue position
- * ST = priv_req->start_trb - index of first TRB in transfer ring
- * ET = priv_req->end_trb - index of last TRB in transfer ring
- * CI = current_index - index of processed TRB by DMA.
- *
- * As first step, function checks if cycle bit for priv_req->start_trb is
- * correct.
- *
- * some rules:
- * 1. priv_ep->dequeue never exceed current_index.
- * 2  priv_ep->enqueue never exceed priv_ep->dequeue
- * 3. exception: priv_ep->enqueue == priv_ep->dequeue
- *    and priv_ep->free_trbs is zero.
- *    This case indicate that TR is full.
- *
- * Then We can split recognition into two parts:
- * Case 1 - priv_ep->dequeue < current_index
- *      SR ... EQ ... DQ ... CI ... ER
- *      SR ... DQ ... CI ... EQ ... ER
- *
- *      Request has been handled by DMA if ST and ET is between DQ and CI.
- *
- * Case 2 - priv_ep->dequeue > current_index
- * This situation take place when CI go through the LINK TRB at the end of
- * transfer ring.
- *      SR ... CI ... EQ ... DQ ... ER
- *
- *      Request has been handled by DMA if ET is less then CI or
- *      ET is greater or equal DQ.
- */
-static bool cdns3_request_handled(struct cdns3_endpoint *priv_ep,
-				  struct cdns3_request *priv_req)
-{
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-	struct cdns3_trb *trb = priv_req->trb;
-	int current_index = 0;
-	int handled = 0;
-	int doorbell;
-
-	current_index = cdns3_get_dma_pos(priv_dev, priv_ep);
-	doorbell = !!(readl(&priv_dev->regs->ep_cmd) & EP_CMD_DRDY);
-
-	trb = &priv_ep->trb_pool[priv_req->start_trb];
-
-	if ((trb->control  & TRB_CYCLE) != priv_ep->ccs)
-		goto finish;
-
-	if (doorbell == 1 && current_index == priv_ep->dequeue)
-		goto finish;
-
-	/* The corner case for TRBS_PER_SEGMENT equal 2). */
-	if (TRBS_PER_SEGMENT == 2 && priv_ep->type != USB_ENDPOINT_XFER_ISOC) {
-		handled = 1;
-		goto finish;
-	}
-
-	if (priv_ep->enqueue == priv_ep->dequeue &&
-	    priv_ep->free_trbs == 0) {
-		handled = 1;
-	} else if (priv_ep->dequeue < current_index) {
-		if ((current_index == (priv_ep->num_trbs - 1)) &&
-		    !priv_ep->dequeue)
-			goto finish;
-
-		if (priv_req->end_trb >= priv_ep->dequeue &&
-		    priv_req->end_trb < current_index)
-			handled = 1;
-	} else if (priv_ep->dequeue  > current_index) {
-		if (priv_req->end_trb  < current_index ||
-		    priv_req->end_trb >= priv_ep->dequeue)
-			handled = 1;
-	}
-
-finish:
-	trace_cdns3_request_handled(priv_req, current_index, handled);
-
-	return handled;
-}
-
-static void cdns3_transfer_completed(struct cdns3_device *priv_dev,
-				     struct cdns3_endpoint *priv_ep)
-{
-	struct cdns3_request *priv_req;
-	struct usb_request *request;
-	struct cdns3_trb *trb;
-
-	while (!list_empty(&priv_ep->pending_req_list)) {
-		request = cdns3_next_request(&priv_ep->pending_req_list);
-		priv_req = to_cdns3_request(request);
-
-		/* Re-select endpoint. It could be changed by other CPU during
-		 * handling usb_gadget_giveback_request.
-		 */
-		cdns3_select_ep(priv_dev, priv_ep->endpoint.address);
-
-		if (!cdns3_request_handled(priv_ep, priv_req))
-			goto prepare_next_td;
-
-		trb = priv_ep->trb_pool + priv_ep->dequeue;
-		trace_cdns3_complete_trb(priv_ep, trb);
-
-		if (trb != priv_req->trb)
-			dev_warn(priv_dev->dev,
-				 "request_trb=0x%p, queue_trb=0x%p\n",
-				 priv_req->trb, trb);
-
-		request->actual = TRB_LEN(le32_to_cpu(trb->length));
-		cdns3_move_deq_to_next_trb(priv_req);
-		cdns3_gadget_giveback(priv_ep, priv_req, 0);
-
-		if (priv_ep->type != USB_ENDPOINT_XFER_ISOC &&
-		    TRBS_PER_SEGMENT == 2)
-			break;
-	}
-	priv_ep->flags &= ~EP_PENDING_REQUEST;
-
-prepare_next_td:
-	cdns3_start_all_request(priv_dev, priv_ep);
-}
-
-void cdns3_rearm_transfer(struct cdns3_endpoint *priv_ep, u8 rearm)
-{
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-
-	cdns3_wa1_restore_cycle_bit(priv_ep);
-
-	if (rearm) {
-		trace_cdns3_ring(priv_ep);
-
-		/* Cycle Bit must be updated before arming DMA. */
-		wmb();
-		writel(EP_CMD_DRDY, &priv_dev->regs->ep_cmd);
-
-		__cdns3_gadget_wakeup(priv_dev);
-
-		trace_cdns3_doorbell_epx(priv_ep->name,
-					 readl(&priv_dev->regs->ep_traddr));
-	}
-}
-
-/**
- * cdns3_check_ep_interrupt_proceed - Processes interrupt related to endpoint
- * @priv_ep: endpoint object
- *
- * Returns 0
- */
-static int cdns3_check_ep_interrupt_proceed(struct cdns3_endpoint *priv_ep)
-{
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-	u32 ep_sts_reg;
-
-	cdns3_select_ep(priv_dev, priv_ep->endpoint.address);
-
-	trace_cdns3_epx_irq(priv_dev, priv_ep);
-
-	ep_sts_reg = readl(&priv_dev->regs->ep_sts);
-	writel(ep_sts_reg, &priv_dev->regs->ep_sts);
-
-	if (ep_sts_reg & EP_STS_TRBERR) {
-		/*
-		 * For isochronous transfer driver completes request on
-		 * IOC or on TRBERR. IOC appears only when device receive
-		 * OUT data packet. If host disable stream or lost some packet
-		 * then the only way to finish all queued transfer is to do it
-		 * on TRBERR event.
-		 */
-		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC &&
-		    !priv_ep->wa1_set) {
-			if (!priv_ep->dir) {
-				u32 ep_cfg = readl(&priv_dev->regs->ep_cfg);
-
-				ep_cfg &= ~EP_CFG_ENABLE;
-				writel(ep_cfg, &priv_dev->regs->ep_cfg);
-				priv_ep->flags &= ~EP_QUIRK_ISO_OUT_EN;
-			}
-			cdns3_transfer_completed(priv_dev, priv_ep);
-		} else {
-			if (priv_ep->flags & EP_DEFERRED_DRDY) {
-				priv_ep->flags &= ~EP_DEFERRED_DRDY;
-				cdns3_start_all_request(priv_dev, priv_ep);
-			} else {
-				cdns3_rearm_transfer(priv_ep, priv_ep->wa1_set);
-			}
-		}
-	}
-
-	if ((ep_sts_reg & EP_STS_IOC) || (ep_sts_reg & EP_STS_ISP))
-		cdns3_transfer_completed(priv_dev, priv_ep);
-
-	return 0;
-}
-
-/**
- * cdns3_check_usb_interrupt_proceed - Processes interrupt related to device
- * @priv_dev: extended gadget object
- * @usb_ists: bitmap representation of device's reported interrupts
- * (usb_ists register value)
- */
-static void cdns3_check_usb_interrupt_proceed(struct cdns3_device *priv_dev,
-					      u32 usb_ists)
-{
-	int speed = 0;
-
-	trace_cdns3_usb_irq(priv_dev, usb_ists);
-	if (usb_ists & USB_ISTS_L1ENTI) {
-		/*
-		 * WORKAROUND: CDNS3 controller has issue with hardware resuming
-		 * from L1. To fix it, if any DMA transfer is pending driver
-		 * must starts driving resume signal immediately.
-		 */
-		if (readl(&priv_dev->regs->drbl))
-			__cdns3_gadget_wakeup(priv_dev);
-	}
-
-	/* Connection detected */
-	if (usb_ists & (USB_ISTS_CON2I | USB_ISTS_CONI)) {
-		speed = cdns3_get_speed(priv_dev);
-		priv_dev->gadget.speed = speed;
-		usb_gadget_set_state(&priv_dev->gadget, USB_STATE_POWERED);
-		cdns3_ep0_config(priv_dev);
-	}
-
-	/* Disconnection detected */
-	if (usb_ists & (USB_ISTS_DIS2I | USB_ISTS_DISI)) {
-		if (priv_dev->gadget_driver &&
-		    priv_dev->gadget_driver->disconnect) {
-			spin_unlock(&priv_dev->lock);
-			priv_dev->gadget_driver->disconnect(&priv_dev->gadget);
-			spin_lock(&priv_dev->lock);
-		}
-
-		priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
-		usb_gadget_set_state(&priv_dev->gadget, USB_STATE_NOTATTACHED);
-		cdns3_hw_reset_eps_config(priv_dev);
-	}
-
-	if (usb_ists & (USB_ISTS_L2ENTI | USB_ISTS_U3ENTI)) {
-		if (priv_dev->gadget_driver &&
-		    priv_dev->gadget_driver->suspend) {
-			spin_unlock(&priv_dev->lock);
-			priv_dev->gadget_driver->suspend(&priv_dev->gadget);
-			spin_lock(&priv_dev->lock);
-		}
-	}
-
-	if (usb_ists & (USB_ISTS_L2EXTI | USB_ISTS_U3EXTI)) {
-		if (priv_dev->gadget_driver &&
-		    priv_dev->gadget_driver->resume) {
-			spin_unlock(&priv_dev->lock);
-			priv_dev->gadget_driver->resume(&priv_dev->gadget);
-			spin_lock(&priv_dev->lock);
-		}
-	}
-
-	/* reset*/
-	if (usb_ists & (USB_ISTS_UWRESI | USB_ISTS_UHRESI | USB_ISTS_U2RESI)) {
-		if (priv_dev->gadget_driver) {
-			spin_unlock(&priv_dev->lock);
-			usb_gadget_udc_reset(&priv_dev->gadget,
-					     priv_dev->gadget_driver);
-			spin_lock(&priv_dev->lock);
-
-			/*read again to check the actual speed*/
-			speed = cdns3_get_speed(priv_dev);
-			priv_dev->gadget.speed = speed;
-			cdns3_hw_reset_eps_config(priv_dev);
-			cdns3_ep0_config(priv_dev);
-		}
-	}
-}
-
-/**
- * cdns3_device_irq_handler- interrupt handler for device part of controller
- *
- * @irq: irq number for cdns3 core device
- * @data: structure of cdns3
- *
- * Returns IRQ_HANDLED or IRQ_NONE
- */
-static irqreturn_t cdns3_device_irq_handler(int irq, void *data)
-{
-	struct cdns3_device *priv_dev;
-	struct cdns3 *cdns = data;
-	irqreturn_t ret = IRQ_NONE;
-	unsigned long flags;
-	u32 reg;
-
-	priv_dev = cdns->gadget_dev;
-	spin_lock_irqsave(&priv_dev->lock, flags);
-
-	/* check USB device interrupt */
-	reg = readl(&priv_dev->regs->usb_ists);
-
-	if (reg) {
-		writel(reg, &priv_dev->regs->usb_ists);
-		cdns3_check_usb_interrupt_proceed(priv_dev, reg);
-		ret = IRQ_HANDLED;
-	}
-
-	/* check endpoint interrupt */
-	reg = readl(&priv_dev->regs->ep_ists);
-
-	if (reg) {
-		priv_dev->shadow_ep_en |= reg;
-		reg = ~reg & readl(&priv_dev->regs->ep_ien);
-		/* mask deferred interrupt. */
-		writel(reg, &priv_dev->regs->ep_ien);
-		ret = IRQ_WAKE_THREAD;
-	}
-
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-	return ret;
-}
-
-/**
- * cdns3_device_thread_irq_handler- interrupt handler for device part
- * of controller
- *
- * @irq: irq number for cdns3 core device
- * @data: structure of cdns3
- *
- * Returns IRQ_HANDLED or IRQ_NONE
- */
-static irqreturn_t cdns3_device_thread_irq_handler(int irq, void *data)
-{
-	struct cdns3_device *priv_dev;
-	struct cdns3 *cdns = data;
-	irqreturn_t ret = IRQ_NONE;
-	unsigned long flags;
-	u32 ep_ien;
-	int bit;
-	u32 reg;
-
-	priv_dev = cdns->gadget_dev;
-	spin_lock_irqsave(&priv_dev->lock, flags);
-
-	reg = readl(&priv_dev->regs->ep_ists);
-
-	/* handle default endpoint OUT */
-	if (reg & EP_ISTS_EP_OUT0) {
-		cdns3_check_ep0_interrupt_proceed(priv_dev, USB_DIR_OUT);
-		ret = IRQ_HANDLED;
-	}
-
-	/* handle default endpoint IN */
-	if (reg & EP_ISTS_EP_IN0) {
-		cdns3_check_ep0_interrupt_proceed(priv_dev, USB_DIR_IN);
-		ret = IRQ_HANDLED;
-	}
-
-	/* check if interrupt from non default endpoint, if no exit */
-	reg &= ~(EP_ISTS_EP_OUT0 | EP_ISTS_EP_IN0);
-	if (!reg)
-		goto irqend;
-
-	for_each_set_bit(bit, (unsigned long *)&reg,
-			 sizeof(u32) * BITS_PER_BYTE) {
-		priv_dev->shadow_ep_en |= BIT(bit);
-		cdns3_check_ep_interrupt_proceed(priv_dev->eps[bit]);
-		ret = IRQ_HANDLED;
-	}
-
-	if (priv_dev->run_garbage_colector) {
-		struct cdns3_aligned_buf *buf, *tmp;
-
-		list_for_each_entry_safe(buf, tmp, &priv_dev->aligned_buf_list,
-					 list) {
-			if (!buf->in_use) {
-				list_del(&buf->list);
-
-				spin_unlock_irqrestore(&priv_dev->lock, flags);
-				dma_free_coherent(priv_dev->sysdev, buf->size,
-						  buf->buf,
-						  buf->dma);
-				spin_lock_irqsave(&priv_dev->lock, flags);
-
-				kfree(buf);
-			}
-		}
-
-		priv_dev->run_garbage_colector = 0;
-	}
-
-irqend:
-	ep_ien = readl(&priv_dev->regs->ep_ien) | priv_dev->shadow_ep_en;
-	priv_dev->shadow_ep_en = 0;
-	/* Unmask all handled EP interrupts */
-	writel(ep_ien, &priv_dev->regs->ep_ien);
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-	return ret;
-}
-
-/**
- * cdns3_ep_onchip_buffer_reserve - Try to reserve onchip buf for EP
- *
- * The real reservation will occur during write to EP_CFG register,
- * this function is used to check if the 'size' reservation is allowed.
- *
- * @priv_dev: extended gadget object
- * @size: the size (KB) for EP would like to allocate
- * @is_in: endpoint direction
- *
- * Return 0 if the required size can met or negative value on failure
- */
-static int cdns3_ep_onchip_buffer_reserve(struct cdns3_device *priv_dev,
-					  int size, int is_in)
-{
-	int remained;
-
-	/* 2KB are reserved for EP0*/
-	remained = priv_dev->onchip_buffers - priv_dev->onchip_used_size - 2;
-
-	if (is_in) {
-		if (remained < size)
-			return -EPERM;
-
-		priv_dev->onchip_used_size += size;
-	} else {
-		int required;
-
-		/**
-		 *  ALL OUT EPs are shared the same chunk onchip memory, so
-		 * driver checks if it already has assigned enough buffers
-		 */
-		if (priv_dev->out_mem_is_allocated >= size)
-			return 0;
-
-		required = size - priv_dev->out_mem_is_allocated;
-
-		if (required > remained)
-			return -EPERM;
-
-		priv_dev->out_mem_is_allocated += required;
-		priv_dev->onchip_used_size += required;
-	}
-
-	return 0;
-}
-
-void cdns3_configure_dmult(struct cdns3_device *priv_dev,
-			   struct cdns3_endpoint *priv_ep)
-{
-	struct cdns3_usb_regs __iomem *regs = priv_dev->regs;
-
-	/* For dev_ver > DEV_VER_V2 DMULT is configured per endpoint */
-	if (priv_dev->dev_ver <= DEV_VER_V2)
-		writel(USB_CONF_DMULT, &regs->usb_conf);
-
-	if (priv_dev->dev_ver == DEV_VER_V2)
-		writel(USB_CONF2_EN_TDL_TRB, &regs->usb_conf2);
-
-	if (priv_dev->dev_ver >= DEV_VER_V3 && priv_ep) {
-		u32 mask;
-
-		if (priv_ep->dir)
-			mask = BIT(priv_ep->num + 16);
-		else
-			mask = BIT(priv_ep->num);
-
-		if (priv_ep->type != USB_ENDPOINT_XFER_ISOC) {
-			cdns3_set_register_bit(&regs->tdl_from_trb, mask);
-			cdns3_set_register_bit(&regs->tdl_beh, mask);
-			cdns3_set_register_bit(&regs->tdl_beh2, mask);
-			cdns3_set_register_bit(&regs->dma_adv_td, mask);
-		}
-
-		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC && !priv_ep->dir)
-			cdns3_set_register_bit(&regs->tdl_from_trb, mask);
-
-		cdns3_set_register_bit(&regs->dtrans, mask);
-	}
-}
-
-/**
- * cdns3_ep_config Configure hardware endpoint
- * @priv_ep: extended endpoint object
- */
-void cdns3_ep_config(struct cdns3_endpoint *priv_ep)
-{
-	bool is_iso_ep = (priv_ep->type == USB_ENDPOINT_XFER_ISOC);
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-	u32 bEndpointAddress = priv_ep->num | priv_ep->dir;
-	u32 max_packet_size = 0;
-	u8 maxburst = 0;
-	u32 ep_cfg = 0;
-	u8 buffering;
-	u8 mult = 0;
-	int ret;
-
-	buffering = CDNS3_EP_BUF_SIZE - 1;
-
-	cdns3_configure_dmult(priv_dev, priv_ep);
-
-	switch (priv_ep->type) {
-	case USB_ENDPOINT_XFER_INT:
-		ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_INT);
-
-		if ((priv_dev->dev_ver == DEV_VER_V2 && !priv_ep->dir) ||
-		    priv_dev->dev_ver > DEV_VER_V2)
-			ep_cfg |= EP_CFG_TDL_CHK;
-		break;
-	case USB_ENDPOINT_XFER_BULK:
-		ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_BULK);
-
-		if ((priv_dev->dev_ver == DEV_VER_V2  && !priv_ep->dir) ||
-		    priv_dev->dev_ver > DEV_VER_V2)
-			ep_cfg |= EP_CFG_TDL_CHK;
-		break;
-	default:
-		ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_ISOC);
-		mult = CDNS3_EP_ISO_HS_MULT - 1;
-		buffering = mult + 1;
-	}
-
-	switch (priv_dev->gadget.speed) {
-	case USB_SPEED_FULL:
-		max_packet_size = is_iso_ep ? 1023 : 64;
-		break;
-	case USB_SPEED_HIGH:
-		max_packet_size = is_iso_ep ? 1024 : 512;
-		break;
-	case USB_SPEED_SUPER:
-		/* It's limitation that driver assumes in driver. */
-		mult = 0;
-		max_packet_size = 1024;
-		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC) {
-			maxburst = CDNS3_EP_ISO_SS_BURST - 1;
-			buffering = (mult + 1) *
-				    (maxburst + 1);
-
-			if (priv_ep->interval > 1)
-				buffering++;
-		} else {
-			maxburst = CDNS3_EP_BUF_SIZE - 1;
-		}
-		break;
-	default:
-		/* all other speed are not supported */
-		return;
-	}
-
-	if (max_packet_size == 1024)
-		priv_ep->trb_burst_size = 128;
-	else if (max_packet_size >= 512)
-		priv_ep->trb_burst_size = 64;
-	else
-		priv_ep->trb_burst_size = 16;
-
-	ret = cdns3_ep_onchip_buffer_reserve(priv_dev, buffering + 1,
-					     !!priv_ep->dir);
-	if (ret) {
-		dev_err(priv_dev->dev, "onchip mem is full, ep is invalid\n");
-		return;
-	}
-
-	ep_cfg |= EP_CFG_MAXPKTSIZE(max_packet_size) |
-		  EP_CFG_MULT(mult) |
-		  EP_CFG_BUFFERING(buffering) |
-		  EP_CFG_MAXBURST(maxburst);
-
-	cdns3_select_ep(priv_dev, bEndpointAddress);
-	writel(ep_cfg, &priv_dev->regs->ep_cfg);
-
-	dev_dbg(priv_dev->dev, "Configure %s: with val %08x\n",
-		priv_ep->name, ep_cfg);
-}
-
-/* Find correct direction for HW endpoint according to description */
-static int cdns3_ep_dir_is_correct(struct usb_endpoint_descriptor *desc,
-				   struct cdns3_endpoint *priv_ep)
-{
-	return (priv_ep->endpoint.caps.dir_in && usb_endpoint_dir_in(desc)) ||
-	       (priv_ep->endpoint.caps.dir_out && usb_endpoint_dir_out(desc));
-}
-
-static struct
-cdns3_endpoint *cdns3_find_available_ep(struct cdns3_device *priv_dev,
-					struct usb_endpoint_descriptor *desc)
-{
-	struct usb_ep *ep;
-	struct cdns3_endpoint *priv_ep;
-
-	list_for_each_entry(ep, &priv_dev->gadget.ep_list, ep_list) {
-		unsigned long num;
-		int ret;
-		/* ep name pattern likes epXin or epXout */
-		char c[2] = {ep->name[2], '\0'};
-
-		ret = kstrtoul(c, 10, &num);
-		if (ret)
-			return ERR_PTR(ret);
-
-		priv_ep = ep_to_cdns3_ep(ep);
-		if (cdns3_ep_dir_is_correct(desc, priv_ep)) {
-			if (!(priv_ep->flags & EP_CLAIMED)) {
-				priv_ep->num  = num;
-				return priv_ep;
-			}
-		}
-	}
-
-	return ERR_PTR(-ENOENT);
-}
-
-/*
- *  Cadence IP has one limitation that all endpoints must be configured
- * (Type & MaxPacketSize) before setting configuration through hardware
- * register, it means we can't change endpoints configuration after
- * set_configuration.
- *
- * This function set EP_CLAIMED flag which is added when the gadget driver
- * uses usb_ep_autoconfig to configure specific endpoint;
- * When the udc driver receives set_configurion request,
- * it goes through all claimed endpoints, and configure all endpoints
- * accordingly.
- *
- * At usb_ep_ops.enable/disable, we only enable and disable endpoint through
- * ep_cfg register which can be changed after set_configuration, and do
- * some software operation accordingly.
- */
-static struct
-usb_ep *cdns3_gadget_match_ep(struct usb_gadget *gadget,
-			      struct usb_endpoint_descriptor *desc,
-			      struct usb_ss_ep_comp_descriptor *comp_desc)
-{
-	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
-	struct cdns3_endpoint *priv_ep;
-	unsigned long flags;
-
-	priv_ep = cdns3_find_available_ep(priv_dev, desc);
-	if (IS_ERR(priv_ep)) {
-		dev_err(priv_dev->dev, "no available ep\n");
-		return NULL;
-	}
-
-	dev_dbg(priv_dev->dev, "match endpoint: %s\n", priv_ep->name);
-
-	spin_lock_irqsave(&priv_dev->lock, flags);
-	priv_ep->endpoint.desc = desc;
-	priv_ep->dir  = usb_endpoint_dir_in(desc) ? USB_DIR_IN : USB_DIR_OUT;
-	priv_ep->type = usb_endpoint_type(desc);
-	priv_ep->flags |= EP_CLAIMED;
-	priv_ep->interval = desc->bInterval ? BIT(desc->bInterval - 1) : 0;
-
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-	return &priv_ep->endpoint;
-}
-
-/**
- * cdns3_gadget_ep_alloc_request Allocates request
- * @ep: endpoint object associated with request
- * @gfp_flags: gfp flags
- *
- * Returns allocated request address, NULL on allocation error
- */
-struct usb_request *cdns3_gadget_ep_alloc_request(struct usb_ep *ep,
-						  gfp_t gfp_flags)
-{
-	struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
-	struct cdns3_request *priv_req;
-
-	priv_req = kzalloc(sizeof(*priv_req), gfp_flags);
-	if (!priv_req)
-		return NULL;
-
-	priv_req->priv_ep = priv_ep;
-
-	trace_cdns3_alloc_request(priv_req);
-	return &priv_req->request;
-}
-
-/**
- * cdns3_gadget_ep_free_request Free memory occupied by request
- * @ep: endpoint object associated with request
- * @request: request to free memory
- */
-void cdns3_gadget_ep_free_request(struct usb_ep *ep,
-				  struct usb_request *request)
-{
-	struct cdns3_request *priv_req = to_cdns3_request(request);
-
-	if (priv_req->aligned_buf)
-		priv_req->aligned_buf->in_use = 0;
-
-	trace_cdns3_free_request(priv_req);
-	kfree(priv_req);
-}
-
-/**
- * cdns3_gadget_ep_enable Enable endpoint
- * @ep: endpoint object
- * @desc: endpoint descriptor
- *
- * Returns 0 on success, error code elsewhere
- */
-static int cdns3_gadget_ep_enable(struct usb_ep *ep,
-				  const struct usb_endpoint_descriptor *desc)
-{
-	struct cdns3_endpoint *priv_ep;
-	struct cdns3_device *priv_dev;
-	u32 reg = EP_STS_EN_TRBERREN;
-	u32 bEndpointAddress;
-	unsigned long flags;
-	int enable = 1;
-	int ret;
-
-	priv_ep = ep_to_cdns3_ep(ep);
-	priv_dev = priv_ep->cdns3_dev;
-
-	if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) {
-		dev_dbg(priv_dev->dev, "usbss: invalid parameters\n");
-		return -EINVAL;
-	}
-
-	if (!desc->wMaxPacketSize) {
-		dev_err(priv_dev->dev, "usbss: missing wMaxPacketSize\n");
-		return -EINVAL;
-	}
-
-	if (dev_WARN_ONCE(priv_dev->dev, priv_ep->flags & EP_ENABLED,
-			  "%s is already enabled\n", priv_ep->name))
-		return 0;
-
-	spin_lock_irqsave(&priv_dev->lock, flags);
-
-	priv_ep->endpoint.desc = desc;
-	priv_ep->type = usb_endpoint_type(desc);
-	priv_ep->interval = desc->bInterval ? BIT(desc->bInterval - 1) : 0;
-
-	if (priv_ep->interval > ISO_MAX_INTERVAL &&
-	    priv_ep->type == USB_ENDPOINT_XFER_ISOC) {
-		dev_err(priv_dev->dev, "Driver is limited to %d period\n",
-			ISO_MAX_INTERVAL);
-
-		ret =  -EINVAL;
-		goto exit;
-	}
-
-	ret = cdns3_allocate_trb_pool(priv_ep);
-
-	if (ret)
-		goto exit;
-
-	bEndpointAddress = priv_ep->num | priv_ep->dir;
-	cdns3_select_ep(priv_dev, bEndpointAddress);
-
-	trace_cdns3_gadget_ep_enable(priv_ep);
-
-	writel(EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
-
-	ret = cdns3_handshake(&priv_dev->regs->ep_cmd,
-			      EP_CMD_CSTALL | EP_CMD_EPRST, 0, 1000);
-
-	if (unlikely(ret)) {
-		cdns3_free_trb_pool(priv_ep);
-		ret =  -EINVAL;
-		goto exit;
-	}
-
-	/* enable interrupt for selected endpoint */
-	cdns3_set_register_bit(&priv_dev->regs->ep_ien,
-			       BIT(cdns3_ep_addr_to_index(bEndpointAddress)));
-
-	writel(reg, &priv_dev->regs->ep_sts_en);
-
-	/*
-	 * For some versions of controller at some point during ISO OUT traffic
-	 * DMA reads Transfer Ring for the EP which has never got doorbell.
-	 * This issue was detected only on simulation, but to avoid this issue
-	 * driver add protection against it. To fix it driver enable ISO OUT
-	 * endpoint before setting DRBL. This special treatment of ISO OUT
-	 * endpoints are recommended by controller specification.
-	 */
-	if (priv_ep->type == USB_ENDPOINT_XFER_ISOC  && !priv_ep->dir)
-		enable = 0;
-
-	if (enable)
-		cdns3_set_register_bit(&priv_dev->regs->ep_cfg, EP_CFG_ENABLE);
-
-	ep->desc = desc;
-	priv_ep->flags &= ~(EP_PENDING_REQUEST | EP_STALL |
-			    EP_QUIRK_ISO_OUT_EN);
-	priv_ep->flags |= EP_ENABLED | EP_UPDATE_EP_TRBADDR;
-	priv_ep->wa1_set = 0;
-	priv_ep->enqueue = 0;
-	priv_ep->dequeue = 0;
-	reg = readl(&priv_dev->regs->ep_sts);
-	priv_ep->pcs = !!EP_STS_CCS(reg);
-	priv_ep->ccs = !!EP_STS_CCS(reg);
-	/* one TRB is reserved for link TRB used in DMULT mode*/
-	priv_ep->free_trbs = priv_ep->num_trbs - 1;
-exit:
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-
-	return ret;
-}
-
-/**
- * cdns3_gadget_ep_disable Disable endpoint
- * @ep: endpoint object
- *
- * Returns 0 on success, error code elsewhere
- */
-static int cdns3_gadget_ep_disable(struct usb_ep *ep)
-{
-	struct cdns3_endpoint *priv_ep;
-	struct cdns3_device *priv_dev;
-	struct usb_request *request;
-	unsigned long flags;
-	int ret = 0;
-	u32 ep_cfg;
-
-	if (!ep) {
-		pr_err("usbss: invalid parameters\n");
-		return -EINVAL;
-	}
-
-	priv_ep = ep_to_cdns3_ep(ep);
-	priv_dev = priv_ep->cdns3_dev;
-
-	if (dev_WARN_ONCE(priv_dev->dev, !(priv_ep->flags & EP_ENABLED),
-			  "%s is already disabled\n", priv_ep->name))
-		return 0;
-
-	spin_lock_irqsave(&priv_dev->lock, flags);
-
-	trace_cdns3_gadget_ep_disable(priv_ep);
-
-	cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress);
-
-	ep_cfg = readl(&priv_dev->regs->ep_cfg);
-	ep_cfg &= ~EP_CFG_ENABLE;
-	writel(ep_cfg, &priv_dev->regs->ep_cfg);
-
-	/**
-	 * Driver needs some time before resetting endpoint.
-	 * It need waits for clearing DBUSY bit or for timeout expired.
-	 * 10us is enough time for controller to stop transfer.
-	 */
-	cdns3_handshake(&priv_dev->regs->ep_sts,
-			EP_STS_DBUSY, 0, 10);
-
-	writel(EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
-
-	ret = cdns3_handshake(&priv_dev->regs->ep_cmd,
-			      EP_CMD_CSTALL | EP_CMD_EPRST, 0, 1000);
-
-	if (unlikely(ret))
-		dev_err(priv_dev->dev, "Timeout: %s resetting failed.\n",
-			priv_ep->name);
-
-	while (!list_empty(&priv_ep->pending_req_list)) {
-		request = cdns3_next_request(&priv_ep->pending_req_list);
-
-		cdns3_gadget_giveback(priv_ep, to_cdns3_request(request),
-				      -ESHUTDOWN);
-	}
-
-	while (!list_empty(&priv_ep->deferred_req_list)) {
-		request = cdns3_next_request(&priv_ep->deferred_req_list);
-
-		cdns3_gadget_giveback(priv_ep, to_cdns3_request(request),
-				      -ESHUTDOWN);
-	}
-
-	ep->desc = NULL;
-	priv_ep->flags &= ~EP_ENABLED;
-
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-
-	return ret;
-}
-
-/**
- * cdns3_gadget_ep_queue Transfer data on endpoint
- * @ep: endpoint object
- * @request: request object
- * @gfp_flags: gfp flags
- *
- * Returns 0 on success, error code elsewhere
- */
-static int __cdns3_gadget_ep_queue(struct usb_ep *ep,
-				   struct usb_request *request,
-				   gfp_t gfp_flags)
-{
-	struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-	struct cdns3_request *priv_req;
-	int ret = 0;
-
-	request->actual = 0;
-	request->status = -EINPROGRESS;
-	priv_req = to_cdns3_request(request);
-	trace_cdns3_ep_queue(priv_req);
-
-	ret = cdns3_prepare_aligned_request_buf(priv_req);
-	if (ret < 0)
-		return ret;
-
-	ret = usb_gadget_map_request_by_dev(priv_dev->sysdev, request,
-					    usb_endpoint_dir_in(ep->desc));
-	if (ret)
-		return ret;
-
-	list_add_tail(&request->list, &priv_ep->deferred_req_list);
-
-	/*
-	 * If hardware endpoint configuration has not been set yet then
-	 * just queue request in deferred list. Transfer will be started in
-	 * cdns3_set_hw_configuration.
-	 */
-	if (priv_dev->hw_configured_flag)
-		cdns3_start_all_request(priv_dev, priv_ep);
-
-	return 0;
-}
-
-static int cdns3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request,
-				 gfp_t gfp_flags)
-{
-	struct usb_request *zlp_request;
-	struct cdns3_endpoint *priv_ep;
-	struct cdns3_device *priv_dev;
-	unsigned long flags;
-	int ret;
-
-	if (!request || !ep)
-		return -EINVAL;
-
-	priv_ep = ep_to_cdns3_ep(ep);
-	priv_dev = priv_ep->cdns3_dev;
-
-	spin_lock_irqsave(&priv_dev->lock, flags);
-
-	ret = __cdns3_gadget_ep_queue(ep, request, gfp_flags);
-
-	if (ret == 0 && request->zero && request->length &&
-	    (request->length % ep->maxpacket == 0)) {
-		struct cdns3_request *priv_req;
-
-		zlp_request = cdns3_gadget_ep_alloc_request(ep, GFP_ATOMIC);
-		zlp_request->buf = priv_dev->zlp_buf;
-		zlp_request->length = 0;
-
-		priv_req = to_cdns3_request(zlp_request);
-		priv_req->flags |= REQUEST_ZLP;
-
-		dev_dbg(priv_dev->dev, "Queuing ZLP for endpoint: %s\n",
-			priv_ep->name);
-		ret = __cdns3_gadget_ep_queue(ep, zlp_request, gfp_flags);
-	}
-
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-	return ret;
-}
-
-/**
- * cdns3_gadget_ep_dequeue Remove request from transfer queue
- * @ep: endpoint object associated with request
- * @request: request object
- *
- * Returns 0 on success, error code elsewhere
- */
-int cdns3_gadget_ep_dequeue(struct usb_ep *ep,
-			    struct usb_request *request)
-{
-	struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-	struct usb_request *req, *req_temp;
-	struct cdns3_request *priv_req;
-	struct cdns3_trb *link_trb;
-	unsigned long flags;
-	int ret = 0;
-
-	if (!ep || !request || !ep->desc)
-		return -EINVAL;
-
-	spin_lock_irqsave(&priv_dev->lock, flags);
-
-	priv_req = to_cdns3_request(request);
-
-	trace_cdns3_ep_dequeue(priv_req);
-
-	cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress);
-
-	list_for_each_entry_safe(req, req_temp, &priv_ep->pending_req_list,
-				 list) {
-		if (request == req)
-			goto found;
-	}
-
-	list_for_each_entry_safe(req, req_temp, &priv_ep->deferred_req_list,
-				 list) {
-		if (request == req)
-			goto found;
-	}
-
-	goto not_found;
-
-found:
-
-	if (priv_ep->wa1_trb == priv_req->trb)
-		cdns3_wa1_restore_cycle_bit(priv_ep);
-
-	link_trb = priv_req->trb;
-	cdns3_move_deq_to_next_trb(priv_req);
-	cdns3_gadget_giveback(priv_ep, priv_req, -ECONNRESET);
-
-	/* Update ring */
-	request = cdns3_next_request(&priv_ep->deferred_req_list);
-	if (request) {
-		priv_req = to_cdns3_request(request);
-
-		link_trb->buffer = TRB_BUFFER(priv_ep->trb_pool_dma +
-					      (priv_req->start_trb * TRB_SIZE));
-		link_trb->control = (link_trb->control & TRB_CYCLE) |
-				    TRB_TYPE(TRB_LINK) | TRB_CHAIN | TRB_TOGGLE;
-	} else {
-		priv_ep->flags |= EP_UPDATE_EP_TRBADDR;
-	}
-
-not_found:
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-	return ret;
-}
-
-/**
- * cdns3_gadget_ep_set_halt Sets/clears stall on selected endpoint
- * @ep: endpoint object to set/clear stall on
- * @value: 1 for set stall, 0 for clear stall
- *
- * Returns 0 on success, error code elsewhere
- */
-int cdns3_gadget_ep_set_halt(struct usb_ep *ep, int value)
-{
-	struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
-	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
-	unsigned long flags;
-	int ret = 0;
-
-	if (!(priv_ep->flags & EP_ENABLED))
-		return -EPERM;
-
-	spin_lock_irqsave(&priv_dev->lock, flags);
-
-	cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress);
-	if (value) {
-		cdns3_ep_stall_flush(priv_ep);
-	} else {
-		priv_ep->flags &= ~EP_WEDGE;
-
-		cdns3_dbg(priv_ep->cdns3_dev, "Clear stalled endpoint %s\n",
-			  priv_ep->name);
-
-		writel(EP_CMD_CSTALL | EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
-
-		/* wait for EPRST cleared */
-		ret = cdns3_handshake(&priv_dev->regs->ep_cmd,
-				      EP_CMD_EPRST, 0, 100);
-		if (unlikely(ret)) {
-			dev_err(priv_dev->dev,
-				"Clearing halt condition failed for %s\n",
-				priv_ep->name);
-			goto finish;
-
-		} else {
-			priv_ep->flags &= ~EP_STALL;
-		}
-	}
-
-	priv_ep->flags &= ~EP_PENDING_REQUEST;
-finish:
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-
-	return ret;
-}
-
-extern const struct usb_ep_ops cdns3_gadget_ep0_ops;
-
-static const struct usb_ep_ops cdns3_gadget_ep_ops = {
-	.enable = cdns3_gadget_ep_enable,
-	.disable = cdns3_gadget_ep_disable,
-	.alloc_request = cdns3_gadget_ep_alloc_request,
-	.free_request = cdns3_gadget_ep_free_request,
-	.queue = cdns3_gadget_ep_queue,
-	.dequeue = cdns3_gadget_ep_dequeue,
-	.set_halt = cdns3_gadget_ep_set_halt,
-	.set_wedge = cdns3_gadget_ep_set_wedge,
-};
-
-/**
- * cdns3_gadget_get_frame Returns number of actual ITP frame
- * @gadget: gadget object
- *
- * Returns number of actual ITP frame
- */
-static int cdns3_gadget_get_frame(struct usb_gadget *gadget)
-{
-	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
-
-	return readl(&priv_dev->regs->usb_itpn);
-}
-
-int __cdns3_gadget_wakeup(struct cdns3_device *priv_dev)
-{
-	enum usb_device_speed speed;
-
-	speed = cdns3_get_speed(priv_dev);
-
-	if (speed >= USB_SPEED_SUPER)
-		return 0;
-
-	/* Start driving resume signaling to indicate remote wakeup. */
-	writel(USB_CONF_LGO_L0, &priv_dev->regs->usb_conf);
-
-	return 0;
-}
-
-static int cdns3_gadget_wakeup(struct usb_gadget *gadget)
-{
-	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
-	unsigned long flags;
-	int ret = 0;
-
-	spin_lock_irqsave(&priv_dev->lock, flags);
-	ret = __cdns3_gadget_wakeup(priv_dev);
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-	return ret;
-}
-
-static int cdns3_gadget_set_selfpowered(struct usb_gadget *gadget,
-					int is_selfpowered)
-{
-	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
-	unsigned long flags;
-
-	spin_lock_irqsave(&priv_dev->lock, flags);
-	priv_dev->is_selfpowered = !!is_selfpowered;
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-	return 0;
-}
-
-static int cdns3_gadget_pullup(struct usb_gadget *gadget, int is_on)
-{
-	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
-
-	if (is_on)
-		writel(USB_CONF_DEVEN, &priv_dev->regs->usb_conf);
-	else
-		writel(USB_CONF_DEVDS, &priv_dev->regs->usb_conf);
-
-	return 0;
-}
-
-static void cdns3_gadget_config(struct cdns3_device *priv_dev)
-{
-	struct cdns3_usb_regs __iomem *regs = priv_dev->regs;
-	u32 reg;
-
-	cdns3_ep0_config(priv_dev);
-
-	/* enable interrupts for endpoint 0 (in and out) */
-	writel(EP_IEN_EP_OUT0 | EP_IEN_EP_IN0, &regs->ep_ien);
-
-	/*
-	 *Driver need modify LFPS minimal U1 Exit time for 0x00024505 revision
-	 * of controller
-	 */
-	if (priv_dev->dev_ver == DEV_VER_TI_V1) {
-		reg = readl(&regs->dbg_link1);
-
-		reg &= ~DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_MASK;
-		reg |= DBG_LINK1_LFPS_MIN_GEN_U1_EXIT(0x55) |
-		       DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_SET;
-		writel(reg, &regs->dbg_link1);
-	}
-
-	/*
-	 * By default some platforms has set protected access to memory.
-	 * This cause problem with cache, so driver restore non-secure
-	 * access to memory.
-	 */
-	reg = readl(&regs->dma_axi_ctrl);
-	reg = DMA_AXI_CTRL_MARPROT(DMA_AXI_CTRL_NON_SECURE) |
-	      DMA_AXI_CTRL_MAWPROT(DMA_AXI_CTRL_NON_SECURE);
-	writel(reg, &regs->dma_axi_ctrl);
-
-	/* enable generic interrupt*/
-	writel(USB_IEN_INIT, &regs->usb_ien);
-	writel(USB_CONF_CLK2OFFDS | USB_CONF_L1DS, &regs->usb_conf);
-
-	cdns3_configure_dmult(priv_dev, NULL);
-
-	cdns3_gadget_pullup(&priv_dev->gadget, 1);
-}
-
-/**
- * cdns3_gadget_udc_start Gadget start
- * @gadget: gadget object
- * @driver: driver which operates on this gadget
- *
- * Returns 0 on success, error code elsewhere
- */
-static int cdns3_gadget_udc_start(struct usb_gadget *gadget,
-				  struct usb_gadget_driver *driver)
-{
-	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
-	unsigned long flags;
-
-	spin_lock_irqsave(&priv_dev->lock, flags);
-	priv_dev->gadget_driver = driver;
-	cdns3_gadget_config(priv_dev);
-	spin_unlock_irqrestore(&priv_dev->lock, flags);
-	return 0;
-}
-
-/**
- * cdns3_gadget_udc_stop Stops gadget
- * @gadget: gadget object
- *
- * Returns 0
- */
-static int cdns3_gadget_udc_stop(struct usb_gadget *gadget)
-{
-	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
-	struct cdns3_endpoint *priv_ep;
-	u32 bEndpointAddress;
-	struct usb_ep *ep;
-	int ret = 0;
-
-	priv_dev->gadget_driver = NULL;
-
-	priv_dev->onchip_used_size = 0;
-	priv_dev->out_mem_is_allocated = 0;
-	priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
-
-	list_for_each_entry(ep, &priv_dev->gadget.ep_list, ep_list) {
-		priv_ep = ep_to_cdns3_ep(ep);
-		bEndpointAddress = priv_ep->num | priv_ep->dir;
-		cdns3_select_ep(priv_dev, bEndpointAddress);
-		writel(EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
-		ret = cdns3_handshake(&priv_dev->regs->ep_cmd,
-				      EP_CMD_EPRST, 0, 100);
-		cdns3_free_trb_pool(priv_ep);
-	}
-
-	/* disable interrupt for device */
-	writel(0, &priv_dev->regs->usb_ien);
-	writel(USB_CONF_DEVDS, &priv_dev->regs->usb_conf);
-
-	return ret;
-}
-
-static const struct usb_gadget_ops cdns3_gadget_ops = {
-	.get_frame = cdns3_gadget_get_frame,
-	.wakeup = cdns3_gadget_wakeup,
-	.set_selfpowered = cdns3_gadget_set_selfpowered,
-	.pullup = cdns3_gadget_pullup,
-	.udc_start = cdns3_gadget_udc_start,
-	.udc_stop = cdns3_gadget_udc_stop,
-	.match_ep = cdns3_gadget_match_ep,
-};
-
-static void cdns3_free_all_eps(struct cdns3_device *priv_dev)
-{
-	int i;
-
-	/*ep0 OUT point to ep0 IN*/
-	priv_dev->eps[16] = NULL;
-
-	cdns3_free_trb_pool(priv_dev->eps[0]);
-
-	for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++)
-		if (priv_dev->eps[i])
-			devm_kfree(priv_dev->dev, priv_dev->eps[i]);
-}
-
-/**
- * cdns3_init_eps Initializes software endpoints of gadget
- * @cdns3: extended gadget object
- *
- * Returns 0 on success, error code elsewhere
- */
-static int cdns3_init_eps(struct cdns3_device *priv_dev)
-{
-	u32 ep_enabled_reg, iso_ep_reg;
-	struct cdns3_endpoint *priv_ep;
-	int ep_dir, ep_number;
-	u32 ep_mask;
-	int ret = 0;
-	int i;
-
-	/* Read it from USB_CAP3 to USB_CAP5 */
-	ep_enabled_reg = readl(&priv_dev->regs->usb_cap3);
-	iso_ep_reg = readl(&priv_dev->regs->usb_cap4);
-
-	dev_dbg(priv_dev->dev, "Initializing non-zero endpoints\n");
-
-	for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) {
-		ep_dir = i >> 4;	/* i div 16 */
-		ep_number = i & 0xF;	/* i % 16 */
-		ep_mask = BIT(i);
-
-		if (!(ep_enabled_reg & ep_mask))
-			continue;
-
-		if (ep_dir && !ep_number) {
-			priv_dev->eps[i] = priv_dev->eps[0];
-			continue;
-		}
-
-		priv_ep = devm_kzalloc(priv_dev->dev, sizeof(*priv_ep),
-				       GFP_KERNEL);
-		if (!priv_ep) {
-			ret = -ENOMEM;
-			goto err;
-		}
-
-		/* set parent of endpoint object */
-		priv_ep->cdns3_dev = priv_dev;
-		priv_dev->eps[i] = priv_ep;
-		priv_ep->num = ep_number;
-		priv_ep->dir = ep_dir ? USB_DIR_IN : USB_DIR_OUT;
-
-		if (!ep_number) {
-			ret = cdns3_init_ep0(priv_dev, priv_ep);
-			if (ret) {
-				dev_err(priv_dev->dev, "Failed to init ep0\n");
-				goto err;
-			}
-		} else {
-			snprintf(priv_ep->name, sizeof(priv_ep->name), "ep%d%s",
-				 ep_number, !!ep_dir ? "in" : "out");
-			priv_ep->endpoint.name = priv_ep->name;
-
-			usb_ep_set_maxpacket_limit(&priv_ep->endpoint,
-						   CDNS3_EP_MAX_PACKET_LIMIT);
-			priv_ep->endpoint.max_streams = CDNS3_EP_MAX_STREAMS;
-			priv_ep->endpoint.ops = &cdns3_gadget_ep_ops;
-			if (ep_dir)
-				priv_ep->endpoint.caps.dir_in = 1;
-			else
-				priv_ep->endpoint.caps.dir_out = 1;
-
-			if (iso_ep_reg & ep_mask)
-				priv_ep->endpoint.caps.type_iso = 1;
-
-			priv_ep->endpoint.caps.type_bulk = 1;
-			priv_ep->endpoint.caps.type_int = 1;
-
-			list_add_tail(&priv_ep->endpoint.ep_list,
-				      &priv_dev->gadget.ep_list);
-		}
-
-		priv_ep->flags = 0;
-
-		dev_info(priv_dev->dev, "Initialized  %s support: %s %s\n",
-			 priv_ep->name,
-			 priv_ep->endpoint.caps.type_bulk ? "BULK, INT" : "",
-			 priv_ep->endpoint.caps.type_iso ? "ISO" : "");
-
-		INIT_LIST_HEAD(&priv_ep->pending_req_list);
-		INIT_LIST_HEAD(&priv_ep->deferred_req_list);
-	}
-
-	return 0;
-err:
-	cdns3_free_all_eps(priv_dev);
-	return -ENOMEM;
-}
-
-void cdns3_gadget_exit(struct cdns3 *cdns)
-{
-	struct cdns3_device *priv_dev;
-
-	priv_dev = cdns->gadget_dev;
-
-	devm_free_irq(cdns->dev, cdns->dev_irq, cdns);
-
-	pm_runtime_mark_last_busy(cdns->dev);
-	pm_runtime_put_autosuspend(cdns->dev);
-
-	usb_del_gadget_udc(&priv_dev->gadget);
-
-	cdns3_free_all_eps(priv_dev);
-
-	while (!list_empty(&priv_dev->aligned_buf_list)) {
-		struct cdns3_aligned_buf *buf;
-
-		buf = cdns3_next_align_buf(&priv_dev->aligned_buf_list);
-		dma_free_coherent(priv_dev->sysdev, buf->size,
-				  buf->buf,
-				  buf->dma);
-
-		list_del(&buf->list);
-		kfree(buf);
-	}
-
-	dma_free_coherent(priv_dev->sysdev, 8, priv_dev->setup_buf,
-			  priv_dev->setup_dma);
-
-	kfree(priv_dev->zlp_buf);
-	kfree(priv_dev);
-	cdns->gadget_dev = NULL;
-	cdns3_drd_switch_gadget(cdns, 0);
-}
-
-static int cdns3_gadget_start(struct cdns3 *cdns)
-{
-	struct cdns3_device *priv_dev;
-	u32 max_speed;
-	int ret;
-
-	priv_dev = kzalloc(sizeof(*priv_dev), GFP_KERNEL);
-	if (!priv_dev)
-		return -ENOMEM;
-
-	cdns->gadget_dev = priv_dev;
-	priv_dev->sysdev = cdns->dev;
-	priv_dev->dev = cdns->dev;
-	priv_dev->regs = cdns->dev_regs;
-
-	device_property_read_u16(priv_dev->dev, "cdns,on-chip-buff-size",
-				 &priv_dev->onchip_buffers);
-
-	if (priv_dev->onchip_buffers <=  0) {
-		u32 reg = readl(&priv_dev->regs->usb_cap2);
-
-		priv_dev->onchip_buffers = USB_CAP2_ACTUAL_MEM_SIZE(reg);
-	}
-
-	if (!priv_dev->onchip_buffers)
-		priv_dev->onchip_buffers = 256;
-
-	max_speed = usb_get_maximum_speed(cdns->dev);
-
-	/* Check the maximum_speed parameter */
-	switch (max_speed) {
-	case USB_SPEED_FULL:
-	case USB_SPEED_HIGH:
-	case USB_SPEED_SUPER:
-		break;
-	default:
-		dev_err(cdns->dev, "invalid maximum_speed parameter %d\n",
-			max_speed);
-		/* fall through */
-	case USB_SPEED_UNKNOWN:
-		/* default to superspeed */
-		max_speed = USB_SPEED_SUPER;
-		break;
-	}
-
-	/* fill gadget fields */
-	priv_dev->gadget.max_speed = max_speed;
-	priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
-	priv_dev->gadget.ops = &cdns3_gadget_ops;
-	priv_dev->gadget.name = "usb-ss-gadget";
-	priv_dev->gadget.sg_supported = 1;
-
-	spin_lock_init(&priv_dev->lock);
-	INIT_WORK(&priv_dev->pending_status_wq,
-		  cdns3_pending_setup_status_handler);
-
-	/* initialize endpoint container */
-	INIT_LIST_HEAD(&priv_dev->gadget.ep_list);
-	INIT_LIST_HEAD(&priv_dev->aligned_buf_list);
-
-	ret = cdns3_init_eps(priv_dev);
-	if (ret) {
-		dev_err(priv_dev->dev, "Failed to create endpoints\n");
-		goto err1;
-	}
-
-	/* allocate memory for setup packet buffer */
-	priv_dev->setup_buf = dma_alloc_coherent(priv_dev->sysdev, 8,
-						 &priv_dev->setup_dma, GFP_DMA);
-	if (!priv_dev->setup_buf) {
-		ret = -ENOMEM;
-		goto err2;
-	}
-
-	priv_dev->dev_ver = readl(&priv_dev->regs->usb_cap6);
-
-	dev_dbg(priv_dev->dev, "Device Controller version: %08x\n",
-		readl(&priv_dev->regs->usb_cap6));
-	dev_dbg(priv_dev->dev, "USB Capabilities:: %08x\n",
-		readl(&priv_dev->regs->usb_cap1));
-	dev_dbg(priv_dev->dev, "On-Chip memory cnfiguration: %08x\n",
-		readl(&priv_dev->regs->usb_cap2));
-
-	priv_dev->dev_ver = GET_DEV_BASE_VERSION(priv_dev->dev_ver);
-
-	priv_dev->zlp_buf = kzalloc(CDNS3_EP_ZLP_BUF_SIZE, GFP_KERNEL);
-	if (!priv_dev->zlp_buf) {
-		ret = -ENOMEM;
-		goto err3;
-	}
-
-	/* add USB gadget device */
-	ret = usb_add_gadget_udc(priv_dev->dev, &priv_dev->gadget);
-	if (ret < 0) {
-		dev_err(priv_dev->dev,
-			"Failed to register USB device controller\n");
-		goto err4;
-	}
-
-	return 0;
-err4:
-	kfree(priv_dev->zlp_buf);
-err3:
-	dma_free_coherent(priv_dev->sysdev, 8, priv_dev->setup_buf,
-			  priv_dev->setup_dma);
-err2:
-	cdns3_free_all_eps(priv_dev);
-err1:
-	cdns->gadget_dev = NULL;
-	return ret;
-}
-
-static int __cdns3_gadget_init(struct cdns3 *cdns)
-{
-	struct cdns3_device *priv_dev;
-	int ret = 0;
-
-	cdns3_drd_switch_gadget(cdns, 1);
-	pm_runtime_get_sync(cdns->dev);
-
-	ret = cdns3_gadget_start(cdns);
-	if (ret)
-		return ret;
-
-	priv_dev = cdns->gadget_dev;
-	ret = devm_request_threaded_irq(cdns->dev, cdns->dev_irq,
-					cdns3_device_irq_handler,
-					cdns3_device_thread_irq_handler,
-					IRQF_SHARED, dev_name(cdns->dev), cdns);
-
-	if (ret)
-		goto err0;
-
-	return 0;
-err0:
-	cdns3_gadget_exit(cdns);
-	return ret;
-}
-
-static int cdns3_gadget_suspend(struct cdns3 *cdns, bool do_wakeup)
-{
-	cdns3_gadget_exit(cdns);
-	return 0;
-}
-
-static int cdns3_gadget_resume(struct cdns3 *cdns, bool hibernated)
-{
-	return cdns3_gadget_start(cdns);
-}
-
-/**
- * cdns3_gadget_init - initialize device structure
- *
- * cdns: cdns3 instance
- *
- * This function initializes the gadget.
- */
-int cdns3_gadget_init(struct cdns3 *cdns)
-{
-	struct cdns3_role_driver *rdrv;
-
-	rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
-	if (!rdrv)
-		return -ENOMEM;
-
-	rdrv->start	= __cdns3_gadget_init;
-	rdrv->stop	= cdns3_gadget_exit;
-	rdrv->suspend	= cdns3_gadget_suspend;
-	rdrv->resume	= cdns3_gadget_resume;
-	rdrv->state	= CDNS3_ROLE_STATE_INACTIVE;
-	rdrv->name	= "gadget";
-	cdns->roles[CDNS3_ROLE_GADGET] = rdrv;
-
-	return 0;
-}

drivers/usb/cdns3/gadget.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * USBSS device controller driver header file
- *
- * Copyright (C) 2018-2019 Cadence.
- * Copyright (C) 2017-2018 NXP
- *
- * Author: Pawel Laszczak <[e-mail]>
- *         Pawel Jez <[e-mail]>
- *         Peter Chen <[e-mail]>
- */
-#ifndef __LINUX_CDNS3_GADGET
-#define __LINUX_CDNS3_GADGET
-#include <linux/usb/gadget.h>
-
-/*
- * USBSS-DEV register interface.
- * This corresponds to the USBSS Device Controller Interface
- */
-
-/**
- * struct cdns3_usb_regs - device controller registers.
- * @usb_conf:      Global Configuration Register.
- * @usb_sts:       Global Status Register.
- * @usb_cmd:       Global Command Register.
- * @usb_itpn:      ITP/SOF number Register.
- * @usb_lpm:       Global Command Register.
- * @usb_ien:       USB Interrupt Enable Register.
- * @usb_ists:      USB Interrupt Status Register.
- * @ep_sel:        Endpoint Select Register.
- * @ep_traddr:     Endpoint Transfer Ring Address Register.
- * @ep_cfg:        Endpoint Configuration Register.
- * @ep_cmd:        Endpoint Command Register.
- * @ep_sts:        Endpoint Status Register.
- * @ep_sts_sid:    Endpoint Status Register.
- * @ep_sts_en:     Endpoint Status Register Enable.
- * @drbl:          Doorbell Register.
- * @ep_ien:        EP Interrupt Enable Register.
- * @ep_ists:       EP Interrupt Status Register.
- * @usb_pwr:       Global Power Configuration Register.
- * @usb_conf2:     Global Configuration Register 2.
- * @usb_cap1:      Capability Register 1.
- * @usb_cap2:      Capability Register 2.
- * @usb_cap3:      Capability Register 3.
- * @usb_cap4:      Capability Register 4.
- * @usb_cap5:      Capability Register 5.
- * @usb_cap6:      Capability Register 6.
- * @usb_cpkt1:     Custom Packet Register 1.
- * @usb_cpkt2:     Custom Packet Register 2.
- * @usb_cpkt3:     Custom Packet Register 3.
- * @ep_dma_ext_addr: Upper address for DMA operations Register.
- * @buf_addr:      Address for On-chip Buffer operations Register.
- * @buf_data:      Data for On-chip Buffer operations Register.
- * @buf_ctrl:      On-chip Buffer Access Control Registe.
- * @dtrans:        DMA Transfer Mode Register.
- * @tdl_from_trb:  Source of TD Configuration Register.
- * @tdl_beh:       TDL Behavior Configuration Register.
- * @ep_tdl:        Endpoint TDL Register.
- * @tdl_beh2:      TDL Behavior 2 Configuration Register.
- * @dma_adv_td:    DMA Advance TD Configuration Register.
- * @reserved1:     Reserved.
- * @cfg_regs:      Configuration registers.
- * @reserved2:     Reserved.
- * @dma_axi_ctrl:  AXI Control register.
- * @dma_axi_id:    AXI ID register.
- * @dma_axi_cap:   AXI Capability register.
- * @dma_axi_ctrl0: AXI Control 0 register.
- * @dma_axi_ctrl1: AXI Control 1 register.
- */
-struct cdns3_usb_regs {
-	__le32 usb_conf;
-	__le32 usb_sts;
-	__le32 usb_cmd;
-	__le32 usb_itpn;
-	__le32 usb_lpm;
-	__le32 usb_ien;
-	__le32 usb_ists;
-	__le32 ep_sel;
-	__le32 ep_traddr;
-	__le32 ep_cfg;
-	__le32 ep_cmd;
-	__le32 ep_sts;
-	__le32 ep_sts_sid;
-	__le32 ep_sts_en;
-	__le32 drbl;
-	__le32 ep_ien;
-	__le32 ep_ists;
-	__le32 usb_pwr;
-	__le32 usb_conf2;
-	__le32 usb_cap1;
-	__le32 usb_cap2;
-	__le32 usb_cap3;
-	__le32 usb_cap4;
-	__le32 usb_cap5;
-	__le32 usb_cap6;
-	__le32 usb_cpkt1;
-	__le32 usb_cpkt2;
-	__le32 usb_cpkt3;
-	__le32 ep_dma_ext_addr;
-	__le32 buf_addr;
-	__le32 buf_data;
-	__le32 buf_ctrl;
-	__le32 dtrans;
-	__le32 tdl_from_trb;
-	__le32 tdl_beh;
-	__le32 ep_tdl;
-	__le32 tdl_beh2;
-	__le32 dma_adv_td;
-	__le32 reserved1[26];
-	__le32 cfg_reg1;
-	__le32 dbg_link1;
-	__le32 dbg_link2;
-	__le32 cfg_regs[74];
-	__le32 reserved2[34];
-	__le32 dma_axi_ctrl;
-	__le32 dma_axi_id;
-	__le32 dma_axi_cap;
-	__le32 dma_axi_ctrl0;
-	__le32 dma_axi_ctrl1;
-};
-
-/* USB_CONF - bitmasks */
-/* Reset USB device configuration. */
-#define USB_CONF_CFGRST		BIT(0)
-/* Set Configuration. */
-#define USB_CONF_CFGSET		BIT(1)
-/* Disconnect USB device in SuperSpeed. */
-#define USB_CONF_USB3DIS	BIT(3)
-/* Disconnect USB device in HS/FS */
-#define USB_CONF_USB2DIS	BIT(4)
-/* Little Endian access - default */
-#define USB_CONF_LENDIAN	BIT(5)
-/*
- * Big Endian access. Driver assume that byte order for
- * SFRs access always is as Little Endian so this bit
- * is not used.
- */
-#define USB_CONF_BENDIAN	BIT(6)
-/* Device software reset. */
-#define USB_CONF_SWRST		BIT(7)
-/* Singular DMA transfer mode. Only for VER < DEV_VER_V3*/
-#define USB_CONF_DSING		BIT(8)
-/* Multiple DMA transfers mode. Only for VER < DEV_VER_V3 */
-#define USB_CONF_DMULT		BIT(9)
-/* DMA clock turn-off enable. */
-#define USB_CONF_DMAOFFEN	BIT(10)
-/* DMA clock turn-off disable. */
-#define USB_CONF_DMAOFFDS	BIT(11)
-/* Clear Force Full Speed. */
-#define USB_CONF_CFORCE_FS	BIT(12)
-/* Set Force Full Speed. */
-#define USB_CONF_SFORCE_FS	BIT(13)
-/* Device enable. */
-#define USB_CONF_DEVEN		BIT(14)
-/* Device disable. */
-#define USB_CONF_DEVDS		BIT(15)
-/* L1 LPM state entry enable (used in HS/FS mode). */
-#define USB_CONF_L1EN		BIT(16)
-/* L1 LPM state entry disable (used in HS/FS mode). */
-#define USB_CONF_L1DS		BIT(17)
-/* USB 2.0 clock gate disable. */
-#define USB_CONF_CLK2OFFEN	BIT(18)
-/* USB 2.0 clock gate enable. */
-#define USB_CONF_CLK2OFFDS	BIT(19)
-/* L0 LPM state entry request (used in HS/FS mode). */
-#define USB_CONF_LGO_L0		BIT(20)
-/* USB 3.0 clock gate disable. */
-#define USB_CONF_CLK3OFFEN	BIT(21)
-/* USB 3.0 clock gate enable. */
-#define USB_CONF_CLK3OFFDS	BIT(22)
-/* Bit 23 is reserved*/
-/* U1 state entry enable (used in SS mode). */
-#define USB_CONF_U1EN		BIT(24)
-/* U1 state entry disable (used in SS mode). */
-#define USB_CONF_U1DS		BIT(25)
-/* U2 state entry enable (used in SS mode). */
-#define USB_CONF_U2EN		BIT(26)
-/* U2 state entry disable (used in SS mode). */
-#define USB_CONF_U2DS		BIT(27)
-/* U0 state entry request (used in SS mode). */
-#define USB_CONF_LGO_U0		BIT(28)
-/* U1 state entry request (used in SS mode). */
-#define USB_CONF_LGO_U1		BIT(29)
-/* U2 state entry request (used in SS mode). */
-#define USB_CONF_LGO_U2		BIT(30)
-/* SS.Inactive state entry request (used in SS mode) */
-#define USB_CONF_LGO_SSINACT	BIT(31)
-
-/* USB_STS - bitmasks */
-/*
- * Configuration status.
- * 1 - device is in the configured state.
- * 0 - device is not configured.
- */
-#define USB_STS_CFGSTS_MASK	BIT(0)
-#define USB_STS_CFGSTS(p)	((p) & USB_STS_CFGSTS_MASK)
-/*
- * On-chip memory overflow.
- * 0 - On-chip memory status OK.
- * 1 - On-chip memory overflow.
- */
-#define USB_STS_OV_MASK		BIT(1)
-#define USB_STS_OV(p)		((p) & USB_STS_OV_MASK)
-/*
- * SuperSpeed connection status.
- * 0 - USB in SuperSpeed mode disconnected.
- * 1 - USB in SuperSpeed mode connected.
- */
-#define USB_STS_USB3CONS_MASK	BIT(2)
-#define USB_STS_USB3CONS(p)	((p) & USB_STS_USB3CONS_MASK)
-/*
- * DMA transfer configuration status.
- * 0 - single request.
- * 1 - multiple TRB chain
- * Supported only for controller version <  DEV_VER_V3
- */
-#define USB_STS_DTRANS_MASK	BIT(3)
-#define USB_STS_DTRANS(p)	((p) & USB_STS_DTRANS_MASK)
-/*
- * Device speed.
- * 0 - Undefined (value after reset).
- * 1 - Low speed
- * 2 - Full speed
- * 3 - High speed
- * 4 - Super speed
- */
-#define USB_STS_USBSPEED_MASK	GENMASK(6, 4)
-#define USB_STS_USBSPEED(p)	(((p) & USB_STS_USBSPEED_MASK) >> 4)
-#define USB_STS_LS		(0x1 << 4)
-#define USB_STS_FS		(0x2 << 4)
-#define USB_STS_HS		(0x3 << 4)
-#define USB_STS_SS		(0x4 << 4)
-#define DEV_UNDEFSPEED(p)	(((p) & USB_STS_USBSPEED_MASK) == (0x0 << 4))
-#define DEV_LOWSPEED(p)		(((p) & USB_STS_USBSPEED_MASK) == USB_STS_LS)
-#define DEV_FULLSPEED(p)	(((p) & USB_STS_USBSPEED_MASK) == USB_STS_FS)
-#define DEV_HIGHSPEED(p)	(((p) & USB_STS_USBSPEED_MASK) == USB_STS_HS)
-#define DEV_SUPERSPEED(p)	(((p) & USB_STS_USBSPEED_MASK) == USB_STS_SS)
-/*
- * Endianness for SFR access.
- * 0 - Little Endian order (default after hardware reset).
- * 1 - Big Endian order
- */
-#define USB_STS_ENDIAN_MASK	BIT(7)
-#define USB_STS_ENDIAN(p)	((p) & USB_STS_ENDIAN_MASK)
-/*
- * HS/FS clock turn-off status.
- * 0 - hsfs clock is always on.
- * 1 - hsfs clock turn-off in L2 (HS/FS mode) is enabled
- *          (default after hardware reset).
- */
-#define USB_STS_CLK2OFF_MASK	BIT(8)
-#define USB_STS_CLK2OFF(p)	((p) & USB_STS_CLK2OFF_MASK)
-/*
- * PCLK clock turn-off status.
- * 0 - pclk clock is always on.
- * 1 - pclk clock turn-off in U3 (SS mode) is enabled
- *          (default after hardware reset).
- */
-#define USB_STS_CLK3OFF_MASK	BIT(9)
-#define USB_STS_CLK3OFF(p)	((p) & USB_STS_CLK3OFF_MASK)
-/*
- * Controller in reset state.
- * 0 - Internal reset is active.
- * 1 - Internal reset is not active and controller is fully operational.
- */
-#define USB_STS_IN_RST_MASK	BIT(10)
-#define USB_STS_IN_RST(p)	((p) & USB_STS_IN_RST_MASK)
-/*
- * Status of the "TDL calculation basing on TRB" feature.
- * 0 - disabled
- * 1 - enabled
- * Supported only for DEV_VER_V2 controller version.
- */
-#define USB_STS_TDL_TRB_ENABLED	BIT(11)
-/*
- * Device enable Status.
- * 0 - USB device is disabled (VBUS input is disconnected from internal logic).
- * 1 - USB device is enabled (VBUS input is connected to the internal logic).
- */
-#define USB_STS_DEVS_MASK	BIT(14)
-#define USB_STS_DEVS(p)		((p) & USB_STS_DEVS_MASK)
-/*
- * Address status.
- * 0 - USB device is default state.
- * 1 - USB device is at least in address state.
- */
-#define USB_STS_ADDRESSED_MASK	BIT(15)
-#define USB_STS_ADDRESSED(p)	((p) & USB_STS_ADDRESSED_MASK)
-/*
- * L1 LPM state enable status (used in HS/FS mode).
- * 0 - Entering to L1 LPM state disabled.
- * 1 - Entering to L1 LPM state enabled.
- */
-#define USB_STS_L1ENS_MASK	BIT(16)
-#define USB_STS_L1ENS(p)	((p) & USB_STS_L1ENS_MASK)
-/*
- * Internal VBUS connection status (used both in HS/FS  and SS mode).
- * 0 - internal VBUS is not detected.
- * 1 - internal VBUS is detected.
- */
-#define USB_STS_VBUSS_MASK	BIT(17)
-#define USB_STS_VBUSS(p)	((p) & USB_STS_VBUSS_MASK)
-/*
- * HS/FS LPM  state (used in FS/HS mode).
- * 0 - L0 State
- * 1 - L1 State
- * 2 - L2 State
- * 3 - L3 State
- */
-#define USB_STS_LPMST_MASK	GENMASK(19, 18)
-#define DEV_L0_STATE(p)		(((p) & USB_STS_LPMST_MASK) == (0x0 << 18))
-#define DEV_L1_STATE(p)		(((p) & USB_STS_LPMST_MASK) == (0x1 << 18))
-#define DEV_L2_STATE(p)		(((p) & USB_STS_LPMST_MASK) == (0x2 << 18))
-#define DEV_L3_STATE(p)		(((p) & USB_STS_LPMST_MASK) == (0x3 << 18))
-/*
- * Disable HS status (used in FS/HS mode).
- * 0 - the disconnect bit for HS/FS mode is set .
- * 1 - the disconnect bit for HS/FS mode is not set.
- */
-#define USB_STS_USB2CONS_MASK	BIT(20)
-#define USB_STS_USB2CONS(p)	((p) & USB_STS_USB2CONS_MASK)
-/*
- * HS/FS mode connection status (used in FS/HS mode).
- * 0 - High Speed operations in USB2.0 (FS/HS) mode not disabled.
- * 1 - High Speed operations in USB2.0 (FS/HS).
- */
-#define USB_STS_DISABLE_HS_MASK	BIT(21)
-#define USB_STS_DISABLE_HS(p)	((p) & USB_STS_DISABLE_HS_MASK)
-/*
- * U1 state enable status (used in SS mode).
- * 0 - Entering to  U1 state disabled.
- * 1 - Entering to  U1 state enabled.
- */
-#define USB_STS_U1ENS_MASK	BIT(24)
-#define USB_STS_U1ENS(p)	((p) & USB_STS_U1ENS_MASK)
-/*
- * U2 state enable status (used in SS mode).
- * 0 - Entering to  U2 state disabled.
- * 1 - Entering to  U2 state enabled.
- */
-#define USB_STS_U2ENS_MASK	BIT(25)
-#define USB_STS_U2ENS(p)	((p) & USB_STS_U2ENS_MASK)
-/*
- * SuperSpeed Link LTSSM state. This field reflects USBSS-DEV current
- * SuperSpeed link state
- */
-#define USB_STS_LST_MASK	GENMASK(29, 26)
-#define DEV_LST_U0		(((p) & USB_STS_LST_MASK) == (0x0 << 26))
-#define DEV_LST_U1		(((p) & USB_STS_LST_MASK) == (0x1 << 26))
-#define DEV_LST_U2		(((p) & USB_STS_LST_MASK) == (0x2 << 26))
-#define DEV_LST_U3		(((p) & USB_STS_LST_MASK) == (0x3 << 26))
-#define DEV_LST_DISABLED	(((p) & USB_STS_LST_MASK) == (0x4 << 26))
-#define DEV_LST_RXDETECT	(((p) & USB_STS_LST_MASK) == (0x5 << 26))
-#define DEV_LST_INACTIVE	(((p) & USB_STS_LST_MASK) == (0x6 << 26))
-#define DEV_LST_POLLING		(((p) & USB_STS_LST_MASK) == (0x7 << 26))
-#define DEV_LST_RECOVERY	(((p) & USB_STS_LST_MASK) == (0x8 << 26))
-#define DEV_LST_HOT_RESET	(((p) & USB_STS_LST_MASK) == (0x9 << 26))
-#define DEV_LST_COMP_MODE	(((p) & USB_STS_LST_MASK) == (0xa << 26))
-#define DEV_LST_LB_STATE	(((p) & USB_STS_LST_MASK) == (0xb << 26))
-/*
- * DMA clock turn-off status.
- * 0 - DMA clock is always on (default after hardware reset).
- * 1 - DMA clock turn-off in U1, U2 and U3 (SS mode) is enabled.
- */
-#define USB_STS_DMAOFF_MASK	BIT(30)
-#define USB_STS_DMAOFF(p)	((p) & USB_STS_DMAOFF_MASK)
-/*
- * SFR Endian status.
- * 0 - Little Endian order (default after hardware reset).
- * 1 - Big Endian order.
- */
-#define USB_STS_ENDIAN2_MASK	BIT(31)
-#define USB_STS_ENDIAN2(p)	((p) & USB_STS_ENDIAN2_MASK)
-
-/* USB_CMD -  bitmasks */
-/* Set Function Address */
-#define USB_CMD_SET_ADDR	BIT(0)
-/*
- * Function Address This field is saved to the device only when the field
- * SET_ADDR is set '1 ' during write to USB_CMD register.
- * Software is responsible for entering the address of the device during
- * SET_ADDRESS request service. This field should be set immediately after
- * the SETUP packet is decoded, and prior to confirmation of the status phase
- */
-#define USB_CMD_FADDR_MASK	GENMASK(7, 1)
-#define USB_CMD_FADDR(p)	(((p) << 1) & USB_CMD_FADDR_MASK)
-/* Send Function Wake Device Notification TP (used only in SS mode). */
-#define USB_CMD_SDNFW		BIT(8)
-/* Set Test Mode (used only in HS/FS mode). */
-#define USB_CMD_STMODE		BIT(9)
-/* Test mode selector (used only in HS/FS mode) */
-#define USB_STS_TMODE_SEL_MASK	GENMASK(11, 10)
-#define USB_STS_TMODE_SEL(p)	(((p) << 10) & USB_STS_TMODE_SEL_MASK)
-/*
- *  Send Latency Tolerance Message Device Notification TP (used only
- *  in SS mode).
- */
-#define USB_CMD_SDNLTM		BIT(12)
-/* Send Custom Transaction Packet (used only in SS mode) */
-#define USB_CMD_SPKT		BIT(13)
-/*Device Notification 'Function Wake' - Interface value (only in SS mode. */
-#define USB_CMD_DNFW_INT_MASK	GENMASK(23, 16)
-#define USB_STS_DNFW_INT(p)	(((p) << 16) & USB_CMD_DNFW_INT_MASK)
-/*
- * Device Notification 'Latency Tolerance Message' -373 BELT value [7:0]
- * (used only in SS mode).
- */
-#define USB_CMD_DNLTM_BELT_MASK	GENMASK(27, 16)
-#define USB_STS_DNLTM_BELT(p)	(((p) << 16) & USB_CMD_DNLTM_BELT_MASK)
-
-/* USB_ITPN - bitmasks */
-/*
- * ITP(SS) / SOF (HS/FS) number
- * In SS mode this field represent number of last ITP received from host.
- * In HS/FS mode this field represent number of last SOF received from host.
- */
-#define USB_ITPN_MASK		GENMASK(13, 0)
-#define USB_ITPN(p)		((p) & USB_ITPN_MASK)
-
-/* USB_LPM - bitmasks */
-/* Host Initiated Resume Duration. */
-#define USB_LPM_HIRD_MASK	GENMASK(3, 0)
-#define USB_LPM_HIRD(p)		((p) & USB_LPM_HIRD_MASK)
-/* Remote Wakeup Enable (bRemoteWake). */
-#define USB_LPM_BRW		BIT(4)
-
-/* USB_IEN - bitmasks */
-/* SS connection interrupt enable */
-#define USB_IEN_CONIEN		BIT(0)
-/* SS disconnection interrupt enable. */
-#define USB_IEN_DISIEN		BIT(1)
-/* USB SS warm reset interrupt enable. */
-#define USB_IEN_UWRESIEN	BIT(2)
-/* USB SS hot reset interrupt enable */
-#define USB_IEN_UHRESIEN	BIT(3)
-/* SS link U3 state enter interrupt enable (suspend).*/
-#define USB_IEN_U3ENTIEN	BIT(4)
-/* SS link U3 state exit interrupt enable (wakeup). */
-#define USB_IEN_U3EXTIEN	BIT(5)
-/* SS link U2 state enter interrupt enable.*/
-#define USB_IEN_U2ENTIEN	BIT(6)
-/* SS link U2 state exit interrupt enable.*/
-#define USB_IEN_U2EXTIEN	BIT(7)
-/* SS link U1 state enter interrupt enable.*/
-#define USB_IEN_U1ENTIEN	BIT(8)
-/* SS link U1 state exit interrupt enable.*/
-#define USB_IEN_U1EXTIEN	BIT(9)
-/* ITP/SOF packet detected interrupt enable.*/
-#define USB_IEN_ITPIEN		BIT(10)
-/* Wakeup interrupt enable.*/
-#define USB_IEN_WAKEIEN		BIT(11)
-/* Send Custom Packet interrupt enable.*/
-#define USB_IEN_SPKTIEN		BIT(12)
-/* HS/FS mode connection interrupt enable.*/
-#define USB_IEN_CON2IEN		BIT(16)
-/* HS/FS mode disconnection interrupt enable.*/
-#define USB_IEN_DIS2IEN		BIT(17)
-/* USB reset (HS/FS mode) interrupt enable.*/
-#define USB_IEN_U2RESIEN	BIT(18)
-/* LPM L2 state enter interrupt enable.*/
-#define USB_IEN_L2ENTIEN	BIT(20)
-/* LPM  L2 state exit interrupt enable.*/
-#define USB_IEN_L2EXTIEN	BIT(21)
-/* LPM L1 state enter interrupt enable.*/
-#define USB_IEN_L1ENTIEN	BIT(24)
-/* LPM  L1 state exit interrupt enable.*/
-#define USB_IEN_L1EXTIEN	BIT(25)
-/* Configuration reset interrupt enable.*/
-#define USB_IEN_CFGRESIEN	BIT(26)
-/* Start of the USB SS warm reset interrupt enable.*/
-#define USB_IEN_UWRESSIEN	BIT(28)
-/* End of the USB SS warm reset interrupt enable.*/
-#define USB_IEN_UWRESEIEN	BIT(29)
-
-#define USB_IEN_INIT  (USB_IEN_U2RESIEN | USB_ISTS_DIS2I | USB_IEN_CON2IEN \
-		       | USB_IEN_UHRESIEN | USB_IEN_UWRESIEN | USB_IEN_DISIEN \
-		       | USB_IEN_CONIEN | USB_IEN_U3EXTIEN | USB_IEN_L2ENTIEN \
-		       | USB_IEN_L2EXTIEN | USB_IEN_L1ENTIEN)
-
-/* USB_ISTS - bitmasks */
-/* SS Connection detected. */
-#define USB_ISTS_CONI		BIT(0)
-/* SS Disconnection detected. */
-#define USB_ISTS_DISI		BIT(1)
-/* UUSB warm reset detectede. */
-#define USB_ISTS_UWRESI		BIT(2)
-/* USB hot reset detected. */
-#define USB_ISTS_UHRESI		BIT(3)
-/* U3 link state enter detected (suspend).*/
-#define USB_ISTS_U3ENTI		BIT(4)
-/* U3 link state exit detected (wakeup). */
-#define USB_ISTS_U3EXTI		BIT(5)
-/* U2 link state enter detected.*/
-#define USB_ISTS_U2ENTI		BIT(6)
-/* U2 link state exit detected.*/
-#define USB_ISTS_U2EXTI		BIT(7)
-/* U1 link state enter detected.*/
-#define USB_ISTS_U1ENTI		BIT(8)
-/* U1 link state exit detected.*/
-#define USB_ISTS_U1EXTI		BIT(9)
-/* ITP/SOF packet detected.*/
-#define USB_ISTS_ITPI		BIT(10)
-/* Wakeup detected.*/
-#define USB_ISTS_WAKEI		BIT(11)
-/* Send Custom Packet detected.*/
-#define USB_ISTS_SPKTI		BIT(12)
-/* HS/FS mode connection detected.*/
-#define USB_ISTS_CON2I		BIT(16)
-/* HS/FS mode disconnection detected.*/
-#define USB_ISTS_DIS2I		BIT(17)
-/* USB reset (HS/FS mode) detected.*/
-#define USB_ISTS_U2RESI		BIT(18)
-/* LPM L2 state enter detected.*/
-#define USB_ISTS_L2ENTI		BIT(20)
-/* LPM  L2 state exit detected.*/
-#define USB_ISTS_L2EXTI		BIT(21)
-/* LPM L1 state enter detected.*/
-#define USB_ISTS_L1ENTI		BIT(24)
-/* LPM L1 state exit detected.*/
-#define USB_ISTS_L1EXTI		BIT(25)
-/* USB configuration reset detected.*/
-#define USB_ISTS_CFGRESI	BIT(26)
-/* Start of the USB warm reset detected.*/
-#define USB_ISTS_UWRESSI	BIT(28)
-/* End of the USB warm reset detected.*/
-#define USB_ISTS_UWRESEI	BIT(29)
-
-/* USB_SEL - bitmasks */
-#define EP_SEL_EPNO_MASK	GENMASK(3, 0)
-/* Endpoint number. */
-#define EP_SEL_EPNO(p)		((p) & EP_SEL_EPNO_MASK)
-/* Endpoint direction bit - 0 - OUT, 1 - IN. */
-#define EP_SEL_DIR		BIT(7)
-
-#define select_ep_in(nr)	(EP_SEL_EPNO(p) | EP_SEL_DIR)
-#define select_ep_out		(EP_SEL_EPNO(p))
-
-/* EP_TRADDR - bitmasks */
-/* Transfer Ring address. */
-#define EP_TRADDR_TRADDR(p)	((p))
-
-/* EP_CFG - bitmasks */
-/* Endpoint enable */
-#define EP_CFG_ENABLE		BIT(0)
-/*
- *  Endpoint type.
- * 1 - isochronous
- * 2 - bulk
- * 3 - interrupt
- */
-#define EP_CFG_EPTYPE_MASK	GENMASK(2, 1)
-#define EP_CFG_EPTYPE(p)	(((p) << 1)  & EP_CFG_EPTYPE_MASK)
-/* Stream support enable (only in SS mode). */
-#define EP_CFG_STREAM_EN	BIT(3)
-/* TDL check (only in SS mode for BULK EP). */
-#define EP_CFG_TDL_CHK		BIT(4)
-/* SID check (only in SS mode for BULK OUT EP). */
-#define EP_CFG_SID_CHK		BIT(5)
-/* DMA transfer endianness. */
-#define EP_CFG_EPENDIAN		BIT(7)
-/* Max burst size (used only in SS mode). */
-#define EP_CFG_MAXBURST_MASK	GENMASK(11, 8)
-#define EP_CFG_MAXBURST(p)	(((p) << 8) & EP_CFG_MAXBURST_MASK)
-/* ISO max burst. */
-#define EP_CFG_MULT_MASK	GENMASK(15, 14)
-#define EP_CFG_MULT(p)		(((p) << 14) & EP_CFG_MULT_MASK)
-/* ISO max burst. */
-#define EP_CFG_MAXPKTSIZE_MASK	GENMASK(26, 16)
-#define EP_CFG_MAXPKTSIZE(p)	(((p) << 16) & EP_CFG_MAXPKTSIZE_MASK)
-/* Max number of buffered packets. */
-#define EP_CFG_BUFFERING_MASK	GENMASK(31, 27)
-#define EP_CFG_BUFFERING(p)	(((p) << 27) & EP_CFG_BUFFERING_MASK)
-
-/* EP_CMD - bitmasks */
-/* Endpoint reset. */
-#define EP_CMD_EPRST		BIT(0)
-/* Endpoint STALL set. */
-#define EP_CMD_SSTALL		BIT(1)
-/* Endpoint STALL clear. */
-#define EP_CMD_CSTALL		BIT(2)
-/* Send ERDY TP. */
-#define EP_CMD_ERDY		BIT(3)
-/* Request complete. */
-#define EP_CMD_REQ_CMPL		BIT(5)
-/* Transfer descriptor ready. */
-#define EP_CMD_DRDY		BIT(6)
-/* Data flush. */
-#define EP_CMD_DFLUSH		BIT(7)
-/*
- * Transfer Descriptor Length write  (used only for Bulk Stream capable
- * endpoints in SS mode).
- * Bit Removed from DEV_VER_V3 controller version.
- */
-#define EP_CMD_STDL		BIT(8)
-/*
- * Transfer Descriptor Length (used only in SS mode for bulk endpoints).
- * Bits Removed from DEV_VER_V3 controller version.
- */
-#define EP_CMD_TDL_MASK		GENMASK(15, 9)
-#define EP_CMD_TDL(p)		(((p) << 9) & EP_CMD_TDL_MASK)
-/* ERDY Stream ID value (used in SS mode). */
-#define EP_CMD_ERDY_SID_MASK	GENMASK(31, 16)
-#define EP_CMD_ERDY_SID(p)	(((p) << 16) & EP_CMD_SID_MASK)
-
-/* EP_STS - bitmasks */
-/* Setup transfer complete. */
-#define EP_STS_SETUP		BIT(0)
-/* Endpoint STALL status. */
-#define EP_STS_STALL(p)		((p) & BIT(1))
-/* Interrupt On Complete. */
-#define EP_STS_IOC		BIT(2)
-/* Interrupt on Short Packet. */
-#define EP_STS_ISP		BIT(3)
-/* Transfer descriptor missing. */
-#define EP_STS_DESCMIS		BIT(4)
-/* Stream Rejected (used only in SS mode) */
-#define EP_STS_STREAMR		BIT(5)
-/* EXIT from MOVE DATA State (used only for stream transfers in SS mode). */
-#define EP_STS_MD_EXIT		BIT(6)
-/* TRB error. */
-#define EP_STS_TRBERR		BIT(7)
-/* Not ready (used only in SS mode). */
-#define EP_STS_NRDY		BIT(8)
-/* DMA busy bit. */
-#define EP_STS_DBUSY		BIT(9)
-/* Endpoint Buffer Empty */
-#define EP_STS_BUFFEMPTY(p)	((p) & BIT(10))
-/* Current Cycle Status */
-#define EP_STS_CCS(p)		((p) & BIT(11))
-/* Prime (used only in SS mode. */
-#define EP_STS_PRIME		BIT(12)
-/* Stream error (used only in SS mode). */
-#define EP_STS_SIDERR		BIT(13)
-/* OUT size mismatch. */
-#define EP_STS_OUTSMM		BIT(14)
-/* ISO transmission error. */
-#define EP_STS_ISOERR		BIT(15)
-/* Host Packet Pending (only for SS mode). */
-#define EP_STS_HOSTPP(p)	((p) & BIT(16))
-/* Stream Protocol State Machine State (only for Bulk stream endpoints). */
-#define EP_STS_SPSMST_MASK		GENMASK(18, 17)
-#define EP_STS_SPSMST_DISABLED(p)	(((p) & EP_STS_SPSMST_MASK) >> 17)
-#define EP_STS_SPSMST_IDLE(p)		(((p) & EP_STS_SPSMST_MASK) >> 17)
-#define EP_STS_SPSMST_START_STREAM(p)	(((p) & EP_STS_SPSMST_MASK) >> 17)
-#define EP_STS_SPSMST_MOVE_DATA(p)	(((p) & EP_STS_SPSMST_MASK) >> 17)
-/* Interrupt On Transfer complete. */
-#define EP_STS_IOT		BIT(19)
-/* OUT queue endpoint number. */
-#define EP_STS_OUTQ_NO_MASK	GENMASK(27, 24)
-#define EP_STS_OUTQ_NO(p)	(((p) & EP_STS_OUTQ_NO_MASK) >> 24)
-/* OUT queue valid flag. */
-#define EP_STS_OUTQ_VAL_MASK	BIT(28)
-#define EP_STS_OUTQ_VAL(p)	((p) & EP_STS_OUTQ_VAL_MASK)
-/* SETUP WAIT. */
-#define EP_STS_STPWAIT		BIT(31)
-
-/* EP_STS_SID - bitmasks */
-/* Stream ID (used only in SS mode). */
-#define EP_STS_SID_MASK		GENMASK(15, 0)
-#define EP_STS_SID(p)		((p) & EP_STS_SID_MASK)
-
-/* EP_STS_EN - bitmasks */
-/* SETUP interrupt enable. */
-#define EP_STS_EN_SETUPEN	BIT(0)
-/* OUT transfer missing descriptor enable. */
-#define EP_STS_EN_DESCMISEN	BIT(4)
-/* Stream Rejected enable. */
-#define EP_STS_EN_STREAMREN	BIT(5)
-/* Move Data Exit enable.*/
-#define EP_STS_EN_MD_EXITEN	BIT(6)
-/* TRB enable. */
-#define EP_STS_EN_TRBERREN	BIT(7)
-/* NRDY enable. */
-#define EP_STS_EN_NRDYEN	BIT(8)
-/* Prime enable. */
-#define EP_STS_EN_PRIMEEEN	BIT(12)
-/* Stream error enable. */
-#define EP_STS_EN_SIDERREN	BIT(13)
-/* OUT size mismatch enable. */
-#define EP_STS_EN_OUTSMMEN	BIT(14)
-/* ISO transmission error enable. */
-#define EP_STS_EN_ISOERREN	BIT(15)
-/* Interrupt on Transmission complete enable. */
-#define EP_STS_EN_IOTEN		BIT(19)
-/* Setup Wait interrupt enable. */
-#define EP_STS_EN_STPWAITEN	BIT(31)
-
-/* DRBL- bitmasks */
-#define DB_VALUE_BY_INDEX(index) (1 << (index))
-#define DB_VALUE_EP0_OUT	BIT(0)
-#define DB_VALUE_EP0_IN		BIT(16)
-
-/* EP_IEN - bitmasks */
-#define EP_IEN(index)		(1 << (index))
-#define EP_IEN_EP_OUT0		BIT(0)
-#define EP_IEN_EP_IN0		BIT(16)
-
-/* EP_ISTS - bitmasks */
-#define EP_ISTS(index)		(1 << (index))
-#define EP_ISTS_EP_OUT0		BIT(0)
-#define EP_ISTS_EP_IN0		BIT(16)
-
-/* USB_PWR- bitmasks */
-/*Power Shut Off capability enable*/
-#define PUSB_PWR_PSO_EN		BIT(0)
-/*Power Shut Off capability disable*/
-#define PUSB_PWR_PSO_DS		BIT(1)
-/*
- * Enables turning-off Reference Clock.
- * This bit is optional and implemented only when support for OTG is
- * implemented (indicated by OTG_READY bit set to '1').
- */
-#define PUSB_PWR_STB_CLK_SWITCH_EN	BIT(8)
-/*
- * Status bit indicating that operation required by STB_CLK_SWITCH_EN write
- * is completed
- */
-#define PUSB_PWR_STB_CLK_SWITCH_DONE	BIT(9)
-/* This bit informs if Fast Registers Access is enabled. */
-#define PUSB_PWR_FST_REG_ACCESS_STAT	BIT(30)
-/* Fast Registers Access Enable. */
-#define PUSB_PWR_FST_REG_ACCESS		BIT(31)
-
-/* USB_CONF2- bitmasks */
-/*
- * Writing 1 disables TDL calculation basing on TRB feature in controller
- * for DMULT mode.
- * Bit supported only for DEV_VER_V2 version.
- */
-#define USB_CONF2_DIS_TDL_TRB		BIT(1)
-/*
- * Writing 1 enables TDL calculation basing on TRB feature in controller
- * for DMULT mode.
- * Bit supported only for DEV_VER_V2 version.
- */
-#define USB_CONF2_EN_TDL_TRB		BIT(2)
-
-/* USB_CAP1- bitmasks */
-/*
- * SFR Interface type
- * These field reflects type of SFR interface implemented:
- * 0x0 - OCP
- * 0x1 - AHB,
- * 0x2 - PLB
- * 0x3 - AXI
- * 0x4-0xF - reserved
- */
-#define USB_CAP1_SFR_TYPE_MASK	GENMASK(3, 0)
-#define DEV_SFR_TYPE_OCP(p)	(((p) & USB_CAP1_SFR_TYPE_MASK) == 0x0)
-#define DEV_SFR_TYPE_AHB(p)	(((p) & USB_CAP1_SFR_TYPE_MASK) == 0x1)
-#define DEV_SFR_TYPE_PLB(p)	(((p) & USB_CAP1_SFR_TYPE_MASK) == 0x2)
-#define DEV_SFR_TYPE_AXI(p)	(((p) & USB_CAP1_SFR_TYPE_MASK) == 0x3)
-/*
- * SFR Interface width
- * These field reflects width of SFR interface implemented:
- * 0x0 - 8 bit interface,
- * 0x1 - 16 bit interface,
- * 0x2 - 32 bit interface
- * 0x3 - 64 bit interface
- * 0x4-0xF - reserved
- */
-#define USB_CAP1_SFR_WIDTH_MASK	GENMASK(7, 4)
-#define DEV_SFR_WIDTH_8(p)	(((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x0 << 4))
-#define DEV_SFR_WIDTH_16(p)	(((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x1 << 4))
-#define DEV_SFR_WIDTH_32(p)	(((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x2 << 4))
-#define DEV_SFR_WIDTH_64(p)	(((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x3 << 4))
-/*
- * DMA Interface type
- * These field reflects type of DMA interface implemented:
- * 0x0 - OCP
- * 0x1 - AHB,
- * 0x2 - PLB
- * 0x3 - AXI
- * 0x4-0xF - reserved
- */
-#define USB_CAP1_DMA_TYPE_MASK	GENMASK(11, 8)
-#define DEV_DMA_TYPE_OCP(p)	(((p) & USB_CAP1_DMA_TYPE_MASK) == (0x0 << 8))
-#define DEV_DMA_TYPE_AHB(p)	(((p) & USB_CAP1_DMA_TYPE_MASK) == (0x1 << 8))
-#define DEV_DMA_TYPE_PLB(p)	(((p) & USB_CAP1_DMA_TYPE_MASK) == (0x2 << 8))
-#define DEV_DMA_TYPE_AXI(p)	(((p) & USB_CAP1_DMA_TYPE_MASK) == (0x3 << 8))
-/*
- * DMA Interface width
- * These field reflects width of DMA interface implemented:
- * 0x0 - reserved,
- * 0x1 - reserved,
- * 0x2 - 32 bit interface
- * 0x3 - 64 bit interface
- * 0x4-0xF - reserved
- */
-#define USB_CAP1_DMA_WIDTH_MASK	GENMASK(15, 12)
-#define DEV_DMA_WIDTH_32(p)	(((p) & USB_CAP1_DMA_WIDTH_MASK) == (0x2 << 12))
-#define DEV_DMA_WIDTH_64(p)	(((p) & USB_CAP1_DMA_WIDTH_MASK) == (0x3 << 12))
-/*
- * USB3 PHY Interface type
- * These field reflects type of USB3 PHY interface implemented:
- * 0x0 - USB PIPE,
- * 0x1 - RMMI,
- * 0x2-0xF - reserved
- */
-#define USB_CAP1_U3PHY_TYPE_MASK GENMASK(19, 16)
-#define DEV_U3PHY_PIPE(p) (((p) & USB_CAP1_U3PHY_TYPE_MASK) == (0x0 << 16))
-#define DEV_U3PHY_RMMI(p) (((p) & USB_CAP1_U3PHY_TYPE_MASK) == (0x1 << 16))
-/*
- * USB3 PHY Interface width
- * These field reflects width of USB3 PHY interface implemented:
- * 0x0 - 8 bit PIPE interface,
- * 0x1 - 16 bit PIPE interface,
- * 0x2 - 32 bit PIPE interface,
- * 0x3 - 64 bit PIPE interface
- * 0x4-0xF - reserved
- * Note: When SSIC interface is implemented this field shows the width of
- * internal PIPE interface. The RMMI interface is always 20bit wide.
- */
-#define USB_CAP1_U3PHY_WIDTH_MASK GENMASK(23, 20)
-#define DEV_U3PHY_WIDTH_8(p) \
-	(((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x0 << 20))
-#define DEV_U3PHY_WIDTH_16(p) \
-	(((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x1 << 16))
-#define DEV_U3PHY_WIDTH_32(p) \
-	(((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x2 << 20))
-#define DEV_U3PHY_WIDTH_64(p) \
-	(((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x3 << 16))
-
-/*
- * USB2 PHY Interface enable
- * These field informs if USB2 PHY interface is implemented:
- * 0x0 - interface NOT implemented,
- * 0x1 - interface implemented
- */
-#define USB_CAP1_U2PHY_EN(p)	((p) & BIT(24))
-/*
- * USB2 PHY Interface type
- * These field reflects type of USB2 PHY interface implemented:
- * 0x0 - UTMI,
- * 0x1 - ULPI
- */
-#define DEV_U2PHY_ULPI(p)	((p) & BIT(25))
-/*
- * USB2 PHY Interface width
- * These field reflects width of USB2 PHY interface implemented:
- * 0x0 - 8 bit interface,
- * 0x1 - 16 bit interface,
- * Note: The ULPI interface is always 8bit wide.
- */
-#define DEV_U2PHY_WIDTH_16(p)	((p) & BIT(26))
-/*
- * OTG Ready
- * 0x0 - pure device mode
- * 0x1 - some features and ports for CDNS USB OTG controller are implemented.
- */
-#define USB_CAP1_OTG_READY(p)	((p) & BIT(27))
-
-/*
- * When set, indicates that controller supports automatic internal TDL
- * calculation basing on the size provided in TRB (TRB[22:17]) for DMULT mode
- * Supported only for DEV_VER_V2 controller version.
- */
-#define USB_CAP1_TDL_FROM_TRB(p)	((p) & BIT(28))
-
-/* USB_CAP2- bitmasks */
-/*
- * The actual size of the connected On-chip RAM memory in kB:
- * - 0 means 256 kB (max supported mem size)
- * - value other than 0 reflects the mem size in kB
- */
-#define USB_CAP2_ACTUAL_MEM_SIZE(p) ((p) & GENMASK(7, 0))
-/*
- * Max supported mem size
- * These field reflects width of on-chip RAM address bus width,
- * which determines max supported mem size:
- * 0x0-0x7 - reserved,
- * 0x8 - support for 4kB mem,
- * 0x9 - support for 8kB mem,
- * 0xA - support for 16kB mem,
- * 0xB - support for 32kB mem,
- * 0xC - support for 64kB mem,
- * 0xD - support for 128kB mem,
- * 0xE - support for 256kB mem,
- * 0xF - reserved
- */
-#define USB_CAP2_MAX_MEM_SIZE(p) ((p) & GENMASK(11, 8))
-
-/* USB_CAP3- bitmasks */
-#define EP_IS_IMPLEMENTED(reg, index) ((reg) & (1 << (index)))
-
-/* USB_CAP4- bitmasks */
-#define EP_SUPPORT_ISO(reg, index) ((reg) & (1 << (index)))
-
-/* USB_CAP5- bitmasks */
-#define EP_SUPPORT_STREAM(reg, index) ((reg) & (1 << (index)))
-
-/* USB_CAP6- bitmasks */
-/* The USBSS-DEV Controller  Internal build number. */
-#define GET_DEV_BASE_VERSION(p) ((p) & GENMASK(23, 0))
-/* The USBSS-DEV Controller version number. */
-#define GET_DEV_CUSTOM_VERSION(p) ((p) & GENMASK(31, 24))
-
-#define DEV_VER_NXP_V1		0x00024502
-#define DEV_VER_TI_V1		0x00024509
-#define DEV_VER_V2		0x0002450C
-#define DEV_VER_V3		0x0002450d
-
-/* DBG_LINK1- bitmasks */
-/*
- * LFPS_MIN_DET_U1_EXIT value This parameter configures the minimum
- * time required for decoding the received LFPS as an LFPS.U1_Exit.
- */
-#define DBG_LINK1_LFPS_MIN_DET_U1_EXIT(p)	((p) & GENMASK(7, 0))
-/*
- * LFPS_MIN_GEN_U1_EXIT value This parameter configures the minimum time for
- * phytxelecidle deassertion when LFPS.U1_Exit
- */
-#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_MASK	GENMASK(15, 8)
-#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT(p)	(((p) << 8) & GENMASK(15, 8))
-/*
- * RXDET_BREAK_DIS value This parameter configures terminating the Far-end
- * Receiver termination detection sequence:
- * 0: it is possible that USBSS_DEV will terminate Farend receiver
- *    termination detection sequence
- * 1: USBSS_DEV will not terminate Far-end receiver termination
- *    detection sequence
- */
-#define DBG_LINK1_RXDET_BREAK_DIS		BIT(16)
-/* LFPS_GEN_PING value This parameter configures the LFPS.Ping generation */
-#define DBG_LINK1_LFPS_GEN_PING(p)		(((p) << 17) & GENMASK(21, 17))
-/*
- * Set the LFPS_MIN_DET_U1_EXIT value Writing '1' to this bit writes the
- * LFPS_MIN_DET_U1_EXIT field value to the device. This bit is automatically
- * cleared. Writing '0' has no effect
- */
-#define DBG_LINK1_LFPS_MIN_DET_U1_EXIT_SET	BIT(24)
-/*
- * Set the LFPS_MIN_GEN_U1_EXIT value. Writing '1' to this bit writes the
- * LFPS_MIN_GEN_U1_EXIT field value to the device. This bit is automatically
- * cleared. Writing '0' has no effect
- */
-#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_SET	BIT(25)
-/*
- * Set the RXDET_BREAK_DIS value Writing '1' to this bit writes
- * the RXDET_BREAK_DIS field value to the device. This bit is automatically
- * cleared. Writing '0' has no effect
- */
-#define DBG_LINK1_RXDET_BREAK_DIS_SET		BIT(26)
-/*
- * Set the LFPS_GEN_PING_SET value Writing '1' to this bit writes
- * the LFPS_GEN_PING field value to the device. This bit is automatically
- * cleared. Writing '0' has no effect."
- */
-#define DBG_LINK1_LFPS_GEN_PING_SET		BIT(27)
-
-/* DMA_AXI_CTRL- bitmasks */
-/* The mawprot pin configuration. */
-#define DMA_AXI_CTRL_MARPROT(p) ((p) & GENMASK(2, 0))
-/* The marprot pin configuration. */
-#define DMA_AXI_CTRL_MAWPROT(p) (((p) < 16) & GENMASK(18, 16))
-#define DMA_AXI_CTRL_NON_SECURE 0x02
-
-#define gadget_to_cdns3_device(g) (container_of(g, struct cdns3_device, gadget))
-
-#define ep_to_cdns3_ep(ep) (container_of(ep, struct cdns3_endpoint, endpoint))
-
-/*-------------------------------------------------------------------------*/
-/*
- * USBSS-DEV DMA interface.
- */
-#define TRBS_PER_SEGMENT	40
-
-#define ISO_MAX_INTERVAL	10
-
-#if TRBS_PER_SEGMENT < 2
-#error "Incorrect TRBS_PER_SEGMENT. Minimal Transfer Ring size is 2."
-#endif
-
-/*
- *Only for ISOC endpoints - maximum number of TRBs is calculated as
- * pow(2, bInterval-1) * number of usb requests. It is limitation made by
- * driver to save memory. Controller must prepare TRB for each ITP even
- * if bInterval > 1. It's the reason why driver needs so many TRBs for
- * isochronous endpoints.
- */
-#define TRBS_PER_ISOC_SEGMENT	(ISO_MAX_INTERVAL * 8)
-
-#define GET_TRBS_PER_SEGMENT(ep_type) ((ep_type) == USB_ENDPOINT_XFER_ISOC ? \
-				      TRBS_PER_ISOC_SEGMENT : TRBS_PER_SEGMENT)
-/**
- * struct cdns3_trb - represent Transfer Descriptor block.
- * @buffer:	pointer to buffer data
- * @length:	length of data
- * @control:	control flags.
- *
- * This structure describes transfer block serviced by DMA module.
- */
-struct cdns3_trb {
-	__le32 buffer;
-	__le32 length;
-	__le32 control;
-};
-
-#define TRB_SIZE		(sizeof(struct cdns3_trb))
-#define TRB_RING_SIZE		(TRB_SIZE * TRBS_PER_SEGMENT)
-#define TRB_ISO_RING_SIZE	(TRB_SIZE * TRBS_PER_ISOC_SEGMENT)
-#define TRB_CTRL_RING_SIZE	(TRB_SIZE * 2)
-
-/* TRB bit mask */
-#define TRB_TYPE_BITMASK	GENMASK(15, 10)
-#define TRB_TYPE(p)		((p) << 10)
-#define TRB_FIELD_TO_TYPE(p)	(((p) & TRB_TYPE_BITMASK) >> 10)
-
-/* TRB type IDs */
-/* bulk, interrupt, isoc , and control data stage */
-#define TRB_NORMAL		1
-/* TRB for linking ring segments */
-#define TRB_LINK		6
-
-/* Cycle bit - indicates TRB ownership by driver or hw*/
-#define TRB_CYCLE		BIT(0)
-/*
- * When set to '1', the device will toggle its interpretation of the Cycle bit
- */
-#define TRB_TOGGLE		BIT(1)
-
-/*
- * Short Packet (SP). OUT EPs at DMULT=1 only. Indicates if the TRB was
- * processed while USB short packet was received. No more buffers defined by
- * the TD will be used. DMA will automatically advance to next TD.
- * - Shall be set to 0 by Software when putting TRB on the Transfer Ring
- * - Shall be set to 1 by Controller when Short Packet condition for this TRB
- *   is detected independent if ISP is set or not.
- */
-#define TRB_SP			BIT(1)
-
-/* Interrupt on short packet*/
-#define TRB_ISP			BIT(2)
-/*Setting this bit enables FIFO DMA operation mode*/
-#define TRB_FIFO_MODE		BIT(3)
-/* Set PCIe no snoop attribute */
-#define TRB_CHAIN		BIT(4)
-/* Interrupt on completion */
-#define TRB_IOC			BIT(5)
-
-/* stream ID bitmasks. */
-#define TRB_STREAM_ID(p)	((p) & GENMASK(31, 16))
-
-/* Size of TD expressed in USB packets for HS/FS mode. */
-#define TRB_TDL_HS_SIZE(p)	(((p) << 16) & GENMASK(31, 16))
-#define TRB_TDL_HS_SIZE_GET(p)	(((p) & GENMASK(31, 16)) >> 16)
-
-/* transfer_len bitmasks. */
-#define TRB_LEN(p)		((p) & GENMASK(16, 0))
-
-/* Size of TD expressed in USB packets for SS mode. */
-#define TRB_TDL_SS_SIZE(p)	(((p) << 17) & GENMASK(23, 17))
-#define TRB_TDL_SS_SIZE_GET(p)	(((p) & GENMASK(23, 17)) >> 17)
-
-/* transfer_len bitmasks - bits 31:24 */
-#define TRB_BURST_LEN(p)	(((p) << 24) & GENMASK(31, 24))
-#define TRB_BURST_LEN_GET(p)	(((p) & GENMASK(31, 24)) >> 24)
-
-/* Data buffer pointer bitmasks*/
-#define TRB_BUFFER(p)		((p) & GENMASK(31, 0))
-
-/*-------------------------------------------------------------------------*/
-/* Driver numeric constants */
-
-/* Such declaration should be added to ch9.h */
-#define USB_DEVICE_MAX_ADDRESS		127
-
-/* Endpoint init values */
-#define CDNS3_EP_MAX_PACKET_LIMIT	1024
-#define CDNS3_EP_MAX_STREAMS		15
-#define CDNS3_EP0_MAX_PACKET_LIMIT	512
-
-/* All endpoints including EP0 */
-#define CDNS3_ENDPOINTS_MAX_COUNT	32
-#define CDNS3_EP_ZLP_BUF_SIZE		1024
-
-#define CDNS3_EP_BUF_SIZE		2	/* KB */
-#define CDNS3_EP_ISO_HS_MULT		3
-#define CDNS3_EP_ISO_SS_BURST		3
-#define CDNS3_MAX_NUM_DESCMISS_BUF	32
-#define CDNS3_DESCMIS_BUF_SIZE		2048	/* Bytes */
-/*-------------------------------------------------------------------------*/
-/* Used structs */
-
-struct cdns3_device;
-
-/**
- * struct cdns3_endpoint - extended device side representation of USB endpoint.
- * @endpoint: usb endpoint
- * @pending_req_list: list of requests queuing on transfer ring.
- * @deferred_req_list: list of requests waiting for queuing on transfer ring.
- * @trb_pool: transfer ring - array of transaction buffers
- * @trb_pool_dma: dma address of transfer ring
- * @cdns3_dev: device associated with this endpoint
- * @name: a human readable name e.g. ep1out
- * @flags: specify the current state of endpoint
- * @dir: endpoint direction
- * @num: endpoint number (1 - 15)
- * @type: set to bmAttributes & USB_ENDPOINT_XFERTYPE_MASK
- * @interval: interval between packets used for ISOC endpoint.
- * @free_trbs: number of free TRBs in transfer ring
- * @num_trbs: number of all TRBs in transfer ring
- * @pcs: producer cycle state
- * @ccs: consumer cycle state
- * @enqueue: enqueue index in transfer ring
- * @dequeue: dequeue index in transfer ring
- * @trb_burst_size: number of burst used in trb.
- */
-struct cdns3_endpoint {
-	struct usb_ep		endpoint;
-	struct list_head	pending_req_list;
-	struct list_head	deferred_req_list;
-
-	struct cdns3_trb	*trb_pool;
-	dma_addr_t		trb_pool_dma;
-
-	struct cdns3_device	*cdns3_dev;
-	char			name[20];
-
-#define EP_ENABLED		BIT(0)
-#define EP_STALL		BIT(1)
-#define EP_WEDGE		BIT(2)
-#define EP_TRANSFER_STARTED	BIT(3)
-#define EP_UPDATE_EP_TRBADDR	BIT(4)
-#define EP_PENDING_REQUEST	BIT(5)
-#define EP_RING_FULL		BIT(6)
-#define EP_CLAIMED		BIT(7)
-#define EP_DEFERRED_DRDY	BIT(8)
-#define EP_QUIRK_ISO_OUT_EN	BIT(9)
-	u32			flags;
-
-	u8			dir;
-	u8			num;
-	u8			type;
-	int			interval;
-
-	int			free_trbs;
-	int			num_trbs;
-	u8			pcs;
-	u8			ccs;
-	int			enqueue;
-	int			dequeue;
-	u8			trb_burst_size;
-
-	unsigned int		wa1_set:1;
-	struct cdns3_trb	*wa1_trb;
-	unsigned int		wa1_trb_index;
-	unsigned int		wa1_cycle_bit:1;
-};
-
-/**
- * struct cdns3_aligned_buf - represent aligned buffer used for DMA transfer
- * @buf: aligned to 8 bytes data buffer. Buffer address used in
- *       TRB shall be aligned to 8.
- * @dma: dma address
- * @size: size of buffer
- * @in_use: inform if this buffer is associated with usb_request
- * @list: used to adding instance of this object to list
- */
-struct cdns3_aligned_buf {
-	void			*buf;
-	dma_addr_t		dma;
-	u32			size;
-	int			in_use:1;
-	struct list_head	list;
-};
-
-/**
- * struct cdns3_request - extended device side representation of usb_request
- *                        object .
- * @request: generic usb_request object describing single I/O request.
- * @priv_ep: extended representation of usb_ep object
- * @trb: the first TRB association with this request
- * @start_trb: number of the first TRB in transfer ring
- * @end_trb: number of the last TRB in transfer ring
- * @aligned_buf: object holds information about aligned buffer associated whit
- *               this endpoint
- * @flags: flag specifying special usage of request
- */
-struct cdns3_request {
-	struct usb_request		request;
-	struct cdns3_endpoint		*priv_ep;
-	struct cdns3_trb		*trb;
-	int				start_trb;
-	int				end_trb;
-	struct cdns3_aligned_buf	*aligned_buf;
-#define REQUEST_PENDING			BIT(0)
-#define REQUEST_INTERNAL		BIT(1)
-#define REQUEST_INTERNAL_CH		BIT(2)
-#define REQUEST_ZLP			BIT(3)
-#define REQUEST_UNALIGNED		BIT(4)
-	u32				flags;
-	struct list_head		list;
-};
-
-#define to_cdns3_request(r) (container_of(r, struct cdns3_request, request))
-
-/*Stages used during enumeration process.*/
-#define CDNS3_SETUP_STAGE		0x0
-#define CDNS3_DATA_STAGE		0x1
-#define CDNS3_STATUS_STAGE		0x2
-
-/**
- * struct cdns3_device - represent USB device.
- * @dev: pointer to device structure associated whit this controller
- * @sysdev: pointer to the DMA capable device
- * @gadget: device side representation of the peripheral controller
- * @gadget_driver: pointer to the gadget driver
- * @dev_ver: device controller version.
- * @lock: for synchronizing
- * @regs: base address for device side registers
- * @setup_buf: used while processing usb control requests
- * @setup_dma: dma address for setup_buf
- * @zlp_buf - zlp buffer
- * @ep0_stage: ep0 stage during enumeration process.
- * @ep0_data_dir: direction for control transfer
- * @eps: array of pointers to all endpoints with exclusion ep0
- * @aligned_buf_list: list of aligned buffers internally allocated by driver
- * @run_garbage_colector: infroms that at least one element of aligned_buf_list
- *                        can be freed
- * @selected_ep: actually selected endpoint. It's used only to improve
- *               performance.
- * @isoch_delay: value from Set Isoch Delay request. Only valid on SS/SSP.
- * @u1_allowed: allow device transition to u1 state
- * @u2_allowed: allow device transition to u2 state
- * @is_selfpowered: device is self powered
- * @setup_pending: setup packet is processing by gadget driver
- * @hw_configured_flag: hardware endpoint configuration was set.
- * @wake_up_flag: allow device to remote up the host
- * @status_completion_no_call: indicate that driver is waiting for status s
- *     stage completion. It's used in deferred SET_CONFIGURATION request.
- * @onchip_buffers: number of available on-chip buffers.
- * @onchip_used_size: actual size of on-chip memory assigned to endpoints.
- * @pending_status_wq: workqueue handling status stage for deferred requests.
- * @shadow_ep_en: hold information about endpoints that will be enabled
- *     in soft irq.
- * @pending_status_request: request for which status stage was deferred
- */
-struct cdns3_device {
-	struct device			*dev;
-	struct device			*sysdev;
-
-	struct usb_gadget		gadget;
-	struct usb_gadget_driver	*gadget_driver;
-
-#define CDNS_REVISION_V0		0x00024501
-#define CDNS_REVISION_V1		0x00024509
-	u32				dev_ver;
-
-	/* generic spin-lock for drivers */
-	spinlock_t			lock;
-
-	struct cdns3_usb_regs		__iomem *regs;
-
-	struct usb_ctrlrequest		*setup_buf;
-	dma_addr_t			setup_dma;
-	void				*zlp_buf;
-
-	u8				ep0_stage;
-	int				ep0_data_dir;
-
-	struct cdns3_endpoint		*eps[CDNS3_ENDPOINTS_MAX_COUNT];
-
-	struct list_head		aligned_buf_list;
-	unsigned			run_garbage_colector:1;
-
-	u32				selected_ep;
-	u16				isoch_delay;
-
-	unsigned			wait_for_setup:1;
-	unsigned			u1_allowed:1;
-	unsigned			u2_allowed:1;
-	unsigned			is_selfpowered:1;
-	unsigned			setup_pending:1;
-	int				hw_configured_flag:1;
-	int				wake_up_flag:1;
-	unsigned			status_completion_no_call:1;
-	int				out_mem_is_allocated;
-
-	struct work_struct		pending_status_wq;
-	struct usb_request		*pending_status_request;
-	u32				shadow_ep_en;
-	/*in KB */
-	u16				onchip_buffers;
-	u16				onchip_used_size;
-};
-
-void cdns3_set_register_bit(void __iomem *ptr, u32 mask);
-dma_addr_t cdns3_trb_virt_to_dma(struct cdns3_endpoint *priv_ep,
-				 struct cdns3_trb *trb);
-enum usb_device_speed cdns3_get_speed(struct cdns3_device *priv_dev);
-void cdns3_pending_setup_status_handler(struct work_struct *work);
-void cdns3_hw_reset_eps_config(struct cdns3_device *priv_dev);
-void cdns3_set_hw_configuration(struct cdns3_device *priv_dev);
-void cdns3_select_ep(struct cdns3_device *priv_dev, u32 ep);
-void cdns3_allow_enable_l1(struct cdns3_device *priv_dev, int enable);
-struct usb_request *cdns3_next_request(struct list_head *list);
-int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
-			  struct usb_request *request);
-void cdns3_rearm_transfer(struct cdns3_endpoint *priv_ep, u8 rearm);
-int cdns3_allocate_trb_pool(struct cdns3_endpoint *priv_ep);
-u8 cdns3_ep_addr_to_index(u8 ep_addr);
-int cdns3_gadget_ep_set_wedge(struct usb_ep *ep);
-int cdns3_gadget_ep_set_halt(struct usb_ep *ep, int value);
-struct usb_request *cdns3_gadget_ep_alloc_request(struct usb_ep *ep,
-						  gfp_t gfp_flags);
-void cdns3_gadget_ep_free_request(struct usb_ep *ep,
-				  struct usb_request *request);
-int cdns3_gadget_ep_dequeue(struct usb_ep *ep, struct usb_request *request);
-void cdns3_gadget_giveback(struct cdns3_endpoint *priv_ep,
-			   struct cdns3_request *priv_req,
-			   int status);
-
-int cdns3_init_ep0(struct cdns3_device *priv_dev,
-		   struct cdns3_endpoint *priv_ep);
-void cdns3_ep0_config(struct cdns3_device *priv_dev);
-void cdns3_ep_config(struct cdns3_endpoint *priv_ep);
-void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir);
-int __cdns3_gadget_wakeup(struct cdns3_device *priv_dev);
-
-#endif /* __LINUX_CDNS3_GADGET */

drivers/usb/cdns3/host-export.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Cadence USBSS DRD Driver - Host Export APIs
- *
- * Copyright (C) 2017-2018 NXP
- *
- * Authors: Peter Chen <[e-mail]>
- */
-#ifndef __LINUX_CDNS3_HOST_EXPORT
-#define __LINUX_CDNS3_HOST_EXPORT
-
-#ifdef CONFIG_USB_CDNS3_HOST
-
-int cdns3_host_init(struct cdns3 *cdns);
-void cdns3_host_exit(struct cdns3 *cdns);
-
-#else
-
-static inline int cdns3_host_init(struct cdns3 *cdns)
-{
-	return -ENXIO;
-}
-
-static inline void cdns3_host_exit(struct cdns3 *cdns) { }
-
-#endif /* CONFIG_USB_CDNS3_HOST */
-
-#endif /* __LINUX_CDNS3_HOST_EXPORT */

drivers/usb/cdns3/host.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Cadence USBSS DRD Driver - host side
- *
- * Copyright (C) 2018 Cadence Design Systems.
- * Copyright (C) 2017-2018 NXP
- *
- * Authors: Peter Chen <[e-mail]>
- *          Pawel Laszczak <[e-mail]>
- */
-
-#include <linux/platform_device.h>
-#include "core.h"
-#include "drd.h"
-
-static int __cdns3_host_init(struct cdns3 *cdns)
-{
-	struct platform_device *xhci;
-	int ret;
-
-	cdns3_drd_switch_host(cdns, 1);
-
-	xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
-	if (!xhci) {
-		dev_err(cdns->dev, "couldn't allocate xHCI device\n");
-		return -ENOMEM;
-	}
-
-	xhci->dev.parent = cdns->dev;
-	cdns->host_dev = xhci;
-
-	ret = platform_device_add_resources(xhci, cdns->xhci_res,
-					    CDNS3_XHCI_RESOURCES_NUM);
-	if (ret) {
-		dev_err(cdns->dev, "couldn't add resources to xHCI device\n");
-		goto err1;
-	}
-
-	ret = platform_device_add(xhci);
-	if (ret) {
-		dev_err(cdns->dev, "failed to register xHCI device\n");
-		goto err1;
-	}
-
-	return 0;
-err1:
-	platform_device_put(xhci);
-	return ret;
-}
-
-static void cdns3_host_exit(struct cdns3 *cdns)
-{
-	platform_device_unregister(cdns->host_dev);
-	cdns->host_dev = NULL;
-	cdns3_drd_switch_host(cdns, 0);
-}
-
-int cdns3_host_init(struct cdns3 *cdns)
-{
-	struct cdns3_role_driver *rdrv;
-
-	rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
-	if (!rdrv)
-		return -ENOMEM;
-
-	rdrv->start	= __cdns3_host_init;
-	rdrv->stop	= cdns3_host_exit;
-	rdrv->state	= CDNS3_ROLE_STATE_INACTIVE;
-	rdrv->suspend	= NULL;
-	rdrv->resume	= NULL;
-	rdrv->name	= "host";
-
-	cdns->roles[CDNS3_ROLE_HOST] = rdrv;
-
-	return 0;
-}

drivers/usb/cdns3/trace.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * USBSS device controller driver Trace Support
- *
- * Copyright (C) 2018 Cadence.
- *
- * Author: Pawel Laszczak <[e-mail]>
- */
-
-#define CREATE_TRACE_POINTS
-#include "trace.h"
-
-void cdns3_dbg(struct cdns3_device *priv_dev, const char *fmt, ...)
-{
-	struct va_format vaf;
-	va_list args;
-
-	va_start(args, fmt);
-	vaf.fmt = fmt;
-	vaf.va = &args;
-	trace_cdns3_log(priv_dev, &vaf);
-	va_end(args);
-}

drivers/usb/cdns3/trace.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * USBSS device controller driver.
- * Trace support header file.
- *
- * Copyright (C) 2018 Cadence.
- *
- * Author: Pawel Laszczak <[e-mail]>
- */
-
-#undef TRACE_SYSTEM
-#define TRACE_SYSTEM cdns3
-
-#if !defined(__LINUX_CDNS3_TRACE) || defined(TRACE_HEADER_MULTI_READ)
-#define __LINUX_CDNS3_TRACE
-
-#include <linux/types.h>
-#include <linux/tracepoint.h>
-#include <asm/byteorder.h>
-#include <linux/usb/ch9.h>
-#include "core.h"
-#include "gadget.h"
-#include "debug.h"
-
-#define CDNS3_MSG_MAX	500
-
-TRACE_EVENT(cdns3_log,
-	TP_PROTO(struct cdns3_device *priv_dev, struct va_format *vaf),
-	TP_ARGS(priv_dev, vaf),
-	TP_STRUCT__entry(
-		__string(name, dev_name(priv_dev->dev))
-		__dynamic_array(char, msg, CDNS3_MSG_MAX)
-	),
-	TP_fast_assign(
-		__assign_str(name, dev_name(priv_dev->dev));
-		vsnprintf(__get_str(msg), CDNS3_MSG_MAX, vaf->fmt, *vaf->va);
-	),
-	TP_printk("%s: %s", __get_str(name), __get_str(msg))
-);
-
-DECLARE_EVENT_CLASS(cdns3_log_doorbell,
-	TP_PROTO(const char *ep_name, u32 ep_trbaddr),
-	TP_ARGS(ep_name, ep_trbaddr),
-	TP_STRUCT__entry(
-		__string(name, ep_name)
-		__field(u32, ep_trbaddr)
-	),
-	TP_fast_assign(
-		__assign_str(name, ep_name);
-		__entry->ep_trbaddr = ep_trbaddr;
-	),
-	TP_printk("//Ding Dong %s, ep_trbaddr %08x", __get_str(name),
-		  __entry->ep_trbaddr)
-);
-
-DEFINE_EVENT(cdns3_log_doorbell, cdns3_doorbell_ep0,
-	TP_PROTO(const char *ep_name, u32 ep_trbaddr),
-	TP_ARGS(ep_name, ep_trbaddr)
-);
-
-DEFINE_EVENT(cdns3_log_doorbell, cdns3_doorbell_epx,
-	TP_PROTO(const char *ep_name, u32 ep_trbaddr),
-	TP_ARGS(ep_name, ep_trbaddr)
-);
-
-DECLARE_EVENT_CLASS(cdns3_log_usb_irq,
-	TP_PROTO(struct cdns3_device *priv_dev, u32 usb_ists),
-	TP_ARGS(priv_dev, usb_ists),
-	TP_STRUCT__entry(
-		__field(enum usb_device_speed, speed)
-		__field(u32, usb_ists)
-		__dynamic_array(char, str, CDNS3_MSG_MAX)
-	),
-	TP_fast_assign(
-		__entry->speed = cdns3_get_speed(priv_dev);
-		__entry->usb_ists = usb_ists;
-	),
-	TP_printk("%s", cdns3_decode_usb_irq(__get_str(str), __entry->speed,
-					     __entry->usb_ists))
-);
-
-DEFINE_EVENT(cdns3_log_usb_irq, cdns3_usb_irq,
-	TP_PROTO(struct cdns3_device *priv_dev, u32 usb_ists),
-	TP_ARGS(priv_dev, usb_ists)
-);
-
-DECLARE_EVENT_CLASS(cdns3_log_epx_irq,
-	TP_PROTO(struct cdns3_device *priv_dev, struct cdns3_endpoint *priv_ep),
-	TP_ARGS(priv_dev, priv_ep),
-	TP_STRUCT__entry(
-		__string(ep_name, priv_ep->name)
-		__field(u32, ep_sts)
-		__field(u32, ep_traddr)
-		__dynamic_array(char, str, CDNS3_MSG_MAX)
-	),
-	TP_fast_assign(
-		__assign_str(ep_name, priv_ep->name);
-		__entry->ep_sts = readl(&priv_dev->regs->ep_sts);
-		__entry->ep_traddr = readl(&priv_dev->regs->ep_traddr);
-	),
-	TP_printk("%s, ep_traddr: %08x",
-		  cdns3_decode_epx_irq(__get_str(str),
-				       __get_str(ep_name),
-				       __entry->ep_sts),
-		  __entry->ep_traddr)
-);
-
-DEFINE_EVENT(cdns3_log_epx_irq, cdns3_epx_irq,
-	TP_PROTO(struct cdns3_device *priv_dev, struct cdns3_endpoint *priv_ep),
-	TP_ARGS(priv_dev, priv_ep)
-);
-
-DECLARE_EVENT_CLASS(cdns3_log_ep0_irq,
-	TP_PROTO(struct cdns3_device *priv_dev,  u32 ep_sts),
-	TP_ARGS(priv_dev, ep_sts),
-	TP_STRUCT__entry(
-		__field(int, ep_dir)
-		__field(u32, ep_sts)
-		__dynamic_array(char, str, CDNS3_MSG_MAX)
-	),
-	TP_fast_assign(
-		__entry->ep_dir = priv_dev->ep0_data_dir;
-		__entry->ep_sts = ep_sts;
-	),
-	TP_printk("%s", cdns3_decode_ep0_irq(__get_str(str),
-					     __entry->ep_dir,
-					     __entry->ep_sts))
-);
-
-DEFINE_EVENT(cdns3_log_ep0_irq, cdns3_ep0_irq,
-	TP_PROTO(struct cdns3_device *priv_dev, u32 ep_sts),
-	TP_ARGS(priv_dev, ep_sts)
-);
-
-DECLARE_EVENT_CLASS(cdns3_log_ctrl,
-	TP_PROTO(struct usb_ctrlrequest *ctrl),
-	TP_ARGS(ctrl),
-	TP_STRUCT__entry(
-		__field(u8, bRequestType)
-		__field(u8, bRequest)
-		__field(u16, wValue)
-		__field(u16, wIndex)
-		__field(u16, wLength)
-		__dynamic_array(char, str, CDNS3_MSG_MAX)
-	),
-	TP_fast_assign(
-		__entry->bRequestType = ctrl->bRequestType;
-		__entry->bRequest = ctrl->bRequest;
-		__entry->wValue = le16_to_cpu(ctrl->wValue);
-		__entry->wIndex = le16_to_cpu(ctrl->wIndex);
-		__entry->wLength = le16_to_cpu(ctrl->wLength);
-	),
-	TP_printk("%s", usb_decode_ctrl(__get_str(str), CDNS3_MSG_MAX,
-					__entry->bRequestType,
-					__entry->bRequest, __entry->wValue,
-					__entry->wIndex, __entry->wLength)
-	)
-);
-
-DEFINE_EVENT(cdns3_log_ctrl, cdns3_ctrl_req,
-	TP_PROTO(struct usb_ctrlrequest *ctrl),
-	TP_ARGS(ctrl)
-);
-
-DECLARE_EVENT_CLASS(cdns3_log_request,
-	TP_PROTO(struct cdns3_request *req),
-	TP_ARGS(req),
-	TP_STRUCT__entry(
-		__string(name, req->priv_ep->name)
-		__field(struct cdns3_request *, req)
-		__field(void *, buf)
-		__field(unsigned int, actual)
-		__field(unsigned int, length)
-		__field(int, status)
-		__field(int, zero)
-		__field(int, short_not_ok)
-		__field(int, no_interrupt)
-		__field(int, start_trb)
-		__field(int, end_trb)
-		__field(struct cdns3_trb *, start_trb_addr)
-		__field(int, flags)
-	),
-	TP_fast_assign(
-		__assign_str(name, req->priv_ep->name);
-		__entry->req = req;
-		__entry->buf = req->request.buf;
-		__entry->actual = req->request.actual;
-		__entry->length = req->request.length;
-		__entry->status = req->request.status;
-		__entry->zero = req->request.zero;
-		__entry->short_not_ok = req->request.short_not_ok;
-		__entry->no_interrupt = req->request.no_interrupt;
-		__entry->start_trb = req->start_trb;
-		__entry->end_trb = req->end_trb;
-		__entry->start_trb_addr = req->trb;
-		__entry->flags = req->flags;
-	),
-	TP_printk("%s: req: %p, req buff %p, length: %u/%u %s%s%s, status: %d,"
-		  " trb: [start:%d, end:%d: virt addr %pa], flags:%x ",
-		__get_str(name), __entry->req, __entry->buf, __entry->actual,
-		__entry->length,
-		__entry->zero ? "zero | " : "",
-		__entry->short_not_ok ? "short | " : "",
-		__entry->no_interrupt ? "no int" : "",
-		__entry->status,
-		__entry->start_trb,
-		__entry->end_trb,
-		__entry->start_trb_addr,
-		__entry->flags
-	)
-);
-
-DEFINE_EVENT(cdns3_log_request, cdns3_alloc_request,
-	TP_PROTO(struct cdns3_request *req),
-	TP_ARGS(req)
-);
-
-DEFINE_EVENT(cdns3_log_request, cdns3_free_request,
-	TP_PROTO(struct cdns3_request *req),
-	TP_ARGS(req)
-);
-
-DEFINE_EVENT(cdns3_log_request, cdns3_ep_queue,
-	TP_PROTO(struct cdns3_request *req),
-	TP_ARGS(req)
-);
-
-DEFINE_EVENT(cdns3_log_request, cdns3_ep_dequeue,
-	TP_PROTO(struct cdns3_request *req),
-	TP_ARGS(req)
-);
-
-DEFINE_EVENT(cdns3_log_request, cdns3_gadget_giveback,
-	TP_PROTO(struct cdns3_request *req),
-	TP_ARGS(req)
-);
-
-DECLARE_EVENT_CLASS(cdns3_log_aligned_request,
-	TP_PROTO(struct cdns3_request *priv_req),
-	TP_ARGS(priv_req),
-	TP_STRUCT__entry(
-		__string(name, priv_req->priv_ep->name)
-		__field(struct usb_request *, req)
-		__field(void *, buf)
-		__field(dma_addr_t, dma)
-		__field(void *, aligned_buf)
-		__field(dma_addr_t, aligned_dma)
-		__field(u32, aligned_buf_size)
-	),
-	TP_fast_assign(
-		__assign_str(name, priv_req->priv_ep->name);
-		__entry->req = &priv_req->request;
-		__entry->buf = priv_req->request.buf;
-		__entry->dma = priv_req->request.dma;
-		__entry->aligned_buf = priv_req->aligned_buf->buf;
-		__entry->aligned_dma = priv_req->aligned_buf->dma;
-		__entry->aligned_buf_size = priv_req->aligned_buf->size;
-	),
-	TP_printk("%s: req: %p, req buf %p, dma %pad a_buf %p a_dma %pad, size %d",
-		__get_str(name), __entry->req, __entry->buf, &__entry->dma,
-		__entry->aligned_buf, &__entry->aligned_dma,
-		__entry->aligned_buf_size
-	)
-);
-
-DEFINE_EVENT(cdns3_log_aligned_request, cdns3_free_aligned_request,
-	TP_PROTO(struct cdns3_request *req),
-	TP_ARGS(req)
-);
-
-DEFINE_EVENT(cdns3_log_aligned_request, cdns3_prepare_aligned_request,
-	TP_PROTO(struct cdns3_request *req),
-	TP_ARGS(req)
-);
-
-DECLARE_EVENT_CLASS(cdns3_log_trb,
-	TP_PROTO(struct cdns3_endpoint *priv_ep, struct cdns3_trb *trb),
-	TP_ARGS(priv_ep, trb),
-	TP_STRUCT__entry(
-		__string(name, priv_ep->name)
-		__field(struct cdns3_trb *, trb)
-		__field(u32, buffer)
-		__field(u32, length)
-		__field(u32, control)
-		__field(u32, type)
-	),
-	TP_fast_assign(
-		__assign_str(name, priv_ep->name);
-		__entry->trb = trb;
-		__entry->buffer = trb->buffer;
-		__entry->length = trb->length;
-		__entry->control = trb->control;
-		__entry->type = usb_endpoint_type(priv_ep->endpoint.desc);
-	),
-	TP_printk("%s: trb %p, dma buf: 0x%08x, size: %ld, burst: %d ctrl: 0x%08x (%s%s%s%s%s%s%s)",
-		__get_str(name), __entry->trb, __entry->buffer,
-		TRB_LEN(__entry->length),
-		(u8)TRB_BURST_LEN_GET(__entry->length),
-		__entry->control,
-		__entry->control & TRB_CYCLE ? "C=1, " : "C=0, ",
-		__entry->control & TRB_TOGGLE ? "T=1, " : "T=0, ",
-		__entry->control & TRB_ISP ? "ISP, " : "",
-		__entry->control & TRB_FIFO_MODE ? "FIFO, " : "",
-		__entry->control & TRB_CHAIN ? "CHAIN, " : "",
-		__entry->control & TRB_IOC ? "IOC, " : "",
-		TRB_FIELD_TO_TYPE(__entry->control) == TRB_NORMAL ? "Normal" : "LINK"
-	)
-);
-
-DEFINE_EVENT(cdns3_log_trb, cdns3_prepare_trb,
-	TP_PROTO(struct cdns3_endpoint *priv_ep, struct cdns3_trb *trb),
-	TP_ARGS(priv_ep, trb)
-);
-
-DEFINE_EVENT(cdns3_log_trb, cdns3_complete_trb,
-	TP_PROTO(struct cdns3_endpoint *priv_ep, struct cdns3_trb *trb),
-	TP_ARGS(priv_ep, trb)
-);
-
-DECLARE_EVENT_CLASS(cdns3_log_ring,
-	TP_PROTO(struct cdns3_endpoint *priv_ep),
-	TP_ARGS(priv_ep),
-	TP_STRUCT__entry(
-		__dynamic_array(u8, ring, TRB_RING_SIZE)
-		__dynamic_array(u8, priv_ep, sizeof(struct cdns3_endpoint))
-		__dynamic_array(char, buffer,
-				(TRBS_PER_SEGMENT * 65) + CDNS3_MSG_MAX)
-	),
-	TP_fast_assign(
-		memcpy(__get_dynamic_array(priv_ep), priv_ep,
-		       sizeof(struct cdns3_endpoint));
-		memcpy(__get_dynamic_array(ring), priv_ep->trb_pool,
-		       TRB_RING_SIZE);
-	),
-
-	TP_printk("%s",
-		  cdns3_dbg_ring((struct cdns3_endpoint *)__get_str(priv_ep),
-				 (struct cdns3_trb *)__get_str(ring),
-				 __get_str(buffer)))
-);
-
-DEFINE_EVENT(cdns3_log_ring, cdns3_ring,
-	TP_PROTO(struct cdns3_endpoint *priv_ep),
-	TP_ARGS(priv_ep)
-);
-
-DECLARE_EVENT_CLASS(cdns3_log_ep,
-	TP_PROTO(struct cdns3_endpoint *priv_ep),
-	TP_ARGS(priv_ep),
-	TP_STRUCT__entry(
-		__string(name, priv_ep->name)
-		__field(unsigned int, maxpacket)
-		__field(unsigned int, maxpacket_limit)
-		__field(unsigned int, max_streams)
-		__field(unsigned int, maxburst)
-		__field(unsigned int, flags)
-		__field(unsigned int, dir)
-		__field(u8, enqueue)
-		__field(u8, dequeue)
-	),
-	TP_fast_assign(
-		__assign_str(name, priv_ep->name);
-		__entry->maxpacket = priv_ep->endpoint.maxpacket;
-		__entry->maxpacket_limit = priv_ep->endpoint.maxpacket_limit;
-		__entry->max_streams = priv_ep->endpoint.max_streams;
-		__entry->maxburst = priv_ep->endpoint.maxburst;
-		__entry->flags = priv_ep->flags;
-		__entry->dir = priv_ep->dir;
-		__entry->enqueue = priv_ep->enqueue;
-		__entry->dequeue = priv_ep->dequeue;
-	),
-	TP_printk("%s: mps: %d/%d. streams: %d, burst: %d, enq idx: %d, "
-		  "deq idx: %d, flags %s%s%s%s%s%s%s%s, dir: %s",
-		__get_str(name), __entry->maxpacket,
-		__entry->maxpacket_limit, __entry->max_streams,
-		__entry->maxburst, __entry->enqueue,
-		__entry->dequeue,
-		__entry->flags & EP_ENABLED ? "EN | " : "",
-		__entry->flags & EP_STALL ? "STALL | " : "",
-		__entry->flags & EP_WEDGE ? "WEDGE | " : "",
-		__entry->flags & EP_TRANSFER_STARTED ? "STARTED | " : "",
-		__entry->flags & EP_UPDATE_EP_TRBADDR ? "UPD TRB | " : "",
-		__entry->flags & EP_PENDING_REQUEST ? "REQ PEN | " : "",
-		__entry->flags & EP_RING_FULL ? "RING FULL |" : "",
-		__entry->flags & EP_CLAIMED ?  "CLAIMED " : "",
-		__entry->dir ? "IN" : "OUT"
-	)
-);
-
-DEFINE_EVENT(cdns3_log_ep, cdns3_gadget_ep_enable,
-	TP_PROTO(struct cdns3_endpoint *priv_ep),
-	TP_ARGS(priv_ep)
-);
-
-DEFINE_EVENT(cdns3_log_ep, cdns3_gadget_ep_disable,
-	TP_PROTO(struct cdns3_endpoint *priv_ep),
-	TP_ARGS(priv_ep)
-);
-
-DECLARE_EVENT_CLASS(cdns3_log_request_handled,
-	TP_PROTO(struct cdns3_request *priv_req, int current_index,
-		 int handled),
-	TP_ARGS(priv_req, current_index, handled),
-	TP_STRUCT__entry(
-		__field(struct cdns3_request *, priv_req)
-		__field(unsigned int, dma_position)
-		__field(unsigned int, handled)
-		__field(unsigned int, dequeue_idx)
-		__field(unsigned int, enqueue_idx)
-		__field(unsigned int, start_trb)
-		__field(unsigned int, end_trb)
-	),
-	TP_fast_assign(
-		__entry->priv_req = priv_req;
-		__entry->dma_position = current_index;
-		__entry->handled = handled;
-		__entry->dequeue_idx = priv_req->priv_ep->dequeue;
-		__entry->enqueue_idx = priv_req->priv_ep->enqueue;
-		__entry->start_trb = priv_req->start_trb;
-		__entry->end_trb = priv_req->end_trb;
-	),
-	TP_printk("Req: %p %s, DMA pos: %d, ep deq: %d, ep enq: %d,"
-		  " start trb: %d, end trb: %d",
-		__entry->priv_req,
-		__entry->handled ? "handled" : "not handled",
-		__entry->dma_position, __entry->dequeue_idx,
-		__entry->enqueue_idx, __entry->start_trb,
-		__entry->end_trb
-	)
-);
-
-DEFINE_EVENT(cdns3_log_request_handled, cdns3_request_handled,
-	TP_PROTO(struct cdns3_request *priv_req, int current_index,
-		 int handled),
-	TP_ARGS(priv_req, current_index, handled)
-);
-#endif /* __LINUX_CDNS3_TRACE */
-
-/* this part must be outside header guard */
-
-#undef TRACE_INCLUDE_PATH
-#define TRACE_INCLUDE_PATH .
-
-#undef TRACE_INCLUDE_FILE
-#define TRACE_INCLUDE_FILE trace
-
-#include <trace/define_trace.h>