1 files changed, 0 insertions, 543 deletions

diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c
deleted file mode 100644
index ddc73f1c87c5..000000000000
--- a/drivers/usb/cdns3/core.c
+++ /dev/null
@@ -1,543 +0,0 @@
-// 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 <peter.chen@nxp.com>
- *         Pawel Laszczak <pawell@cadence.com>
- *         Roger Quadros <rogerq@ti.com>
- */
-
-#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 <pawell@cadence.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("Cadence USB3 DRD Controller Driver");