// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/*
 * pci.c - DesignWare HS OTG Controller PCI driver
 *
 * Copyright (C) 2004-2013 Synopsys, Inc.
 */

/*
 * Provides the initialization and cleanup entry points for the DWC_otg PCI
 * driver
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/usb.h>

#include <linux/usb/hcd.h>
#include <linux/usb/ch11.h>
#include <linux/platform_device.h>
#include <linux/usb/usb_phy_generic.h>

#include "core.h"

static const char dwc2_driver_name[] = "dwc2-pci";

struct dwc2_pci_glue {
        struct platform_device *dwc2;
        struct platform_device *phy;
};

/**
 * dwc2_pci_remove() - Provides the cleanup entry points for the DWC_otg PCI
 * driver
 *
 * @pci: The programming view of DWC_otg PCI
 */
static void dwc2_pci_remove(struct pci_dev *pci)
{
        struct dwc2_pci_glue *glue = pci_get_drvdata(pci);

        platform_device_unregister(glue->dwc2);
        usb_phy_generic_unregister(glue->phy);
        pci_set_drvdata(pci, NULL);
}

static int dwc2_pci_probe(struct pci_dev *pci,
                          const struct pci_device_id *id)
{
        struct resource         res[2];
        struct platform_device  *dwc2;
        struct platform_device  *phy;
        int                     ret;
        struct device           *dev = &pci->dev;
        struct dwc2_pci_glue    *glue;

        ret = pcim_enable_device(pci);
        if (ret) {
                dev_err(dev, "failed to enable pci device\n");
                return -ENODEV;
        }

        pci_set_master(pci);

        phy = usb_phy_generic_register();
        if (IS_ERR(phy)) {
                dev_err(dev, "error registering generic PHY (%ld)\n",
                        PTR_ERR(phy));
                return PTR_ERR(phy);
        }

        dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
        if (!dwc2) {
                dev_err(dev, "couldn't allocate dwc2 device\n");
                ret = -ENOMEM;
                goto err;
        }

        memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));

        res[0].start    = pci_resource_start(pci, 0);
        res[0].end      = pci_resource_end(pci, 0);
        res[0].name     = "dwc2";
        res[0].flags    = IORESOURCE_MEM;

        res[1].start    = pci->irq;
        res[1].name     = "dwc2";
        res[1].flags    = IORESOURCE_IRQ;

        ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res));
        if (ret) {
                dev_err(dev, "couldn't add resources to dwc2 device\n");
                goto err;
        }

        dwc2->dev.parent = dev;

        glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
        if (!glue) {
                ret = -ENOMEM;
                goto err;
        }

        ret = platform_device_add(dwc2);
        if (ret) {
                dev_err(dev, "failed to register dwc2 device\n");
                goto err;
        }

        glue->phy = phy;
        glue->dwc2 = dwc2;
        pci_set_drvdata(pci, glue);

        return 0;
err:
        usb_phy_generic_unregister(phy);
        platform_device_put(dwc2);
        return ret;
}

static struct pci_driver dwc2_pci_driver = {
        .name = dwc2_driver_name,
        .id_table = dwc2_pci_ids,
        .probe = dwc2_pci_probe,
        .remove = dwc2_pci_remove,
};

module_pci_driver(dwc2_pci_driver);

MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
MODULE_AUTHOR("Synopsys, Inc.");
MODULE_LICENSE("Dual BSD/GPL");