LXR linux/drivers/usb/cdns3/host.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Cadence USBSS DRD Driver - host side
   4 *
   5 * Copyright (C) 2018-2019 Cadence Design Systems.
   6 * Copyright (C) 2017-2018 NXP
   7 *
   8 * Authors: Peter Chen <peter.chen@nxp.com>
   9 *          Pawel Laszczak <pawell@cadence.com>
  10 */
  11
  12#include <linux/platform_device.h>
  13#include "core.h"
  14#include "drd.h"
  15#include "host-export.h"
  16
  17static int __cdns3_host_init(struct cdns3 *cdns)
  18{
  19        struct platform_device *xhci;
  20        int ret;
  21
  22        cdns3_drd_host_on(cdns);
  23
  24        xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
  25        if (!xhci) {
  26                dev_err(cdns->dev, "couldn't allocate xHCI device\n");
  27                return -ENOMEM;
  28        }
  29
  30        xhci->dev.parent = cdns->dev;
  31        cdns->host_dev = xhci;
  32
  33        ret = platform_device_add_resources(xhci, cdns->xhci_res,
  34                                            CDNS3_XHCI_RESOURCES_NUM);
  35        if (ret) {
  36                dev_err(cdns->dev, "couldn't add resources to xHCI device\n");
  37                goto err1;
  38        }
  39
  40        ret = platform_device_add(xhci);
  41        if (ret) {
  42                dev_err(cdns->dev, "failed to register xHCI device\n");
  43                goto err1;
  44        }
  45
  46        return 0;
  47err1:
  48        platform_device_put(xhci);
  49        return ret;
  50}
  51
  52static void cdns3_host_exit(struct cdns3 *cdns)
  53{
  54        platform_device_unregister(cdns->host_dev);
  55        cdns->host_dev = NULL;
  56        cdns3_drd_host_off(cdns);
  57}
  58
  59int cdns3_host_init(struct cdns3 *cdns)
  60{
  61        struct cdns3_role_driver *rdrv;
  62
  63        rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
  64        if (!rdrv)
  65                return -ENOMEM;
  66
  67        rdrv->start     = __cdns3_host_init;
  68        rdrv->stop      = cdns3_host_exit;
  69        rdrv->state     = CDNS3_ROLE_STATE_INACTIVE;
  70        rdrv->name      = "host";
  71
  72        cdns->roles[USB_ROLE_HOST] = rdrv;
  73
  74        return 0;
  75}
  76