// SPDX-License-Identifier: GPL-2.0 /* * Cadence USBSS DRD Driver - host side * * Copyright (C) 2018-2019 Cadence Design Systems. * Copyright (C) 2017-2018 NXP * * Authors: Peter Chen <peter.chen@nxp.com> * Pawel Laszczak <pawell@cadence.com> */ #include <linux/platform_device.h> #include "core.h" #include "drd.h" #include "host-export.h" #include <linux/usb/hcd.h> static int __cdns3_host_init(struct cdns3 *cdns) { struct platform_device *xhci; int ret; struct usb_hcd *hcd; cdns3_drd_host_on(cdns); 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; } /* Glue needs to access xHCI region register for Power management */ hcd = platform_get_drvdata(xhci); if (hcd) cdns->xhci_regs = hcd->regs; 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_host_off(cdns); } 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->name = "host"; cdns->roles[USB_ROLE_HOST] = rdrv; return 0; }