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 16 static int __cdns3_host_init(struct cdns3 *cdns) 17 { 18 struct platform_device *xhci; 19 int ret; 20 21 cdns3_drd_switch_host(cdns, 1); 22 23 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); 24 if (!xhci) { 25 dev_err(cdns->dev, "couldn't allocate xHCI device\n"); 26 return -ENOMEM; 27 } 28 29 xhci->dev.parent = cdns->dev; 30 cdns->host_dev = xhci; 31 32 ret = platform_device_add_resources(xhci, cdns->xhci_res, 33 CDNS3_XHCI_RESOURCES_NUM); 34 if (ret) { 35 dev_err(cdns->dev, "couldn't add resources to xHCI device\n"); 36 goto err1; 37 } 38 39 ret = platform_device_add(xhci); 40 if (ret) { 41 dev_err(cdns->dev, "failed to register xHCI device\n"); 42 goto err1; 43 } 44 45 return 0; 46 err1: 47 platform_device_put(xhci); 48 return ret; 49 } 50 51 static void cdns3_host_exit(struct cdns3 *cdns) 52 { 53 platform_device_unregister(cdns->host_dev); 54 cdns->host_dev = NULL; 55 cdns3_drd_switch_host(cdns, 0); 56 } 57 58 int cdns3_host_init(struct cdns3 *cdns) 59 { 60 struct cdns3_role_driver *rdrv; 61 62 rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL); 63 if (!rdrv) 64 return -ENOMEM; 65 66 rdrv->start = __cdns3_host_init; 67 rdrv->stop = cdns3_host_exit; 68 rdrv->state = CDNS3_ROLE_STATE_INACTIVE; 69 rdrv->name = "host"; 70 71 cdns->roles[USB_ROLE_HOST] = rdrv; 72 73 return 0; 74 } 75