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 17 static int __cdns3_host_init(struct cdns3 *cdns) 18 { 19 struct platform_device *xhci; 20 int ret; 21 22 cdns3_drd_switch_host(cdns, 1); 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; 47 err1: 48 platform_device_put(xhci); 49 return ret; 50 } 51 52 static void cdns3_host_exit(struct cdns3 *cdns) 53 { 54 platform_device_unregister(cdns->host_dev); 55 cdns->host_dev = NULL; 56 cdns3_drd_switch_host(cdns, 0); 57 } 58 59 int 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