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}