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#include <dm.h>
12#include <dm/devres.h>
13#include <linux/compat.h>
14#include <usb.h>
15#include <usb/xhci.h>
16
17#include "core.h"
18#include "drd.h"
19
20static int __cdns3_host_init(struct cdns3 *cdns)
21{
22	struct xhci_hcor *hcor;
23	struct xhci_hccr *hccr;
24
25	cdns3_drd_switch_host(cdns, 1);
26
27	hccr = (struct xhci_hccr *)cdns->xhci_regs;
28	hcor = (struct xhci_hcor *)(cdns->xhci_regs +
29			HC_LENGTH(xhci_readl(&(hccr)->cr_capbase)));
30
31	return xhci_register(cdns->dev, hccr, hcor);
32}
33
34static void cdns3_host_exit(struct cdns3 *cdns)
35{
36	xhci_deregister(cdns->dev);
37	cdns3_drd_switch_host(cdns, 0);
38}
39
40int cdns3_host_init(struct cdns3 *cdns)
41{
42	struct cdns3_role_driver *rdrv;
43
44	rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
45	if (!rdrv)
46		return -ENOMEM;
47
48	rdrv->start	= __cdns3_host_init;
49	rdrv->stop	= cdns3_host_exit;
50	rdrv->state	= CDNS3_ROLE_STATE_INACTIVE;
51	rdrv->name	= "host";
52
53	cdns->roles[USB_ROLE_HOST] = rdrv;
54
55	return 0;
56}
57