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 
__cdns3_host_init(struct cdns3 * cdns)20 static 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 
cdns3_host_exit(struct cdns3 * cdns)34 static void cdns3_host_exit(struct cdns3 *cdns)
35 {
36 	xhci_deregister(cdns->dev);
37 	cdns3_drd_switch_host(cdns, 0);
38 }
39 
cdns3_host_init(struct cdns3 * cdns)40 int 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