drivers/usb/cdns3/host.c

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