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