drivers/usb/host/ehci-generic.c

   1 /*
   2  * Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include "ehci.h"
  10
  11 /*
  12  * Even though here we don't explicitly use "struct ehci_ctrl"
  13  * ehci_register() expects it to be the first thing that resides in
  14  * device's private data.
  15  */
  16 struct generic_ehci {
  17         struct ehci_ctrl ctrl;
  18 };
  19
  20 static int ehci_usb_probe(struct udevice *dev)
  21 {
  22         struct ehci_hccr *hccr = (struct ehci_hccr *)dev_get_addr(dev);
  23         struct ehci_hcor *hcor;
  24
  25         hcor = (struct ehci_hcor *)((uintptr_t)hccr +
  26                                     HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  27
  28         return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
  29 }
  30
  31 static int ehci_usb_remove(struct udevice *dev)
  32 {
  33         return ehci_deregister(dev);
  34 }
  35
  36 static const struct udevice_id ehci_usb_ids[] = {
  37         { .compatible = "generic-ehci" },
  38         { }
  39 };
  40
  41 U_BOOT_DRIVER(ehci_generic) = {
  42         .name   = "ehci_generic",
  43         .id     = UCLASS_USB,
  44         .of_match = ehci_usb_ids,
  45         .probe = ehci_usb_probe,
  46         .remove = ehci_usb_remove,
  47         .ops    = &ehci_usb_ops,
  48         .priv_auto_alloc_size = sizeof(struct generic_ehci),
  49         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
  50 };