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 <clk.h>
   9 #include <dm.h>
  10 #include "ehci.h"
  11
  12 /*
  13  * Even though here we don't explicitly use "struct ehci_ctrl"
  14  * ehci_register() expects it to be the first thing that resides in
  15  * device's private data.
  16  */
  17 struct generic_ehci {
  18         struct ehci_ctrl ctrl;
  19 };
  20
  21 static int ehci_usb_probe(struct udevice *dev)
  22 {
  23         struct ehci_hccr *hccr = (struct ehci_hccr *)dev_get_addr(dev);
  24         struct ehci_hcor *hcor;
  25         int i;
  26
  27         for (i = 0; ; i++) {
  28                 struct udevice *clk_dev;
  29                 int clk_id;
  30
  31                 clk_id = clk_get_by_index(dev, i, &clk_dev);
  32                 if (clk_id < 0)
  33                         break;
  34                 if (clk_enable(clk_dev, clk_id))
  35                         printf("failed to enable clock (dev=%s, id=%d)\n",
  36                                clk_dev->name, clk_id);
  37         }
  38
  39         hcor = (struct ehci_hcor *)((uintptr_t)hccr +
  40                                     HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  41
  42         return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
  43 }
  44
  45 static int ehci_usb_remove(struct udevice *dev)
  46 {
  47         return ehci_deregister(dev);
  48 }
  49
  50 static const struct udevice_id ehci_usb_ids[] = {
  51         { .compatible = "generic-ehci" },
  52         { }
  53 };
  54
  55 U_BOOT_DRIVER(ehci_generic) = {
  56         .name   = "ehci_generic",
  57         .id     = UCLASS_USB,
  58         .of_match = ehci_usb_ids,
  59         .probe = ehci_usb_probe,
  60         .remove = ehci_usb_remove,
  61         .ops    = &ehci_usb_ops,
  62         .priv_auto_alloc_size = sizeof(struct generic_ehci),
  63         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
  64 };