drivers/usb/host/ehci-uniphier.c

   1 /*
   2  * Copyright (C) 2014 Panasonic Corporation
   3  *   Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <linux/err.h>
  10 #include <usb.h>
  11 #include <asm/arch/ehci-uniphier.h>
  12 #include "ehci.h"
  13
  14 #ifdef CONFIG_OF_CONTROL
  15 #include <fdtdec.h>
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 #define FDT             gd->fdt_blob
  19 #define COMPAT          "panasonic,uniphier-ehci"
  20
  21 static int get_uniphier_ehci_base(int index, struct ehci_hccr **base)
  22 {
  23         int offset;
  24
  25         for (offset = fdt_node_offset_by_compatible(FDT, 0, COMPAT);
  26              offset >= 0;
  27              offset = fdt_node_offset_by_compatible(FDT, offset, COMPAT)) {
  28                 if (index == 0) {
  29                         *base = (struct ehci_hccr *)
  30                                         fdtdec_get_addr(FDT, offset, "reg");
  31                         return 0;
  32                 }
  33                 index--;
  34         }
  35
  36         return -ENODEV; /* not found */
  37 }
  38 #else
  39 static int get_uniphier_ehci_base(int index, struct ehci_hccr **base)
  40 {
  41         *base = (struct ehci_hccr *)uniphier_ehci_platdata[index].base;
  42         return 0;
  43 }
  44 #endif
  45
  46 /*
  47  * Create the appropriate control structures to manage
  48  * a new EHCI host controller.
  49  */
  50 int ehci_hcd_init(int index, enum usb_init_type init, struct ehci_hccr **hccr,
  51                   struct ehci_hcor **hcor)
  52 {
  53         int ret;
  54         struct ehci_hccr *cr;
  55         struct ehci_hcor *or;
  56
  57         uniphier_ehci_reset(index, 0);
  58
  59         ret = get_uniphier_ehci_base(index, &cr);
  60         if (ret < 0)
  61                 return ret;
  62         or = (void *)cr + HC_LENGTH(ehci_readl(&cr->cr_capbase));
  63
  64         *hccr = cr;
  65         *hcor = or;
  66
  67         return 0;
  68 }
  69
  70 int ehci_hcd_stop(int index)
  71 {
  72         uniphier_ehci_reset(index, 1);
  73
  74         return 0;
  75 }