drivers/core/fdtaddr.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Device addresses
   4  *
   5  * Copyright (c) 2017 Google, Inc
   6  *
   7  * (C) Copyright 2012
   8  * Pavel Herrmann <morpheus.ibis@gmail.com>
   9  */
  10
  11 #include <common.h>
  12 #include <dm.h>
  13 #include <fdt_support.h>
  14 #include <asm/io.h>
  15 #include <dm/device-internal.h>
  16
  17 DECLARE_GLOBAL_DATA_PTR;
  18
  19 fdt_addr_t devfdt_get_addr_index(struct udevice *dev, int index)
  20 {
  21 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
  22         fdt_addr_t addr;
  23
  24         if (CONFIG_IS_ENABLED(OF_TRANSLATE)) {
  25                 const fdt32_t *reg;
  26                 int len = 0;
  27                 int na, ns;
  28
  29                 na = fdt_address_cells(gd->fdt_blob,
  30                                        dev_of_offset(dev->parent));
  31                 if (na < 1) {
  32                         debug("bad #address-cells\n");
  33                         return FDT_ADDR_T_NONE;
  34                 }
  35
  36                 ns = fdt_size_cells(gd->fdt_blob, dev_of_offset(dev->parent));
  37                 if (ns < 0) {
  38                         debug("bad #size-cells\n");
  39                         return FDT_ADDR_T_NONE;
  40                 }
  41
  42                 reg = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "reg",
  43                                   &len);
  44                 if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns)))) {
  45                         debug("Req index out of range\n");
  46                         return FDT_ADDR_T_NONE;
  47                 }
  48
  49                 reg += index * (na + ns);
  50
  51                 if (ns) {
  52                         /*
  53                          * Use the full-fledged translate function for complex
  54                          * bus setups.
  55                          */
  56                         addr = fdt_translate_address((void *)gd->fdt_blob,
  57                                                      dev_of_offset(dev), reg);
  58                 } else {
  59                         /* Non translatable if #size-cells == 0 */
  60                         addr = fdt_read_number(reg, na);
  61                 }
  62         } else {
  63                 /*
  64                  * Use the "simple" translate function for less complex
  65                  * bus setups.
  66                  */
  67                 addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob,
  68                                 dev_of_offset(dev->parent), dev_of_offset(dev),
  69                                 "reg", index, NULL, false);
  70                 if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) {
  71                         if (device_get_uclass_id(dev->parent) ==
  72                             UCLASS_SIMPLE_BUS)
  73                                 addr = simple_bus_translate(dev->parent, addr);
  74                 }
  75         }
  76
  77 #if defined(CONFIG_TRANSLATION_OFFSET)
  78         /*
  79          * Some platforms need a special address translation. Those
  80          * platforms (e.g. mvebu in SPL) can configure a translation
  81          * offset by setting this value in the GD and enaling this
  82          * feature via CONFIG_TRANSLATION_OFFSET. This value will
  83          * get added to all addresses returned by devfdt_get_addr().
  84          */
  85         addr += gd->translation_offset;
  86 #endif
  87
  88         return addr;
  89 #else
  90         return FDT_ADDR_T_NONE;
  91 #endif
  92 }
  93
  94 fdt_addr_t devfdt_get_addr_size_index(struct udevice *dev, int index,
  95                                    fdt_size_t *size)
  96 {
  97 #if CONFIG_IS_ENABLED(OF_CONTROL)
  98         /*
  99          * Only get the size in this first call. We'll get the addr in the
 100          * next call to the exisiting dev_get_xxx function which handles
 101          * all config options.
 102          */
 103         fdtdec_get_addr_size_auto_noparent(gd->fdt_blob, dev_of_offset(dev),
 104                                            "reg", index, size, false);
 105
 106         /*
 107          * Get the base address via the existing function which handles
 108          * all Kconfig cases
 109          */
 110         return devfdt_get_addr_index(dev, index);
 111 #else
 112         return FDT_ADDR_T_NONE;
 113 #endif
 114 }
 115
 116 fdt_addr_t devfdt_get_addr_name(struct udevice *dev, const char *name)
 117 {
 118 #if CONFIG_IS_ENABLED(OF_CONTROL)
 119         int index;
 120
 121         index = fdt_stringlist_search(gd->fdt_blob, dev_of_offset(dev),
 122                                       "reg-names", name);
 123         if (index < 0)
 124                 return index;
 125
 126         return devfdt_get_addr_index(dev, index);
 127 #else
 128         return FDT_ADDR_T_NONE;
 129 #endif
 130 }
 131
 132 fdt_addr_t devfdt_get_addr(struct udevice *dev)
 133 {
 134         return devfdt_get_addr_index(dev, 0);
 135 }
 136
 137 void *devfdt_get_addr_ptr(struct udevice *dev)
 138 {
 139         return (void *)(uintptr_t)devfdt_get_addr_index(dev, 0);
 140 }
 141
 142 void *devfdt_remap_addr_index(struct udevice *dev, int index)
 143 {
 144         fdt_addr_t addr = devfdt_get_addr_index(dev, index);
 145
 146         if (addr == FDT_ADDR_T_NONE)
 147                 return NULL;
 148
 149         return map_physmem(addr, 0, MAP_NOCACHE);
 150 }
 151
 152 void *devfdt_remap_addr_name(struct udevice *dev, const char *name)
 153 {
 154         fdt_addr_t addr = devfdt_get_addr_name(dev, name);
 155
 156         if (addr == FDT_ADDR_T_NONE)
 157                 return NULL;
 158
 159         return map_physmem(addr, 0, MAP_NOCACHE);
 160 }
 161
 162 void *devfdt_remap_addr(struct udevice *dev)
 163 {
 164         return devfdt_remap_addr_index(dev, 0);
 165 }
 166
 167 void *devfdt_map_physmem(struct udevice *dev, unsigned long size)
 168 {
 169         fdt_addr_t addr = devfdt_get_addr(dev);
 170
 171         if (addr == FDT_ADDR_T_NONE)
 172                 return NULL;
 173
 174         return map_physmem(addr, size, MAP_NOCACHE);
 175 }