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 <log.h>
  15 #include <asm/io.h>
  16 #include <dm/device-internal.h>
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 fdt_addr_t devfdt_get_addr_index(const struct udevice *dev, int index)
  21 {
  22 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
  23         fdt_addr_t addr;
  24
  25         if (CONFIG_IS_ENABLED(OF_TRANSLATE)) {
  26                 const fdt32_t *reg;
  27                 int len = 0;
  28                 int na, ns;
  29
  30                 na = fdt_address_cells(gd->fdt_blob,
  31                                        dev_of_offset(dev->parent));
  32                 if (na < 1) {
  33                         debug("bad #address-cells\n");
  34                         return FDT_ADDR_T_NONE;
  35                 }
  36
  37                 ns = fdt_size_cells(gd->fdt_blob, dev_of_offset(dev->parent));
  38                 if (ns < 0) {
  39                         debug("bad #size-cells\n");
  40                         return FDT_ADDR_T_NONE;
  41                 }
  42
  43                 reg = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "reg",
  44                                   &len);
  45                 if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns)))) {
  46                         debug("Req index out of range\n");
  47                         return FDT_ADDR_T_NONE;
  48                 }
  49
  50                 reg += index * (na + ns);
  51
  52                 if (ns) {
  53                         /*
  54                          * Use the full-fledged translate function for complex
  55                          * bus setups.
  56                          */
  57                         addr = fdt_translate_address((void *)gd->fdt_blob,
  58                                                      dev_of_offset(dev), reg);
  59                 } else {
  60                         /* Non translatable if #size-cells == 0 */
  61                         addr = fdt_read_number(reg, na);
  62                 }
  63         } else {
  64                 /*
  65                  * Use the "simple" translate function for less complex
  66                  * bus setups.
  67                  */
  68                 addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob,
  69                                 dev_of_offset(dev->parent), dev_of_offset(dev),
  70                                 "reg", index, NULL, false);
  71                 if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) {
  72                         if (device_get_uclass_id(dev->parent) ==
  73                             UCLASS_SIMPLE_BUS)
  74                                 addr = simple_bus_translate(dev->parent, addr);
  75                 }
  76         }
  77
  78 #if defined(CONFIG_TRANSLATION_OFFSET)
  79         /*
  80          * Some platforms need a special address translation. Those
  81          * platforms (e.g. mvebu in SPL) can configure a translation
  82          * offset by setting this value in the GD and enaling this
  83          * feature via CONFIG_TRANSLATION_OFFSET. This value will
  84          * get added to all addresses returned by devfdt_get_addr().
  85          */
  86         addr += gd->translation_offset;
  87 #endif
  88
  89         return addr;
  90 #else
  91         return FDT_ADDR_T_NONE;
  92 #endif
  93 }
  94
  95 fdt_addr_t devfdt_get_addr_size_index(const struct udevice *dev, int index,
  96                                       fdt_size_t *size)
  97 {
  98 #if CONFIG_IS_ENABLED(OF_CONTROL)
  99         /*
 100          * Only get the size in this first call. We'll get the addr in the
 101          * next call to the exisiting dev_get_xxx function which handles
 102          * all config options.
 103          */
 104         fdtdec_get_addr_size_auto_noparent(gd->fdt_blob, dev_of_offset(dev),
 105                                            "reg", index, size, false);
 106
 107         /*
 108          * Get the base address via the existing function which handles
 109          * all Kconfig cases
 110          */
 111         return devfdt_get_addr_index(dev, index);
 112 #else
 113         return FDT_ADDR_T_NONE;
 114 #endif
 115 }
 116
 117 fdt_addr_t devfdt_get_addr_name(const struct udevice *dev, const char *name)
 118 {
 119 #if CONFIG_IS_ENABLED(OF_CONTROL)
 120         int index;
 121
 122         index = fdt_stringlist_search(gd->fdt_blob, dev_of_offset(dev),
 123                                       "reg-names", name);
 124         if (index < 0)
 125                 return index;
 126
 127         return devfdt_get_addr_index(dev, index);
 128 #else
 129         return FDT_ADDR_T_NONE;
 130 #endif
 131 }
 132
 133 fdt_addr_t devfdt_get_addr_size_name(const struct udevice *dev,
 134                                      const char *name, fdt_size_t *size)
 135 {
 136 #if CONFIG_IS_ENABLED(OF_CONTROL)
 137         int index;
 138
 139         index = fdt_stringlist_search(gd->fdt_blob, dev_of_offset(dev),
 140                                       "reg-names", name);
 141         if (index < 0)
 142                 return index;
 143
 144         return devfdt_get_addr_size_index(dev, index, size);
 145 #else
 146         return FDT_ADDR_T_NONE;
 147 #endif
 148 }
 149
 150 fdt_addr_t devfdt_get_addr(const struct udevice *dev)
 151 {
 152         return devfdt_get_addr_index(dev, 0);
 153 }
 154
 155 void *devfdt_get_addr_ptr(const struct udevice *dev)
 156 {
 157         fdt_addr_t addr = devfdt_get_addr_index(dev, 0);
 158
 159         return (addr == FDT_ADDR_T_NONE) ? NULL : (void *)(uintptr_t)addr;
 160 }
 161
 162 void *devfdt_remap_addr_index(const struct udevice *dev, int index)
 163 {
 164         fdt_addr_t addr = devfdt_get_addr_index(dev, index);
 165
 166         if (addr == FDT_ADDR_T_NONE)
 167                 return NULL;
 168
 169         return map_physmem(addr, 0, MAP_NOCACHE);
 170 }
 171
 172 void *devfdt_remap_addr_name(const struct udevice *dev, const char *name)
 173 {
 174         fdt_addr_t addr = devfdt_get_addr_name(dev, name);
 175
 176         if (addr == FDT_ADDR_T_NONE)
 177                 return NULL;
 178
 179         return map_physmem(addr, 0, MAP_NOCACHE);
 180 }
 181
 182 void *devfdt_remap_addr(const struct udevice *dev)
 183 {
 184         return devfdt_remap_addr_index(dev, 0);
 185 }
 186
 187 void *devfdt_map_physmem(const struct udevice *dev, unsigned long size)
 188 {
 189         fdt_addr_t addr = devfdt_get_addr(dev);
 190
 191         if (addr == FDT_ADDR_T_NONE)
 192                 return NULL;
 193
 194         return map_physmem(addr, size, MAP_NOCACHE);
 195 }
 196
 197 fdt_addr_t devfdt_get_addr_pci(const struct udevice *dev)
 198 {
 199         ulong addr;
 200
 201         addr = devfdt_get_addr(dev);
 202         if (CONFIG_IS_ENABLED(PCI) && IS_ENABLED(CONFIG_DM_PCI) &&
 203             addr == FDT_ADDR_T_NONE) {
 204                 struct fdt_pci_addr pci_addr;
 205                 u32 bar;
 206                 int ret;
 207
 208                 ret = ofnode_read_pci_addr(dev_ofnode(dev), FDT_PCI_SPACE_MEM32,
 209                                            "reg", &pci_addr);
 210                 if (ret) {
 211                         /* try if there is any i/o-mapped register */
 212                         ret = ofnode_read_pci_addr(dev_ofnode(dev),
 213                                                    FDT_PCI_SPACE_IO, "reg",
 214                                                    &pci_addr);
 215                         if (ret)
 216                                 return FDT_ADDR_T_NONE;
 217                 }
 218                 ret = fdtdec_get_pci_bar32(dev, &pci_addr, &bar);
 219                 if (ret)
 220                         return FDT_ADDR_T_NONE;
 221                 addr = bar;
 222         }
 223
 224         return addr;
 225 }