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