mirror of
https://xff.cz/git/u-boot/
synced 2025-10-31 10:26:10 +01:00
1e6ca1a6ad
Add an implementation of this function which mirrors the functions of the automatic device-tree implementation. This can be used with of-platdata to create regmaps. Signed-off-by: Simon Glass <sjg@chromium.org>
120 lines
2.3 KiB
C
120 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 2015 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <libfdt.h>
|
|
#include <malloc.h>
|
|
#include <mapmem.h>
|
|
#include <regmap.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static struct regmap *regmap_alloc_count(int count)
|
|
{
|
|
struct regmap *map;
|
|
|
|
map = malloc(sizeof(struct regmap));
|
|
if (!map)
|
|
return NULL;
|
|
if (count <= 1) {
|
|
map->range = &map->base_range;
|
|
} else {
|
|
map->range = malloc(count * sizeof(struct regmap_range));
|
|
if (!map->range) {
|
|
free(map);
|
|
return NULL;
|
|
}
|
|
}
|
|
map->range_count = count;
|
|
|
|
return map;
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(OF_PLATDATA)
|
|
int regmap_init_mem_platdata(struct udevice *dev, u32 *reg, int count,
|
|
struct regmap **mapp)
|
|
{
|
|
struct regmap_range *range;
|
|
struct regmap *map;
|
|
|
|
map = regmap_alloc_count(count);
|
|
if (!map)
|
|
return -ENOMEM;
|
|
|
|
map->base = *reg;
|
|
for (range = map->range; count > 0; reg += 2, range++, count--) {
|
|
range->start = *reg;
|
|
range->size = reg[1];
|
|
}
|
|
|
|
*mapp = map;
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
int regmap_init_mem(struct udevice *dev, struct regmap **mapp)
|
|
{
|
|
const void *blob = gd->fdt_blob;
|
|
struct regmap_range *range;
|
|
const fdt32_t *cell;
|
|
struct regmap *map;
|
|
int count;
|
|
int addr_len, size_len, both_len;
|
|
int parent;
|
|
int len;
|
|
|
|
parent = dev->parent->of_offset;
|
|
addr_len = fdt_address_cells(blob, parent);
|
|
size_len = fdt_size_cells(blob, parent);
|
|
both_len = addr_len + size_len;
|
|
|
|
cell = fdt_getprop(blob, dev->of_offset, "reg", &len);
|
|
len /= sizeof(*cell);
|
|
count = len / both_len;
|
|
if (!cell || !count)
|
|
return -EINVAL;
|
|
|
|
map = regmap_alloc_count(count);
|
|
if (!map)
|
|
return -ENOMEM;
|
|
|
|
map->base = fdtdec_get_number(cell, addr_len);
|
|
|
|
for (range = map->range; count > 0;
|
|
count--, cell += both_len, range++) {
|
|
range->start = fdtdec_get_number(cell, addr_len);
|
|
range->size = fdtdec_get_number(cell + addr_len, size_len);
|
|
}
|
|
|
|
*mapp = map;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
void *regmap_get_range(struct regmap *map, unsigned int range_num)
|
|
{
|
|
struct regmap_range *range;
|
|
|
|
if (range_num >= map->range_count)
|
|
return NULL;
|
|
range = &map->range[range_num];
|
|
|
|
return map_sysmem(range->start, range->size);
|
|
}
|
|
|
|
int regmap_uninit(struct regmap *map)
|
|
{
|
|
if (map->range_count > 1)
|
|
free(map->range);
|
|
free(map);
|
|
|
|
return 0;
|
|
}
|