1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
10 #include <linux/libfdt.h>
15 #include <dm/of_addr.h>
16 #include <linux/ioport.h>
18 DECLARE_GLOBAL_DATA_PTR;
20 static struct regmap *regmap_alloc_count(int count)
24 map = malloc(sizeof(struct regmap));
28 map->range = &map->base_range;
30 map->range = malloc(count * sizeof(struct regmap_range));
36 map->range_count = count;
41 #if CONFIG_IS_ENABLED(OF_PLATDATA)
42 int regmap_init_mem_platdata(struct udevice *dev, fdt_val_t *reg, int count,
45 struct regmap_range *range;
48 map = regmap_alloc_count(count);
53 for (range = map->range; count > 0; reg += 2, range++, count--) {
63 int regmap_init_mem(struct udevice *dev, struct regmap **mapp)
65 struct regmap_range *range;
68 int addr_len, size_len, both_len;
71 ofnode node = dev_ofnode(dev);
74 addr_len = dev_read_simple_addr_cells(dev->parent);
75 size_len = dev_read_simple_size_cells(dev->parent);
76 both_len = addr_len + size_len;
78 len = dev_read_size(dev, "reg");
81 len /= sizeof(fdt32_t);
82 count = len / both_len;
86 map = regmap_alloc_count(count);
90 for (range = map->range, index = 0; count > 0;
91 count--, range++, index++) {
93 if (of_live_active()) {
94 of_address_to_resource(ofnode_to_np(node), index, &r);
95 range->start = r.start;
96 range->size = r.end - r.start + 1;
98 range->start = fdtdec_get_addr_size_fixed(gd->fdt_blob,
99 dev_of_offset(dev), "reg", index,
100 addr_len, size_len, &sz, true);
104 map->base = map->range[0].start;
112 void *regmap_get_range(struct regmap *map, unsigned int range_num)
114 struct regmap_range *range;
116 if (range_num >= map->range_count)
118 range = &map->range[range_num];
120 return map_sysmem(range->start, range->size);
123 int regmap_uninit(struct regmap *map)
125 if (map->range_count > 1)
132 int regmap_read(struct regmap *map, uint offset, uint *valp)
134 uint32_t *ptr = map_physmem(map->base + offset, 4, MAP_NOCACHE);
136 *valp = le32_to_cpu(readl(ptr));
141 int regmap_write(struct regmap *map, uint offset, uint val)
143 uint32_t *ptr = map_physmem(map->base + offset, 4, MAP_NOCACHE);
145 writel(cpu_to_le32(val), ptr);