2 * Copyright (c) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
16 #include <dm/of_addr.h>
17 #include <linux/ioport.h>
19 DECLARE_GLOBAL_DATA_PTR;
21 static struct regmap *regmap_alloc_count(int count)
25 map = malloc(sizeof(struct regmap));
29 map->range = &map->base_range;
31 map->range = malloc(count * sizeof(struct regmap_range));
37 map->range_count = count;
42 #if CONFIG_IS_ENABLED(OF_PLATDATA)
43 int regmap_init_mem_platdata(struct udevice *dev, u32 *reg, int count,
46 struct regmap_range *range;
49 map = regmap_alloc_count(count);
54 for (range = map->range; count > 0; reg += 2, range++, count--) {
64 int regmap_init_mem(struct udevice *dev, struct regmap **mapp)
66 struct regmap_range *range;
69 int addr_len, size_len, both_len;
72 ofnode node = dev_ofnode(dev);
75 addr_len = dev_read_addr_cells(dev->parent);
76 size_len = dev_read_size_cells(dev->parent);
77 both_len = addr_len + size_len;
79 len = dev_read_size(dev, "reg");
82 len /= sizeof(fdt32_t);
83 count = len / both_len;
87 map = regmap_alloc_count(count);
91 for (range = map->range, index = 0; count > 0;
92 count--, range++, index++) {
94 if (of_live_active()) {
95 of_address_to_resource(ofnode_to_np(node), index, &r);
96 range->start = r.start;
97 range->size = r.end - r.start + 1;
99 range->start = fdtdec_get_addr_size_fixed(gd->fdt_blob,
100 dev_of_offset(dev), "reg", index,
101 addr_len, size_len, &sz, true);
105 map->base = map->range[0].start;
113 void *regmap_get_range(struct regmap *map, unsigned int range_num)
115 struct regmap_range *range;
117 if (range_num >= map->range_count)
119 range = &map->range[range_num];
121 return map_sysmem(range->start, range->size);
124 int regmap_uninit(struct regmap *map)
126 if (map->range_count > 1)
133 int regmap_read(struct regmap *map, uint offset, uint *valp)
135 uint32_t *ptr = map_physmem(map->base + offset, 4, MAP_NOCACHE);
137 *valp = le32_to_cpu(readl(ptr));
142 int regmap_write(struct regmap *map, uint offset, uint val)
144 uint32_t *ptr = map_physmem(map->base + offset, 4, MAP_NOCACHE);
146 writel(cpu_to_le32(val), ptr);