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7#include <common.h>
8#include <dm.h>
9#include <errno.h>
10#include <linux/libfdt.h>
11#include <malloc.h>
12#include <mapmem.h>
13#include <regmap.h>
14#include <asm/io.h>
15#include <dm/of_addr.h>
16#include <linux/ioport.h>
17
18DECLARE_GLOBAL_DATA_PTR;
19
20static struct regmap *regmap_alloc(int count)
21{
22 struct regmap *map;
23
24 map = malloc(sizeof(*map) + sizeof(map->ranges[0]) * count);
25 if (!map)
26 return NULL;
27 map->range_count = count;
28
29 return map;
30}
31
32#if CONFIG_IS_ENABLED(OF_PLATDATA)
33int regmap_init_mem_platdata(struct udevice *dev, fdt_val_t *reg, int count,
34 struct regmap **mapp)
35{
36 struct regmap_range *range;
37 struct regmap *map;
38
39 map = regmap_alloc(count);
40 if (!map)
41 return -ENOMEM;
42
43 for (range = map->ranges; count > 0; reg += 2, range++, count--) {
44 range->start = *reg;
45 range->size = reg[1];
46 }
47
48 *mapp = map;
49
50 return 0;
51}
52#else
53int regmap_init_mem(ofnode node, struct regmap **mapp)
54{
55 struct regmap_range *range;
56 struct regmap *map;
57 int count;
58 int addr_len, size_len, both_len;
59 int len;
60 int index;
61 struct resource r;
62
63 addr_len = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
64 size_len = ofnode_read_simple_size_cells(ofnode_get_parent(node));
65 both_len = addr_len + size_len;
66
67 len = ofnode_read_size(node, "reg");
68 if (len < 0)
69 return len;
70 len /= sizeof(fdt32_t);
71 count = len / both_len;
72 if (!count)
73 return -EINVAL;
74
75 map = regmap_alloc(count);
76 if (!map)
77 return -ENOMEM;
78
79 for (range = map->ranges, index = 0; count > 0;
80 count--, range++, index++) {
81 fdt_size_t sz;
82 if (of_live_active()) {
83 of_address_to_resource(ofnode_to_np(node), index, &r);
84 range->start = r.start;
85 range->size = r.end - r.start + 1;
86 } else {
87 range->start = fdtdec_get_addr_size_fixed(gd->fdt_blob,
88 ofnode_to_offset(node), "reg", index,
89 addr_len, size_len, &sz, true);
90 range->size = sz;
91 }
92 }
93
94 *mapp = map;
95
96 return 0;
97}
98#endif
99
100void *regmap_get_range(struct regmap *map, unsigned int range_num)
101{
102 struct regmap_range *range;
103
104 if (range_num >= map->range_count)
105 return NULL;
106 range = &map->ranges[range_num];
107
108 return map_sysmem(range->start, range->size);
109}
110
111int regmap_uninit(struct regmap *map)
112{
113 free(map);
114
115 return 0;
116}
117
118int regmap_read(struct regmap *map, uint offset, uint *valp)
119{
120 u32 *ptr = map_physmem(map->ranges[0].start + offset, 4, MAP_NOCACHE);
121
122 *valp = le32_to_cpu(readl(ptr));
123
124 return 0;
125}
126
127int regmap_write(struct regmap *map, uint offset, uint val)
128{
129 u32 *ptr = map_physmem(map->ranges[0].start + offset, 4, MAP_NOCACHE);
130
131 writel(cpu_to_le32(val), ptr);
132
133 return 0;
134}
135
136int regmap_update_bits(struct regmap *map, uint offset, uint mask, uint val)
137{
138 uint reg;
139 int ret;
140
141 ret = regmap_read(map, offset, ®);
142 if (ret)
143 return ret;
144
145 reg &= ~mask;
146
147 return regmap_write(map, offset, reg | val);
148}
149
