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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2023 MediaTek Inc.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/pm_runtime.h>
#include <linux/nvmem-consumer.h>
#include <linux/device.h>
#include <linux/device/bus.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/string.h>
#include <linux/sys_soc.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#define MTK_SOCINFO_ENTRY(_soc_name, _segment_name, _marketing_name, _cell_data1, _cell_data2) {\
.soc_name = _soc_name, \
.segment_name = _segment_name, \
.marketing_name = _marketing_name, \
.cell_data = {_cell_data1, _cell_data2} \
}
#define CELL_NOT_USED (0xFFFFFFFF)
#define MAX_CELLS (2)
struct mtk_socinfo {
struct device *dev;
struct name_data *name_data;
struct socinfo_data *socinfo_data;
struct soc_device *soc_dev;
};
struct socinfo_data {
char *soc_name;
char *segment_name;
char *marketing_name;
u32 cell_data[MAX_CELLS];
};
static const char *cell_names[MAX_CELLS] = {"socinfo-data1", "socinfo-data2"};
static struct socinfo_data socinfo_data_table[] = {
MTK_SOCINFO_ENTRY("MT8173", "MT8173V/AC", "MT8173", 0x6CA20004, 0x10000000),
MTK_SOCINFO_ENTRY("MT8183", "MT8183V/AZA", "Kompanio 500", 0x00010043, 0x00000840),
MTK_SOCINFO_ENTRY("MT8183", "MT8183V/AZA", "Kompanio 500", 0x00010043, 0x00000940),
MTK_SOCINFO_ENTRY("MT8186", "MT8186GV/AZA", "Kompanio 520", 0x81861001, CELL_NOT_USED),
MTK_SOCINFO_ENTRY("MT8186T", "MT8186TV/AZA", "Kompanio 528", 0x81862001, CELL_NOT_USED),
MTK_SOCINFO_ENTRY("MT8188", "MT8188GV/AZA", "Kompanio 830", 0x81880000, 0x00000010),
MTK_SOCINFO_ENTRY("MT8188", "MT8188GV/HZA", "Kompanio 830", 0x81880000, 0x00000011),
MTK_SOCINFO_ENTRY("MT8192", "MT8192V/AZA", "Kompanio 820", 0x00001100, 0x00040080),
MTK_SOCINFO_ENTRY("MT8192T", "MT8192V/ATZA", "Kompanio 828", 0x00000100, 0x000400C0),
MTK_SOCINFO_ENTRY("MT8195", "MT8195GV/EZA", "Kompanio 1200", 0x81950300, CELL_NOT_USED),
MTK_SOCINFO_ENTRY("MT8195", "MT8195GV/EHZA", "Kompanio 1200", 0x81950304, CELL_NOT_USED),
MTK_SOCINFO_ENTRY("MT8195", "MT8195TV/EZA", "Kompanio 1380", 0x81950400, CELL_NOT_USED),
MTK_SOCINFO_ENTRY("MT8195", "MT8195TV/EHZA", "Kompanio 1380", 0x81950404, CELL_NOT_USED),
};
static int mtk_socinfo_create_socinfo_node(struct mtk_socinfo *mtk_socinfop)
{
struct soc_device_attribute *attrs;
static char machine[30] = {0};
static const char *soc_manufacturer = "MediaTek";
attrs = devm_kzalloc(mtk_socinfop->dev, sizeof(*attrs), GFP_KERNEL);
if (!attrs)
return -ENOMEM;
snprintf(machine, sizeof(machine), "%s (%s)", mtk_socinfop->socinfo_data->marketing_name,
mtk_socinfop->socinfo_data->soc_name);
attrs->family = soc_manufacturer;
attrs->machine = machine;
mtk_socinfop->soc_dev = soc_device_register(attrs);
if (IS_ERR(mtk_socinfop->soc_dev))
return PTR_ERR(mtk_socinfop->soc_dev);
dev_info(mtk_socinfop->dev, "%s %s SoC detected.\n", soc_manufacturer, attrs->machine);
return 0;
}
static u32 mtk_socinfo_read_cell(struct device *dev, const char *name)
{
struct nvmem_device *nvmemp;
struct device_node *np, *nvmem_node = dev->parent->of_node;
u32 offset;
u32 cell_val = CELL_NOT_USED;
/* should never fail since the nvmem driver registers this child */
nvmemp = nvmem_device_find(nvmem_node, device_match_of_node);
if (IS_ERR(nvmemp))
goto out;
np = of_get_child_by_name(nvmem_node, name);
if (!np)
goto put_device;
if (of_property_read_u32_index(np, "reg", 0, &offset))
goto put_node;
nvmem_device_read(nvmemp, offset, sizeof(cell_val), &cell_val);
put_node:
of_node_put(np);
put_device:
nvmem_device_put(nvmemp);
out:
return cell_val;
}
static int mtk_socinfo_get_socinfo_data(struct mtk_socinfo *mtk_socinfop)
{
unsigned int i, j;
unsigned int num_cell_data = 0;
u32 cell_data[MAX_CELLS] = {0};
bool match_socinfo;
int match_socinfo_index = -1;
for (i = 0; i < MAX_CELLS; i++) {
cell_data[i] = mtk_socinfo_read_cell(mtk_socinfop->dev, cell_names[i]);
if (cell_data[i] != CELL_NOT_USED)
num_cell_data++;
else
break;
}
if (!num_cell_data)
return -ENOENT;
for (i = 0; i < ARRAY_SIZE(socinfo_data_table); i++) {
match_socinfo = true;
for (j = 0; j < num_cell_data; j++) {
if (cell_data[j] != socinfo_data_table[i].cell_data[j]) {
match_socinfo = false;
break;
}
}
if (match_socinfo) {
mtk_socinfop->socinfo_data = &(socinfo_data_table[i]);
match_socinfo_index = i;
break;
}
}
if (match_socinfo_index < 0) {
dev_warn(mtk_socinfop->dev,
"Unknown MediaTek SoC with ID 0x%08x 0x%08x\n",
cell_data[0], cell_data[1]);
return -ENOENT;
}
return match_socinfo_index;
}
static int mtk_socinfo_probe(struct platform_device *pdev)
{
struct mtk_socinfo *mtk_socinfop;
int ret;
mtk_socinfop = devm_kzalloc(&pdev->dev, sizeof(*mtk_socinfop), GFP_KERNEL);
if (!mtk_socinfop)
return -ENOMEM;
mtk_socinfop->dev = &pdev->dev;
ret = mtk_socinfo_get_socinfo_data(mtk_socinfop);
if (ret < 0)
return dev_err_probe(mtk_socinfop->dev, ret, "Failed to get socinfo data\n");
ret = mtk_socinfo_create_socinfo_node(mtk_socinfop);
if (ret)
return dev_err_probe(mtk_socinfop->dev, ret, "Cannot create node\n");
platform_set_drvdata(pdev, mtk_socinfop);
return 0;
}
static void mtk_socinfo_remove(struct platform_device *pdev)
{
struct mtk_socinfo *mtk_socinfop = platform_get_drvdata(pdev);
soc_device_unregister(mtk_socinfop->soc_dev);
}
static struct platform_driver mtk_socinfo = {
.probe = mtk_socinfo_probe,
.remove_new = mtk_socinfo_remove,
.driver = {
.name = "mtk-socinfo",
},
};
module_platform_driver(mtk_socinfo);
MODULE_AUTHOR("William-TW LIN <william-tw.lin@mediatek.com>");
MODULE_DESCRIPTION("MediaTek socinfo driver");
MODULE_LICENSE("GPL");
|
