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
|
/*
* Copyright (C) 2016 Toradex AG.
*
* Author: Sanchayan Maity <sanchayan.maity@toradex.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/device.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/nvmem-consumer.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/random.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/sys_soc.h>
struct vf610_soc {
struct device *dev;
struct soc_device_attribute *soc_dev_attr;
struct soc_device *soc_dev;
struct nvmem_cell *ocotp_cfg0;
struct nvmem_cell *ocotp_cfg1;
};
static int vf610_soc_probe(struct platform_device *pdev)
{
struct vf610_soc *info;
struct device *dev = &pdev->dev;
struct device_node *soc_node;
char soc_type[] = "xx0";
size_t id1_len;
size_t id2_len;
u32 cpucount;
u32 l2size;
u32 rom_rev;
u8 *socid1;
u8 *socid2;
char *socid;
int ret;
info = devm_kzalloc(dev, sizeof(struct vf610_soc), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->dev = dev;
info->ocotp_cfg0 = devm_nvmem_cell_get(dev, "cfg0");
if (IS_ERR(info->ocotp_cfg0))
return -EPROBE_DEFER;
info->ocotp_cfg1 = devm_nvmem_cell_get(dev, "cfg1");
if (IS_ERR(info->ocotp_cfg1))
return -EPROBE_DEFER;
socid1 = nvmem_cell_read(info->ocotp_cfg0, &id1_len);
if (IS_ERR(socid1)) {
dev_err(dev, "Could not read nvmem cell %ld\n",
PTR_ERR(socid1));
return PTR_ERR(socid1);
}
socid2 = nvmem_cell_read(info->ocotp_cfg1, &id2_len);
if (IS_ERR(socid2)) {
dev_err(dev, "Could not read nvmem cell %ld\n",
PTR_ERR(socid2));
kfree(socid1);
return PTR_ERR(socid2);
}
add_device_randomness(socid1, id1_len);
add_device_randomness(socid2, id2_len);
socid = devm_kasprintf(dev, GFP_KERNEL,
"%02x%02x%02x%02x%02x%02x%02x%02x",
socid1[3], socid1[2], socid1[1], socid1[0],
socid2[3], socid2[2], socid2[1], socid2[0]);
kfree(socid1);
kfree(socid2);
soc_node = of_find_node_by_path("/soc");
if (soc_node == NULL)
return -ENODEV;
ret = syscon_regmap_read_from_offset(soc_node,
"fsl,rom-revision", &rom_rev);
if (ret) {
of_node_put(soc_node);
return ret;
}
ret = syscon_regmap_read_from_offset(soc_node,
"fsl,cpu-count", &cpucount);
if (ret) {
of_node_put(soc_node);
return ret;
}
ret = syscon_regmap_read_from_offset(soc_node,
"fsl,l2-size", &l2size);
if (ret) {
of_node_put(soc_node);
return ret;
}
of_node_put(soc_node);
soc_type[0] = cpucount ? '6' : '5'; /* Dual Core => VF6x0 */
soc_type[1] = l2size ? '1' : '0'; /* L2 Cache => VFx10 */
info->soc_dev_attr = devm_kzalloc(dev,
sizeof(info->soc_dev_attr), GFP_KERNEL);
if (!info->soc_dev_attr)
return -ENOMEM;
info->soc_dev_attr->machine = devm_kasprintf(dev,
GFP_KERNEL, "Freescale Vybrid");
info->soc_dev_attr->soc_id = socid;
info->soc_dev_attr->family = devm_kasprintf(&pdev->dev,
GFP_KERNEL, "Freescale Vybrid VF%s",
soc_type);
info->soc_dev_attr->revision = devm_kasprintf(dev,
GFP_KERNEL, "%08x", rom_rev);
platform_set_drvdata(pdev, info);
info->soc_dev = soc_device_register(info->soc_dev_attr);
if (IS_ERR(info->soc_dev))
return -ENODEV;
return 0;
}
static int vf610_soc_remove(struct platform_device *pdev)
{
struct vf610_soc *info = platform_get_drvdata(pdev);
if (info->soc_dev)
soc_device_unregister(info->soc_dev);
return 0;
}
static const struct of_device_id vf610_soc_bus_match[] = {
{ .compatible = "fsl,vf610-soc-bus", },
{ /* */ }
};
static struct platform_driver vf610_soc_driver = {
.probe = vf610_soc_probe,
.remove = vf610_soc_remove,
.driver = {
.name = "vf610-soc-bus",
.of_match_table = vf610_soc_bus_match,
},
};
module_platform_driver(vf610_soc_driver);
|
