stm32mp_fuse.c
2.23 KB
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
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
*/
#include <common.h>
#include <command.h>
#include <misc.h>
#include <errno.h>
#include <dm/device.h>
#include <dm/uclass.h>
#define STM32MP_OTP_BANK 0
/*
* The 'fuse' command API
*/
int fuse_read(u32 bank, u32 word, u32 *val)
{
int ret = 0;
struct udevice *dev;
switch (bank) {
case STM32MP_OTP_BANK:
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(stm32mp_bsec),
&dev);
if (ret)
return ret;
ret = misc_read(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET,
val, 4);
if (ret < 0)
return ret;
ret = 0;
break;
default:
printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
ret = -EINVAL;
break;
}
return ret;
}
int fuse_prog(u32 bank, u32 word, u32 val)
{
struct udevice *dev;
int ret;
switch (bank) {
case STM32MP_OTP_BANK:
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(stm32mp_bsec),
&dev);
if (ret)
return ret;
ret = misc_write(dev, word * 4 + STM32_BSEC_OTP_OFFSET,
&val, 4);
if (ret < 0)
return ret;
ret = 0;
break;
default:
printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
ret = -EINVAL;
break;
}
return ret;
}
int fuse_sense(u32 bank, u32 word, u32 *val)
{
struct udevice *dev;
int ret;
switch (bank) {
case STM32MP_OTP_BANK:
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(stm32mp_bsec),
&dev);
if (ret)
return ret;
ret = misc_read(dev, word * 4 + STM32_BSEC_OTP_OFFSET, val, 4);
if (ret < 0)
return ret;
ret = 0;
break;
default:
printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
ret = -EINVAL;
break;
}
return ret;
}
int fuse_override(u32 bank, u32 word, u32 val)
{
struct udevice *dev;
int ret;
switch (bank) {
case STM32MP_OTP_BANK:
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(stm32mp_bsec),
&dev);
if (ret)
return ret;
ret = misc_write(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET,
&val, 4);
if (ret < 0)
return ret;
ret = 0;
break;
default:
printf("stm32mp %s: wrong value for bank %i\n",
__func__, bank);
ret = -EINVAL;
break;
}
return ret;
}