1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
4 */
5
6 #include <common.h>
7 #include <command.h>
8 #include <misc.h>
9 #include <errno.h>
10 #include <dm/device.h>
11 #include <dm/uclass.h>
12
13 #define STM32MP_OTP_BANK 0
14
15 /*
16 * The 'fuse' command API
17 */
fuse_read(u32 bank,u32 word,u32 * val)18 int fuse_read(u32 bank, u32 word, u32 *val)
19 {
20 int ret = 0;
21 struct udevice *dev;
22
23 switch (bank) {
24 case STM32MP_OTP_BANK:
25 ret = uclass_get_device_by_driver(UCLASS_MISC,
26 DM_GET_DRIVER(stm32mp_bsec),
27 &dev);
28 if (ret)
29 return ret;
30 ret = misc_read(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET,
31 val, 4);
32 if (ret < 0)
33 return ret;
34 ret = 0;
35 break;
36
37 default:
38 printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
39 ret = -EINVAL;
40 break;
41 }
42
43 return ret;
44 }
45
fuse_prog(u32 bank,u32 word,u32 val)46 int fuse_prog(u32 bank, u32 word, u32 val)
47 {
48 struct udevice *dev;
49 int ret;
50
51 switch (bank) {
52 case STM32MP_OTP_BANK:
53 ret = uclass_get_device_by_driver(UCLASS_MISC,
54 DM_GET_DRIVER(stm32mp_bsec),
55 &dev);
56 if (ret)
57 return ret;
58 ret = misc_write(dev, word * 4 + STM32_BSEC_OTP_OFFSET,
59 &val, 4);
60 if (ret < 0)
61 return ret;
62 ret = 0;
63 break;
64
65 default:
66 printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
67 ret = -EINVAL;
68 break;
69 }
70
71 return ret;
72 }
73
fuse_sense(u32 bank,u32 word,u32 * val)74 int fuse_sense(u32 bank, u32 word, u32 *val)
75 {
76 struct udevice *dev;
77 int ret;
78
79 switch (bank) {
80 case STM32MP_OTP_BANK:
81 ret = uclass_get_device_by_driver(UCLASS_MISC,
82 DM_GET_DRIVER(stm32mp_bsec),
83 &dev);
84 if (ret)
85 return ret;
86 ret = misc_read(dev, word * 4 + STM32_BSEC_OTP_OFFSET, val, 4);
87 if (ret < 0)
88 return ret;
89 ret = 0;
90 break;
91
92 default:
93 printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
94 ret = -EINVAL;
95 break;
96 }
97
98 return ret;
99 }
100
fuse_override(u32 bank,u32 word,u32 val)101 int fuse_override(u32 bank, u32 word, u32 val)
102 {
103 struct udevice *dev;
104 int ret;
105
106 switch (bank) {
107 case STM32MP_OTP_BANK:
108 ret = uclass_get_device_by_driver(UCLASS_MISC,
109 DM_GET_DRIVER(stm32mp_bsec),
110 &dev);
111 if (ret)
112 return ret;
113 ret = misc_write(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET,
114 &val, 4);
115 if (ret < 0)
116 return ret;
117 ret = 0;
118 break;
119
120 default:
121 printf("stm32mp %s: wrong value for bank %i\n",
122 __func__, bank);
123 ret = -EINVAL;
124 break;
125 }
126
127 return ret;
128 }
129