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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 589cf349f0e0b06117b52525e9dcaf5e8ab42e9c / . / drivers / misc / stm32mp_fuse.c
blob: 2d661351a17cc70dbf764130d609d5978551cacd [file] [log] [blame]
Patrick Delaunayc3600e12018-05-17 15:24:06 +0200[diff] [blame]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 */
18int 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 break;
33
34 default:
35 printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
36 ret = -EINVAL;
37 break;
38 }
39
40 return ret;
41}
42
43int fuse_prog(u32 bank, u32 word, u32 val)
44{
45 struct udevice *dev;
46 int ret;
47
48 switch (bank) {
49 case STM32MP_OTP_BANK:
50 ret = uclass_get_device_by_driver(UCLASS_MISC,
51 DM_GET_DRIVER(stm32mp_bsec),
52 &dev);
53 if (ret)
54 return ret;
55 ret = misc_write(dev, word * 4 + STM32_BSEC_OTP_OFFSET,
56 &val, 4);
57 break;
58
59 default:
60 printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
61 ret = -EINVAL;
62 break;
63 }
64
65 return ret;
66}
67
68int fuse_sense(u32 bank, u32 word, u32 *val)
69{
70 struct udevice *dev;
71 int ret;
72
73 switch (bank) {
74 case STM32MP_OTP_BANK:
75 ret = uclass_get_device_by_driver(UCLASS_MISC,
76 DM_GET_DRIVER(stm32mp_bsec),
77 &dev);
78 if (ret)
79 return ret;
80 ret = misc_read(dev, word * 4 + STM32_BSEC_OTP_OFFSET, val, 4);
81 break;
82
83 default:
84 printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
85 ret = -EINVAL;
86 break;
87 }
88
89 return ret;
90}
91
92int fuse_override(u32 bank, u32 word, u32 val)
93{
94 struct udevice *dev;
95 int ret;
96
97 switch (bank) {
98 case STM32MP_OTP_BANK:
99 ret = uclass_get_device_by_driver(UCLASS_MISC,
100 DM_GET_DRIVER(stm32mp_bsec),
101 &dev);
102 if (ret)
103 return ret;
104 ret = misc_write(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET,
105 &val, 4);
106 break;
107
108 default:
109 printf("stm32mp %s: wrong value for bank %i\n",
110 __func__, bank);
111 ret = -EINVAL;
112 break;
113 }
114
115 return ret;
116}