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git01.mediatek.com / filogic / uboot / 632341f49e3c5fb14bed5dabddffe9574f81df7f / . / drivers / misc / stm32mp_fuse.c
blob: 33943a231b1008e935f741e7de9e35cd88d03f4f [file] [log] [blame]
Patrick Delaunay0c4656b2018-05-17 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);
Simon Glass587dc402018-11-06 15:21:39 -0700[diff] [blame]32 if (ret < 0)
33 return ret;
34 ret = 0;
Patrick Delaunay0c4656b2018-05-17 15:24:06 +0200[diff] [blame]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
46int 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);
Simon Glass587dc402018-11-06 15:21:39 -0700[diff] [blame]60 if (ret < 0)
61 return ret;
62 ret = 0;
Patrick Delaunay0c4656b2018-05-17 15:24:06 +0200[diff] [blame]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
74int 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);
Simon Glass587dc402018-11-06 15:21:39 -0700[diff] [blame]87 if (ret < 0)
88 return ret;
89 ret = 0;
Patrick Delaunay0c4656b2018-05-17 15:24:06 +0200[diff] [blame]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
101int 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);
Simon Glass587dc402018-11-06 15:21:39 -0700[diff] [blame]115 if (ret < 0)
116 return ret;
117 ret = 0;
Patrick Delaunay0c4656b2018-05-17 15:24:06 +0200[diff] [blame]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}