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 <fuse.h>
9 #include <misc.h>
10 #include <errno.h>
11 #include <dm/device.h>
12 #include <dm/uclass.h>
13 #include <power/stpmic1.h>
14
15 #define STM32MP_OTP_BANK 0
16 #define STM32MP_NVM_BANK 1
17
18 /*
19 * The 'fuse' command API
20 */
fuse_read(u32 bank,u32 word,u32 * val)21 int fuse_read(u32 bank, u32 word, u32 *val)
22 {
23 int ret;
24 struct udevice *dev;
25
26 switch (bank) {
27 case STM32MP_OTP_BANK:
28 ret = uclass_get_device_by_driver(UCLASS_MISC,
29 DM_DRIVER_GET(stm32mp_bsec),
30 &dev);
31 if (ret)
32 return ret;
33 ret = misc_read(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET,
34 val, 4);
35 if (ret != 4)
36 ret = -EINVAL;
37 else
38 ret = 0;
39 break;
40
41 #ifdef CONFIG_PMIC_STPMIC1
42 case STM32MP_NVM_BANK:
43 ret = uclass_get_device_by_driver(UCLASS_MISC,
44 DM_DRIVER_GET(stpmic1_nvm),
45 &dev);
46 if (ret)
47 return ret;
48 *val = 0;
49 ret = misc_read(dev, -word, val, 1);
50 if (ret != 1)
51 ret = -EINVAL;
52 else
53 ret = 0;
54 break;
55 #endif /* CONFIG_PMIC_STPMIC1 */
56
57 default:
58 printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
59 ret = -EINVAL;
60 break;
61 }
62
63 return ret;
64 }
65
fuse_prog(u32 bank,u32 word,u32 val)66 int fuse_prog(u32 bank, u32 word, u32 val)
67 {
68 struct udevice *dev;
69 int ret;
70
71 switch (bank) {
72 case STM32MP_OTP_BANK:
73 ret = uclass_get_device_by_driver(UCLASS_MISC,
74 DM_DRIVER_GET(stm32mp_bsec),
75 &dev);
76 if (ret)
77 return ret;
78 ret = misc_write(dev, word * 4 + STM32_BSEC_OTP_OFFSET,
79 &val, 4);
80 if (ret != 4)
81 ret = -EINVAL;
82 else
83 ret = 0;
84 break;
85
86 #ifdef CONFIG_PMIC_STPMIC1
87 case STM32MP_NVM_BANK:
88 ret = uclass_get_device_by_driver(UCLASS_MISC,
89 DM_DRIVER_GET(stpmic1_nvm),
90 &dev);
91 if (ret)
92 return ret;
93 ret = misc_write(dev, word, &val, 1);
94 if (ret != 1)
95 ret = -EINVAL;
96 else
97 ret = 0;
98 break;
99 #endif /* CONFIG_PMIC_STPMIC1 */
100
101 default:
102 printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
103 ret = -EINVAL;
104 break;
105 }
106
107 return ret;
108 }
109
fuse_sense(u32 bank,u32 word,u32 * val)110 int fuse_sense(u32 bank, u32 word, u32 *val)
111 {
112 struct udevice *dev;
113 int ret;
114
115 switch (bank) {
116 case STM32MP_OTP_BANK:
117 ret = uclass_get_device_by_driver(UCLASS_MISC,
118 DM_DRIVER_GET(stm32mp_bsec),
119 &dev);
120 if (ret)
121 return ret;
122 ret = misc_read(dev, word * 4 + STM32_BSEC_OTP_OFFSET, val, 4);
123 if (ret != 4)
124 ret = -EINVAL;
125 else
126 ret = 0;
127 break;
128
129 #ifdef CONFIG_PMIC_STPMIC1
130 case STM32MP_NVM_BANK:
131 ret = uclass_get_device_by_driver(UCLASS_MISC,
132 DM_DRIVER_GET(stpmic1_nvm),
133 &dev);
134 if (ret)
135 return ret;
136 *val = 0;
137 ret = misc_read(dev, word, val, 1);
138 if (ret != 1)
139 ret = -EINVAL;
140 else
141 ret = 0;
142 break;
143 #endif /* CONFIG_PMIC_STPMIC1 */
144
145 default:
146 printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
147 ret = -EINVAL;
148 break;
149 }
150
151 return ret;
152 }
153
fuse_override(u32 bank,u32 word,u32 val)154 int fuse_override(u32 bank, u32 word, u32 val)
155 {
156 struct udevice *dev;
157 int ret;
158
159 switch (bank) {
160 case STM32MP_OTP_BANK:
161 ret = uclass_get_device_by_driver(UCLASS_MISC,
162 DM_DRIVER_GET(stm32mp_bsec),
163 &dev);
164 if (ret)
165 return ret;
166 ret = misc_write(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET,
167 &val, 4);
168 if (ret != 4)
169 ret = -EINVAL;
170 else
171 ret = 0;
172 break;
173
174 #ifdef CONFIG_PMIC_STPMIC1
175 case STM32MP_NVM_BANK:
176 ret = uclass_get_device_by_driver(UCLASS_MISC,
177 DM_DRIVER_GET(stpmic1_nvm),
178 &dev);
179 if (ret)
180 return ret;
181 ret = misc_write(dev, -word, &val, 1);
182 if (ret != 1)
183 ret = -EINVAL;
184 else
185 ret = 0;
186 break;
187 #endif /* CONFIG_PMIC_STPMIC1 */
188
189 default:
190 printf("stm32mp %s: wrong value for bank %i\n",
191 __func__, bank);
192 ret = -EINVAL;
193 break;
194 }
195
196 return ret;
197 }
198