This source file includes following definitions.
- tegra30_fuse_read_early
- tegra30_fuse_read
- tegra30_fuse_add_randomness
- tegra30_fuse_init
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5
6 #include <linux/device.h>
7 #include <linux/clk.h>
8 #include <linux/err.h>
9 #include <linux/io.h>
10 #include <linux/kernel.h>
11 #include <linux/of_device.h>
12 #include <linux/of_address.h>
13 #include <linux/platform_device.h>
14 #include <linux/random.h>
15
16 #include <soc/tegra/fuse.h>
17
18 #include "fuse.h"
19
20 #define FUSE_BEGIN 0x100
21
22
23 #define FUSE_VENDOR_CODE 0x100
24 #define FUSE_FAB_CODE 0x104
25 #define FUSE_LOT_CODE_0 0x108
26 #define FUSE_LOT_CODE_1 0x10c
27 #define FUSE_WAFER_ID 0x110
28 #define FUSE_X_COORDINATE 0x114
29 #define FUSE_Y_COORDINATE 0x118
30
31 #define FUSE_HAS_REVISION_INFO BIT(0)
32
33 #if defined(CONFIG_ARCH_TEGRA_3x_SOC) || \
34 defined(CONFIG_ARCH_TEGRA_114_SOC) || \
35 defined(CONFIG_ARCH_TEGRA_124_SOC) || \
36 defined(CONFIG_ARCH_TEGRA_132_SOC) || \
37 defined(CONFIG_ARCH_TEGRA_210_SOC) || \
38 defined(CONFIG_ARCH_TEGRA_186_SOC) || \
39 defined(CONFIG_ARCH_TEGRA_194_SOC)
40 static u32 tegra30_fuse_read_early(struct tegra_fuse *fuse, unsigned int offset)
41 {
42 if (WARN_ON(!fuse->base))
43 return 0;
44
45 return readl_relaxed(fuse->base + FUSE_BEGIN + offset);
46 }
47
48 static u32 tegra30_fuse_read(struct tegra_fuse *fuse, unsigned int offset)
49 {
50 u32 value;
51 int err;
52
53 err = clk_prepare_enable(fuse->clk);
54 if (err < 0) {
55 dev_err(fuse->dev, "failed to enable FUSE clock: %d\n", err);
56 return 0;
57 }
58
59 value = readl_relaxed(fuse->base + FUSE_BEGIN + offset);
60
61 clk_disable_unprepare(fuse->clk);
62
63 return value;
64 }
65
66 static void __init tegra30_fuse_add_randomness(void)
67 {
68 u32 randomness[12];
69
70 randomness[0] = tegra_sku_info.sku_id;
71 randomness[1] = tegra_read_straps();
72 randomness[2] = tegra_read_chipid();
73 randomness[3] = tegra_sku_info.cpu_process_id << 16;
74 randomness[3] |= tegra_sku_info.soc_process_id;
75 randomness[4] = tegra_sku_info.cpu_speedo_id << 16;
76 randomness[4] |= tegra_sku_info.soc_speedo_id;
77 randomness[5] = tegra_fuse_read_early(FUSE_VENDOR_CODE);
78 randomness[6] = tegra_fuse_read_early(FUSE_FAB_CODE);
79 randomness[7] = tegra_fuse_read_early(FUSE_LOT_CODE_0);
80 randomness[8] = tegra_fuse_read_early(FUSE_LOT_CODE_1);
81 randomness[9] = tegra_fuse_read_early(FUSE_WAFER_ID);
82 randomness[10] = tegra_fuse_read_early(FUSE_X_COORDINATE);
83 randomness[11] = tegra_fuse_read_early(FUSE_Y_COORDINATE);
84
85 add_device_randomness(randomness, sizeof(randomness));
86 }
87
88 static void __init tegra30_fuse_init(struct tegra_fuse *fuse)
89 {
90 fuse->read_early = tegra30_fuse_read_early;
91 fuse->read = tegra30_fuse_read;
92
93 tegra_init_revision();
94
95 if (fuse->soc->speedo_init)
96 fuse->soc->speedo_init(&tegra_sku_info);
97
98 tegra30_fuse_add_randomness();
99 }
100 #endif
101
102 #ifdef CONFIG_ARCH_TEGRA_3x_SOC
103 static const struct tegra_fuse_info tegra30_fuse_info = {
104 .read = tegra30_fuse_read,
105 .size = 0x2a4,
106 .spare = 0x144,
107 };
108
109 const struct tegra_fuse_soc tegra30_fuse_soc = {
110 .init = tegra30_fuse_init,
111 .speedo_init = tegra30_init_speedo_data,
112 .info = &tegra30_fuse_info,
113 };
114 #endif
115
116 #ifdef CONFIG_ARCH_TEGRA_114_SOC
117 static const struct tegra_fuse_info tegra114_fuse_info = {
118 .read = tegra30_fuse_read,
119 .size = 0x2a0,
120 .spare = 0x180,
121 };
122
123 const struct tegra_fuse_soc tegra114_fuse_soc = {
124 .init = tegra30_fuse_init,
125 .speedo_init = tegra114_init_speedo_data,
126 .info = &tegra114_fuse_info,
127 };
128 #endif
129
130 #if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
131 static const struct tegra_fuse_info tegra124_fuse_info = {
132 .read = tegra30_fuse_read,
133 .size = 0x300,
134 .spare = 0x200,
135 };
136
137 const struct tegra_fuse_soc tegra124_fuse_soc = {
138 .init = tegra30_fuse_init,
139 .speedo_init = tegra124_init_speedo_data,
140 .info = &tegra124_fuse_info,
141 };
142 #endif
143
144 #if defined(CONFIG_ARCH_TEGRA_210_SOC)
145 static const struct tegra_fuse_info tegra210_fuse_info = {
146 .read = tegra30_fuse_read,
147 .size = 0x300,
148 .spare = 0x280,
149 };
150
151 const struct tegra_fuse_soc tegra210_fuse_soc = {
152 .init = tegra30_fuse_init,
153 .speedo_init = tegra210_init_speedo_data,
154 .info = &tegra210_fuse_info,
155 };
156 #endif
157
158 #if defined(CONFIG_ARCH_TEGRA_186_SOC)
159 static const struct tegra_fuse_info tegra186_fuse_info = {
160 .read = tegra30_fuse_read,
161 .size = 0x300,
162 .spare = 0x280,
163 };
164
165 const struct tegra_fuse_soc tegra186_fuse_soc = {
166 .init = tegra30_fuse_init,
167 .info = &tegra186_fuse_info,
168 };
169 #endif