1
2
3
4
5
6#include <linux/device.h>
7#include <linux/kernel.h>
8#include <linux/bug.h>
9
10#include <soc/tegra/fuse.h>
11
12#include "fuse.h"
13
14#define CPU_PROCESS_CORNERS 2
15#define GPU_PROCESS_CORNERS 2
16#define SOC_PROCESS_CORNERS 3
17
18#define FUSE_CPU_SPEEDO_0 0x014
19#define FUSE_CPU_SPEEDO_1 0x02c
20#define FUSE_CPU_SPEEDO_2 0x030
21#define FUSE_SOC_SPEEDO_0 0x034
22#define FUSE_SOC_SPEEDO_1 0x038
23#define FUSE_SOC_SPEEDO_2 0x03c
24#define FUSE_CPU_IDDQ 0x018
25#define FUSE_SOC_IDDQ 0x040
26#define FUSE_GPU_IDDQ 0x128
27#define FUSE_FT_REV 0x028
28
29enum {
30 THRESHOLD_INDEX_0,
31 THRESHOLD_INDEX_1,
32 THRESHOLD_INDEX_COUNT,
33};
34
35static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
36 { 2119, UINT_MAX },
37 { 2119, UINT_MAX },
38};
39
40static const u32 __initconst gpu_process_speedos[][GPU_PROCESS_CORNERS] = {
41 { UINT_MAX, UINT_MAX },
42 { UINT_MAX, UINT_MAX },
43};
44
45static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = {
46 { 1950, 2100, UINT_MAX },
47 { 1950, 2100, UINT_MAX },
48};
49
50static u8 __init get_speedo_revision(void)
51{
52 return tegra_fuse_read_spare(4) << 2 |
53 tegra_fuse_read_spare(3) << 1 |
54 tegra_fuse_read_spare(2) << 0;
55}
56
57static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
58 u8 speedo_rev, int *threshold)
59{
60 int sku = sku_info->sku_id;
61
62
63 sku_info->cpu_speedo_id = 0;
64 sku_info->soc_speedo_id = 0;
65 sku_info->gpu_speedo_id = 0;
66 *threshold = THRESHOLD_INDEX_0;
67
68 switch (sku) {
69 case 0x00:
70 case 0x01:
71 case 0x07:
72 case 0x17:
73 case 0x27:
74 if (speedo_rev >= 2)
75 sku_info->gpu_speedo_id = 1;
76 break;
77
78 case 0x13:
79 if (speedo_rev >= 2)
80 sku_info->gpu_speedo_id = 1;
81
82 sku_info->cpu_speedo_id = 1;
83 break;
84
85 default:
86 pr_err("Tegra210: unknown SKU %#04x\n", sku);
87
88 break;
89 }
90}
91
92static int get_process_id(int value, const u32 *speedos, unsigned int num)
93{
94 unsigned int i;
95
96 for (i = 0; i < num; i++)
97 if (value < speedos[num])
98 return i;
99
100 return -EINVAL;
101}
102
103void __init tegra210_init_speedo_data(struct tegra_sku_info *sku_info)
104{
105 int cpu_speedo[3], soc_speedo[3], cpu_iddq, gpu_iddq, soc_iddq;
106 unsigned int index;
107 u8 speedo_revision;
108
109 BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
110 THRESHOLD_INDEX_COUNT);
111 BUILD_BUG_ON(ARRAY_SIZE(gpu_process_speedos) !=
112 THRESHOLD_INDEX_COUNT);
113 BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) !=
114 THRESHOLD_INDEX_COUNT);
115
116
117 cpu_speedo[0] = tegra_fuse_read_early(FUSE_CPU_SPEEDO_0);
118 cpu_speedo[1] = tegra_fuse_read_early(FUSE_CPU_SPEEDO_1);
119 cpu_speedo[2] = tegra_fuse_read_early(FUSE_CPU_SPEEDO_2);
120
121 soc_speedo[0] = tegra_fuse_read_early(FUSE_SOC_SPEEDO_0);
122 soc_speedo[1] = tegra_fuse_read_early(FUSE_SOC_SPEEDO_1);
123 soc_speedo[2] = tegra_fuse_read_early(FUSE_SOC_SPEEDO_2);
124
125 cpu_iddq = tegra_fuse_read_early(FUSE_CPU_IDDQ) * 4;
126 soc_iddq = tegra_fuse_read_early(FUSE_SOC_IDDQ) * 4;
127 gpu_iddq = tegra_fuse_read_early(FUSE_GPU_IDDQ) * 5;
128
129
130
131
132
133 speedo_revision = get_speedo_revision();
134 pr_info("Speedo Revision %u\n", speedo_revision);
135
136 if (speedo_revision >= 3) {
137 sku_info->cpu_speedo_value = cpu_speedo[0];
138 sku_info->gpu_speedo_value = cpu_speedo[2];
139 sku_info->soc_speedo_value = soc_speedo[0];
140 } else if (speedo_revision == 2) {
141 sku_info->cpu_speedo_value = (-1938 + (1095 * cpu_speedo[0] / 100)) / 10;
142 sku_info->gpu_speedo_value = (-1662 + (1082 * cpu_speedo[2] / 100)) / 10;
143 sku_info->soc_speedo_value = ( -705 + (1037 * soc_speedo[0] / 100)) / 10;
144 } else {
145 sku_info->cpu_speedo_value = 2100;
146 sku_info->gpu_speedo_value = cpu_speedo[2] - 75;
147 sku_info->soc_speedo_value = 1900;
148 }
149
150 if ((sku_info->cpu_speedo_value <= 0) ||
151 (sku_info->gpu_speedo_value <= 0) ||
152 (sku_info->soc_speedo_value <= 0)) {
153 WARN(1, "speedo value not fused\n");
154 return;
155 }
156
157 rev_sku_to_speedo_ids(sku_info, speedo_revision, &index);
158
159 sku_info->gpu_process_id = get_process_id(sku_info->gpu_speedo_value,
160 gpu_process_speedos[index],
161 GPU_PROCESS_CORNERS);
162
163 sku_info->cpu_process_id = get_process_id(sku_info->cpu_speedo_value,
164 cpu_process_speedos[index],
165 CPU_PROCESS_CORNERS);
166
167 sku_info->soc_process_id = get_process_id(sku_info->soc_speedo_value,
168 soc_process_speedos[index],
169 SOC_PROCESS_CORNERS);
170
171 pr_debug("Tegra GPU Speedo ID=%d, Speedo Value=%d\n",
172 sku_info->gpu_speedo_id, sku_info->gpu_speedo_value);
173}
174
