drivers/soc/tegra/fuse/speedo-tegra124.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2013-2014, NVIDIA CORPORATION.  All rights reserved.
   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     2
  17
  18 #define FUSE_CPU_SPEEDO_0       0x14
  19 #define FUSE_CPU_SPEEDO_1       0x2c
  20 #define FUSE_CPU_SPEEDO_2       0x30
  21 #define FUSE_SOC_SPEEDO_0       0x34
  22 #define FUSE_SOC_SPEEDO_1       0x38
  23 #define FUSE_SOC_SPEEDO_2       0x3c
  24 #define FUSE_CPU_IDDQ           0x18
  25 #define FUSE_SOC_IDDQ           0x40
  26 #define FUSE_GPU_IDDQ           0x128
  27 #define FUSE_FT_REV             0x28
  28
  29 enum {
  30         THRESHOLD_INDEX_0,
  31         THRESHOLD_INDEX_1,
  32         THRESHOLD_INDEX_COUNT,
  33 };
  34
  35 static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
  36         {2190,  UINT_MAX},
  37         {0,     UINT_MAX},
  38 };
  39
  40 static const u32 __initconst gpu_process_speedos[][GPU_PROCESS_CORNERS] = {
  41         {1965,  UINT_MAX},
  42         {0,     UINT_MAX},
  43 };
  44
  45 static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = {
  46         {2101,  UINT_MAX},
  47         {0,     UINT_MAX},
  48 };
  49
  50 static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
  51                                          int *threshold)
  52 {
  53         int sku = sku_info->sku_id;
  54
  55         /* Assign to default */
  56         sku_info->cpu_speedo_id = 0;
  57         sku_info->soc_speedo_id = 0;
  58         sku_info->gpu_speedo_id = 0;
  59         *threshold = THRESHOLD_INDEX_0;
  60
  61         switch (sku) {
  62         case 0x00: /* Eng sku */
  63         case 0x0F:
  64         case 0x23:
  65                 /* Using the default */
  66                 break;
  67         case 0x83:
  68                 sku_info->cpu_speedo_id = 2;
  69                 break;
  70
  71         case 0x1F:
  72         case 0x87:
  73         case 0x27:
  74                 sku_info->cpu_speedo_id = 2;
  75                 sku_info->soc_speedo_id = 0;
  76                 sku_info->gpu_speedo_id = 1;
  77                 *threshold = THRESHOLD_INDEX_0;
  78                 break;
  79         case 0x81:
  80         case 0x21:
  81         case 0x07:
  82                 sku_info->cpu_speedo_id = 1;
  83                 sku_info->soc_speedo_id = 1;
  84                 sku_info->gpu_speedo_id = 1;
  85                 *threshold = THRESHOLD_INDEX_1;
  86                 break;
  87         case 0x49:
  88         case 0x4A:
  89         case 0x48:
  90                 sku_info->cpu_speedo_id = 4;
  91                 sku_info->soc_speedo_id = 2;
  92                 sku_info->gpu_speedo_id = 3;
  93                 *threshold = THRESHOLD_INDEX_1;
  94                 break;
  95         default:
  96                 pr_err("Tegra Unknown SKU %d\n", sku);
  97                 /* Using the default for the error case */
  98                 break;
  99         }
 100 }
 101
 102 void __init tegra124_init_speedo_data(struct tegra_sku_info *sku_info)
 103 {
 104         int i, threshold, cpu_speedo_0_value, soc_speedo_0_value;
 105         int cpu_iddq_value, gpu_iddq_value, soc_iddq_value;
 106
 107         BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
 108                         THRESHOLD_INDEX_COUNT);
 109         BUILD_BUG_ON(ARRAY_SIZE(gpu_process_speedos) !=
 110                         THRESHOLD_INDEX_COUNT);
 111         BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) !=
 112                         THRESHOLD_INDEX_COUNT);
 113
 114         cpu_speedo_0_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_0);
 115
 116         /* GPU Speedo is stored in CPU_SPEEDO_2 */
 117         sku_info->gpu_speedo_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_2);
 118
 119         soc_speedo_0_value = tegra_fuse_read_early(FUSE_SOC_SPEEDO_0);
 120
 121         cpu_iddq_value = tegra_fuse_read_early(FUSE_CPU_IDDQ);
 122         soc_iddq_value = tegra_fuse_read_early(FUSE_SOC_IDDQ);
 123         gpu_iddq_value = tegra_fuse_read_early(FUSE_GPU_IDDQ);
 124
 125         sku_info->cpu_speedo_value = cpu_speedo_0_value;
 126
 127         if (sku_info->cpu_speedo_value == 0) {
 128                 pr_warn("Tegra Warning: Speedo value not fused.\n");
 129                 WARN_ON(1);
 130                 return;
 131         }
 132
 133         rev_sku_to_speedo_ids(sku_info, &threshold);
 134
 135         sku_info->cpu_iddq_value = tegra_fuse_read_early(FUSE_CPU_IDDQ);
 136
 137         for (i = 0; i < GPU_PROCESS_CORNERS; i++)
 138                 if (sku_info->gpu_speedo_value <
 139                         gpu_process_speedos[threshold][i])
 140                         break;
 141         sku_info->gpu_process_id = i;
 142
 143         for (i = 0; i < CPU_PROCESS_CORNERS; i++)
 144                 if (sku_info->cpu_speedo_value <
 145                         cpu_process_speedos[threshold][i])
 146                                 break;
 147         sku_info->cpu_process_id = i;
 148
 149         for (i = 0; i < SOC_PROCESS_CORNERS; i++)
 150                 if (soc_speedo_0_value <
 151                         soc_process_speedos[threshold][i])
 152                         break;
 153         sku_info->soc_process_id = i;
 154
 155         pr_debug("Tegra GPU Speedo ID=%d, Speedo Value=%d\n",
 156                  sku_info->gpu_speedo_id, sku_info->gpu_speedo_value);
 157 }