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

   1 /*
   2  * Copyright (c) 2013-2014, NVIDIA CORPORATION.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include <linux/device.h>
  18 #include <linux/kernel.h>
  19 #include <linux/bug.h>
  20
  21 #include <soc/tegra/fuse.h>
  22
  23 #include "fuse.h"
  24
  25 #define CPU_PROCESS_CORNERS     2
  26 #define GPU_PROCESS_CORNERS     2
  27 #define SOC_PROCESS_CORNERS     2
  28
  29 #define FUSE_CPU_SPEEDO_0       0x14
  30 #define FUSE_CPU_SPEEDO_1       0x2c
  31 #define FUSE_CPU_SPEEDO_2       0x30
  32 #define FUSE_SOC_SPEEDO_0       0x34
  33 #define FUSE_SOC_SPEEDO_1       0x38
  34 #define FUSE_SOC_SPEEDO_2       0x3c
  35 #define FUSE_CPU_IDDQ           0x18
  36 #define FUSE_SOC_IDDQ           0x40
  37 #define FUSE_GPU_IDDQ           0x128
  38 #define FUSE_FT_REV             0x28
  39
  40 enum {
  41         THRESHOLD_INDEX_0,
  42         THRESHOLD_INDEX_1,
  43         THRESHOLD_INDEX_COUNT,
  44 };
  45
  46 static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
  47         {2190,  UINT_MAX},
  48         {0,     UINT_MAX},
  49 };
  50
  51 static const u32 __initconst gpu_process_speedos[][GPU_PROCESS_CORNERS] = {
  52         {1965,  UINT_MAX},
  53         {0,     UINT_MAX},
  54 };
  55
  56 static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = {
  57         {2101,  UINT_MAX},
  58         {0,     UINT_MAX},
  59 };
  60
  61 static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
  62                                          int *threshold)
  63 {
  64         int sku = sku_info->sku_id;
  65
  66         /* Assign to default */
  67         sku_info->cpu_speedo_id = 0;
  68         sku_info->soc_speedo_id = 0;
  69         sku_info->gpu_speedo_id = 0;
  70         *threshold = THRESHOLD_INDEX_0;
  71
  72         switch (sku) {
  73         case 0x00: /* Eng sku */
  74         case 0x0F:
  75         case 0x23:
  76                 /* Using the default */
  77                 break;
  78         case 0x83:
  79                 sku_info->cpu_speedo_id = 2;
  80                 break;
  81
  82         case 0x1F:
  83         case 0x87:
  84         case 0x27:
  85                 sku_info->cpu_speedo_id = 2;
  86                 sku_info->soc_speedo_id = 0;
  87                 sku_info->gpu_speedo_id = 1;
  88                 *threshold = THRESHOLD_INDEX_0;
  89                 break;
  90         case 0x81:
  91         case 0x21:
  92         case 0x07:
  93                 sku_info->cpu_speedo_id = 1;
  94                 sku_info->soc_speedo_id = 1;
  95                 sku_info->gpu_speedo_id = 1;
  96                 *threshold = THRESHOLD_INDEX_1;
  97                 break;
  98         case 0x49:
  99         case 0x4A:
 100         case 0x48:
 101                 sku_info->cpu_speedo_id = 4;
 102                 sku_info->soc_speedo_id = 2;
 103                 sku_info->gpu_speedo_id = 3;
 104                 *threshold = THRESHOLD_INDEX_1;
 105                 break;
 106         default:
 107                 pr_err("Tegra Unknown SKU %d\n", sku);
 108                 /* Using the default for the error case */
 109                 break;
 110         }
 111 }
 112
 113 void __init tegra124_init_speedo_data(struct tegra_sku_info *sku_info)
 114 {
 115         int i, threshold, cpu_speedo_0_value, soc_speedo_0_value;
 116         int cpu_iddq_value, gpu_iddq_value, soc_iddq_value;
 117
 118         BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
 119                         THRESHOLD_INDEX_COUNT);
 120         BUILD_BUG_ON(ARRAY_SIZE(gpu_process_speedos) !=
 121                         THRESHOLD_INDEX_COUNT);
 122         BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) !=
 123                         THRESHOLD_INDEX_COUNT);
 124
 125         cpu_speedo_0_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_0);
 126
 127         /* GPU Speedo is stored in CPU_SPEEDO_2 */
 128         sku_info->gpu_speedo_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_2);
 129
 130         soc_speedo_0_value = tegra_fuse_read_early(FUSE_SOC_SPEEDO_0);
 131
 132         cpu_iddq_value = tegra_fuse_read_early(FUSE_CPU_IDDQ);
 133         soc_iddq_value = tegra_fuse_read_early(FUSE_SOC_IDDQ);
 134         gpu_iddq_value = tegra_fuse_read_early(FUSE_GPU_IDDQ);
 135
 136         sku_info->cpu_speedo_value = cpu_speedo_0_value;
 137
 138         if (sku_info->cpu_speedo_value == 0) {
 139                 pr_warn("Tegra Warning: Speedo value not fused.\n");
 140                 WARN_ON(1);
 141                 return;
 142         }
 143
 144         rev_sku_to_speedo_ids(sku_info, &threshold);
 145
 146         sku_info->cpu_iddq_value = tegra_fuse_read_early(FUSE_CPU_IDDQ);
 147
 148         for (i = 0; i < GPU_PROCESS_CORNERS; i++)
 149                 if (sku_info->gpu_speedo_value <
 150                         gpu_process_speedos[threshold][i])
 151                         break;
 152         sku_info->gpu_process_id = i;
 153
 154         for (i = 0; i < CPU_PROCESS_CORNERS; i++)
 155                 if (sku_info->cpu_speedo_value <
 156                         cpu_process_speedos[threshold][i])
 157                                 break;
 158         sku_info->cpu_process_id = i;
 159
 160         for (i = 0; i < SOC_PROCESS_CORNERS; i++)
 161                 if (soc_speedo_0_value <
 162                         soc_process_speedos[threshold][i])
 163                         break;
 164         sku_info->soc_process_id = i;
 165
 166         pr_debug("Tegra GPU Speedo ID=%d, Speedo Value=%d\n",
 167                  sku_info->gpu_speedo_id, sku_info->gpu_speedo_value);
 168 }