Quelle  speedo-tegra124.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2013-2014, NVIDIA CORPORATION.  All rights reserved.
 */

#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/bug.h>

#include <soc/tegra/fuse.h>

#include "fuse.h"

#define CPU_PROCESS_CORNERS 2
#define GPU_PROCESS_CORNERS 2
#define SOC_PROCESS_CORNERS 2

#define FUSE_CPU_SPEEDO_0 0x14
#define FUSE_CPU_SPEEDO_1 0x2c
#define FUSE_CPU_SPEEDO_2 0x30
#define FUSE_SOC_SPEEDO_0 0x34
#define FUSE_SOC_SPEEDO_1 0x38
#define FUSE_SOC_SPEEDO_2 0x3c
#define FUSE_CPU_IDDQ  0x18
#define FUSE_SOC_IDDQ  0x40
#define FUSE_GPU_IDDQ  0x128
#define FUSE_FT_REV  0x28

enum {
 THRESHOLD_INDEX_0,
 THRESHOLD_INDEX_1,
 THRESHOLD_INDEX_COUNT,
};

static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
 {2190, UINT_MAX},
 {0, UINT_MAX},
};

static const u32 __initconst gpu_process_speedos[][GPU_PROCESS_CORNERS] = {
 {1965, UINT_MAX},
 {0, UINT_MAX},
};

static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = {
 {2101, UINT_MAX},
 {0, UINT_MAX},
};

static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
      int *threshold)
{
 int sku = sku_info->sku_id;

 /* Assign to default */
 sku_info->cpu_speedo_id = 0;
 sku_info->soc_speedo_id = 0;
 sku_info->gpu_speedo_id = 0;
 *threshold = THRESHOLD_INDEX_0;

 switch (sku) {
 case 0x00: /* Eng sku */
 case 0x0F:
 case 0x23:
  /* Using the default */
  break;
 case 0x83:
  sku_info->cpu_speedo_id = 2;
  break;

 case 0x1F:
 case 0x87:
 case 0x27:
  sku_info->cpu_speedo_id = 2;
  sku_info->soc_speedo_id = 0;
  sku_info->gpu_speedo_id = 1;
  *threshold = THRESHOLD_INDEX_0;
  break;
 case 0x81:
 case 0x21:
 case 0x07:
  sku_info->cpu_speedo_id = 1;
  sku_info->soc_speedo_id = 1;
  sku_info->gpu_speedo_id = 1;
  *threshold = THRESHOLD_INDEX_1;
  break;
 case 0x49:
 case 0x4A:
 case 0x48:
  sku_info->cpu_speedo_id = 4;
  sku_info->soc_speedo_id = 2;
  sku_info->gpu_speedo_id = 3;
  *threshold = THRESHOLD_INDEX_1;
  break;
 default:
  pr_err("Tegra Unknown SKU %d\n", sku);
  /* Using the default for the error case */
  break;
 }
}

void __init tegra124_init_speedo_data(struct tegra_sku_info *sku_info)
{
 int i, threshold, soc_speedo_0_value;

 BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
   THRESHOLD_INDEX_COUNT);
 BUILD_BUG_ON(ARRAY_SIZE(gpu_process_speedos) !=
   THRESHOLD_INDEX_COUNT);
 BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) !=
   THRESHOLD_INDEX_COUNT);

 sku_info->cpu_speedo_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_0);
 if (sku_info->cpu_speedo_value == 0) {
  pr_warn("Tegra Warning: Speedo value not fused.\n");
  WARN_ON(1);
  return;
 }

 /* GPU Speedo is stored in CPU_SPEEDO_2 */
 sku_info->gpu_speedo_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_2);
 soc_speedo_0_value = tegra_fuse_read_early(FUSE_SOC_SPEEDO_0);

 rev_sku_to_speedo_ids(sku_info, &threshold);

 sku_info->cpu_iddq_value = tegra_fuse_read_early(FUSE_CPU_IDDQ);

 for (i = 0; i < GPU_PROCESS_CORNERS; i++)
  if (sku_info->gpu_speedo_value <
   gpu_process_speedos[threshold][i])
   break;
 sku_info->gpu_process_id = i;

 for (i = 0; i < CPU_PROCESS_CORNERS; i++)
  if (sku_info->cpu_speedo_value <
   cpu_process_speedos[threshold][i])
    break;
 sku_info->cpu_process_id = i;

 for (i = 0; i < SOC_PROCESS_CORNERS; i++)
  if (soc_speedo_0_value <
   soc_process_speedos[threshold][i])
   break;
 sku_info->soc_process_id = i;

 pr_debug("Tegra GPU Speedo ID=%d, Speedo Value=%d\n",
   sku_info->gpu_speedo_id, sku_info->gpu_speedo_value);
}