// 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);
}