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

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

#include <soc/tegra/fuse.h>

#include "fuse.h"

#define SOC_PROCESS_CORNERS     2
#define CPU_PROCESS_CORNERS     2

enum {
        THRESHOLD_INDEX_0,
        THRESHOLD_INDEX_1,
        THRESHOLD_INDEX_COUNT,
};

static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = {
        {1123,     UINT_MAX},
        {0,        UINT_MAX},
};

static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
        {1695,     UINT_MAX},
        {0,        UINT_MAX},
};

static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
                                         int *threshold)
{
        u32 tmp;
        u32 sku = sku_info->sku_id;
        enum tegra_revision rev = sku_info->revision;

        switch (sku) {
        case 0x00:
        case 0x10:
        case 0x05:
        case 0x06:
                sku_info->cpu_speedo_id = 1;
                sku_info->soc_speedo_id = 0;
                *threshold = THRESHOLD_INDEX_0;
                break;

        case 0x03:
        case 0x04:
                sku_info->cpu_speedo_id = 2;
                sku_info->soc_speedo_id = 1;
                *threshold = THRESHOLD_INDEX_1;
                break;

        default:
                pr_err("Tegra Unknown SKU %d\n", sku);
                sku_info->cpu_speedo_id = 0;
                sku_info->soc_speedo_id = 0;
                *threshold = THRESHOLD_INDEX_0;
                break;
        }

        if (rev == TEGRA_REVISION_A01) {
                tmp = tegra_fuse_read_early(0x270) << 1;
                tmp |= tegra_fuse_read_early(0x26c);
                if (!tmp)
                        sku_info->cpu_speedo_id = 0;
        }
}

void __init tegra114_init_speedo_data(struct tegra_sku_info *sku_info)
{
        u32 cpu_speedo_val;
        u32 soc_speedo_val;
        int threshold;
        int i;

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

        rev_sku_to_speedo_ids(sku_info, &threshold);

        cpu_speedo_val = tegra_fuse_read_early(0x12c) + 1024;
        soc_speedo_val = tegra_fuse_read_early(0x134);

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

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