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/*
* Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#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 CORE_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 core_process_speedos[][CORE_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, cpu_speedo_0_value, soc_speedo_0_value;
int cpu_iddq_value, gpu_iddq_value, soc_iddq_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(core_process_speedos) !=
THRESHOLD_INDEX_COUNT);
cpu_speedo_0_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_0);
/* 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);
cpu_iddq_value = tegra_fuse_read_early(FUSE_CPU_IDDQ);
soc_iddq_value = tegra_fuse_read_early(FUSE_SOC_IDDQ);
gpu_iddq_value = tegra_fuse_read_early(FUSE_GPU_IDDQ);
sku_info->cpu_speedo_value = cpu_speedo_0_value;
if (sku_info->cpu_speedo_value == 0) {
pr_warn("Tegra Warning: Speedo value not fused.\n");
WARN_ON(1);
return;
}
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 < CORE_PROCESS_CORNERS; i++)
if (soc_speedo_0_value <
core_process_speedos[threshold][i])
break;
sku_info->core_process_id = i;
pr_debug("Tegra GPU Speedo ID=%d, Speedo Value=%d\n",
sku_info->gpu_speedo_id, sku_info->gpu_speedo_value);
}
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