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/*
* Copyright (c) 2012-2014, 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/bug.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <soc/tegra/fuse.h>
#include "fuse.h"
#define CPU_SPEEDO_LSBIT 20
#define CPU_SPEEDO_MSBIT 29
#define CPU_SPEEDO_REDUND_LSBIT 30
#define CPU_SPEEDO_REDUND_MSBIT 39
#define CPU_SPEEDO_REDUND_OFFS (CPU_SPEEDO_REDUND_MSBIT - CPU_SPEEDO_MSBIT)
#define CORE_SPEEDO_LSBIT 40
#define CORE_SPEEDO_MSBIT 47
#define CORE_SPEEDO_REDUND_LSBIT 48
#define CORE_SPEEDO_REDUND_MSBIT 55
#define CORE_SPEEDO_REDUND_OFFS (CORE_SPEEDO_REDUND_MSBIT - CORE_SPEEDO_MSBIT)
#define SPEEDO_MULT 4
#define PROCESS_CORNERS_NUM 4
#define SPEEDO_ID_SELECT_0(rev) ((rev) <= 2)
#define SPEEDO_ID_SELECT_1(sku) \
(((sku) != 20) && ((sku) != 23) && ((sku) != 24) && \
((sku) != 27) && ((sku) != 28))
enum {
SPEEDO_ID_0,
SPEEDO_ID_1,
SPEEDO_ID_2,
SPEEDO_ID_COUNT,
};
static const u32 __initconst cpu_process_speedos[][PROCESS_CORNERS_NUM] = {
{315, 366, 420, UINT_MAX},
{303, 368, 419, UINT_MAX},
{316, 331, 383, UINT_MAX},
};
static const u32 __initconst core_process_speedos[][PROCESS_CORNERS_NUM] = {
{165, 195, 224, UINT_MAX},
{165, 195, 224, UINT_MAX},
{165, 195, 224, UINT_MAX},
};
void __init tegra20_init_speedo_data(struct tegra_sku_info *sku_info)
{
u32 reg;
u32 val;
int i;
BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != SPEEDO_ID_COUNT);
BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != SPEEDO_ID_COUNT);
if (SPEEDO_ID_SELECT_0(sku_info->revision))
sku_info->soc_speedo_id = SPEEDO_ID_0;
else if (SPEEDO_ID_SELECT_1(sku_info->sku_id))
sku_info->soc_speedo_id = SPEEDO_ID_1;
else
sku_info->soc_speedo_id = SPEEDO_ID_2;
val = 0;
for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) {
reg = tegra_fuse_read_spare(i) |
tegra_fuse_read_spare(i + CPU_SPEEDO_REDUND_OFFS);
val = (val << 1) | (reg & 0x1);
}
val = val * SPEEDO_MULT;
pr_debug("Tegra CPU speedo value %u\n", val);
for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
if (val <= cpu_process_speedos[sku_info->soc_speedo_id][i])
break;
}
sku_info->cpu_process_id = i;
val = 0;
for (i = CORE_SPEEDO_MSBIT; i >= CORE_SPEEDO_LSBIT; i--) {
reg = tegra_fuse_read_spare(i) |
tegra_fuse_read_spare(i + CORE_SPEEDO_REDUND_OFFS);
val = (val << 1) | (reg & 0x1);
}
val = val * SPEEDO_MULT;
pr_debug("Core speedo value %u\n", val);
for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
if (val <= core_process_speedos[sku_info->soc_speedo_id][i])
break;
}
sku_info->core_process_id = i;
}
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