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99 lines
2.5 KiB
99 lines
2.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (c) 2012-2014, NVIDIA CORPORATION. All rights reserved. |
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*/ |
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#include <linux/bug.h> |
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#include <linux/device.h> |
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#include <linux/kernel.h> |
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#include <soc/tegra/fuse.h> |
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#include "fuse.h" |
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#define CPU_SPEEDO_LSBIT 20 |
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#define CPU_SPEEDO_MSBIT 29 |
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#define CPU_SPEEDO_REDUND_LSBIT 30 |
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#define CPU_SPEEDO_REDUND_MSBIT 39 |
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#define CPU_SPEEDO_REDUND_OFFS (CPU_SPEEDO_REDUND_MSBIT - CPU_SPEEDO_MSBIT) |
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#define SOC_SPEEDO_LSBIT 40 |
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#define SOC_SPEEDO_MSBIT 47 |
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#define SOC_SPEEDO_REDUND_LSBIT 48 |
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#define SOC_SPEEDO_REDUND_MSBIT 55 |
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#define SOC_SPEEDO_REDUND_OFFS (SOC_SPEEDO_REDUND_MSBIT - SOC_SPEEDO_MSBIT) |
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#define SPEEDO_MULT 4 |
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#define PROCESS_CORNERS_NUM 4 |
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#define SPEEDO_ID_SELECT_0(rev) ((rev) <= 2) |
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#define SPEEDO_ID_SELECT_1(sku) \ |
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(((sku) != 20) && ((sku) != 23) && ((sku) != 24) && \ |
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((sku) != 27) && ((sku) != 28)) |
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enum { |
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SPEEDO_ID_0, |
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SPEEDO_ID_1, |
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SPEEDO_ID_2, |
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SPEEDO_ID_COUNT, |
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}; |
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static const u32 __initconst cpu_process_speedos[][PROCESS_CORNERS_NUM] = { |
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{315, 366, 420, UINT_MAX}, |
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{303, 368, 419, UINT_MAX}, |
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{316, 331, 383, UINT_MAX}, |
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}; |
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static const u32 __initconst soc_process_speedos[][PROCESS_CORNERS_NUM] = { |
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{165, 195, 224, UINT_MAX}, |
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{165, 195, 224, UINT_MAX}, |
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{165, 195, 224, UINT_MAX}, |
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}; |
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void __init tegra20_init_speedo_data(struct tegra_sku_info *sku_info) |
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{ |
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u32 reg; |
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u32 val; |
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int i; |
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BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != SPEEDO_ID_COUNT); |
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BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) != SPEEDO_ID_COUNT); |
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if (SPEEDO_ID_SELECT_0(sku_info->revision)) |
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sku_info->soc_speedo_id = SPEEDO_ID_0; |
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else if (SPEEDO_ID_SELECT_1(sku_info->sku_id)) |
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sku_info->soc_speedo_id = SPEEDO_ID_1; |
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else |
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sku_info->soc_speedo_id = SPEEDO_ID_2; |
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val = 0; |
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for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) { |
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reg = tegra_fuse_read_spare(i) | |
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tegra_fuse_read_spare(i + CPU_SPEEDO_REDUND_OFFS); |
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val = (val << 1) | (reg & 0x1); |
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} |
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val = val * SPEEDO_MULT; |
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pr_debug("Tegra CPU speedo value %u\n", val); |
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for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) { |
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if (val <= cpu_process_speedos[sku_info->soc_speedo_id][i]) |
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break; |
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} |
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sku_info->cpu_process_id = i; |
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val = 0; |
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for (i = SOC_SPEEDO_MSBIT; i >= SOC_SPEEDO_LSBIT; i--) { |
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reg = tegra_fuse_read_spare(i) | |
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tegra_fuse_read_spare(i + SOC_SPEEDO_REDUND_OFFS); |
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val = (val << 1) | (reg & 0x1); |
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} |
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val = val * SPEEDO_MULT; |
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pr_debug("Core speedo value %u\n", val); |
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for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) { |
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if (val <= soc_process_speedos[sku_info->soc_speedo_id][i]) |
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break; |
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} |
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sku_info->soc_process_id = i; |
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}
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