1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved. 4 */ 5 6 #include <linux/bug.h> 7 #include <linux/device.h> 8 #include <linux/kernel.h> 9 10 #include <soc/tegra/fuse.h> 11 12 #include "fuse.h" 13 14 #define SOC_PROCESS_CORNERS 2 15 #define CPU_PROCESS_CORNERS 2 16 17 enum { 18 THRESHOLD_INDEX_0, 19 THRESHOLD_INDEX_1, 20 THRESHOLD_INDEX_COUNT, 21 }; 22 23 static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = { 24 {1123, UINT_MAX}, 25 {0, UINT_MAX}, 26 }; 27 28 static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = { 29 {1695, UINT_MAX}, 30 {0, UINT_MAX}, 31 }; 32 33 static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info, 34 int *threshold) 35 { 36 u32 tmp; 37 u32 sku = sku_info->sku_id; 38 enum tegra_revision rev = sku_info->revision; 39 40 switch (sku) { 41 case 0x00: 42 case 0x10: 43 case 0x05: 44 case 0x06: 45 sku_info->cpu_speedo_id = 1; 46 sku_info->soc_speedo_id = 0; 47 *threshold = THRESHOLD_INDEX_0; 48 break; 49 50 case 0x03: 51 case 0x04: 52 sku_info->cpu_speedo_id = 2; 53 sku_info->soc_speedo_id = 1; 54 *threshold = THRESHOLD_INDEX_1; 55 break; 56 57 default: 58 pr_err("Tegra Unknown SKU %d\n", sku); 59 sku_info->cpu_speedo_id = 0; 60 sku_info->soc_speedo_id = 0; 61 *threshold = THRESHOLD_INDEX_0; 62 break; 63 } 64 65 if (rev == TEGRA_REVISION_A01) { 66 tmp = tegra_fuse_read_early(0x270) << 1; 67 tmp |= tegra_fuse_read_early(0x26c); 68 if (!tmp) 69 sku_info->cpu_speedo_id = 0; 70 } 71 } 72 73 void __init tegra114_init_speedo_data(struct tegra_sku_info *sku_info) 74 { 75 u32 cpu_speedo_val; 76 u32 soc_speedo_val; 77 int threshold; 78 int i; 79 80 BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != 81 THRESHOLD_INDEX_COUNT); 82 BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) != 83 THRESHOLD_INDEX_COUNT); 84 85 rev_sku_to_speedo_ids(sku_info, &threshold); 86 87 cpu_speedo_val = tegra_fuse_read_early(0x12c) + 1024; 88 soc_speedo_val = tegra_fuse_read_early(0x134); 89 90 for (i = 0; i < CPU_PROCESS_CORNERS; i++) 91 if (cpu_speedo_val < cpu_process_speedos[threshold][i]) 92 break; 93 sku_info->cpu_process_id = i; 94 95 for (i = 0; i < SOC_PROCESS_CORNERS; i++) 96 if (soc_speedo_val < soc_process_speedos[threshold][i]) 97 break; 98 sku_info->soc_process_id = i; 99 } 100