projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 25cd5a39 DH |
1 | /* |
| 2 | * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify it | |
| 5 | * under the terms and conditions of the GNU General Public License, | |
| 6 | * version 2, as published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 11 | * more details. | |
| 12 | * | |
| 13 | * You should have received a copy of the GNU General Public License | |
| 14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 15 | */ | |
| 16 | ||
| 17 | #include <linux/kernel.h> | |
| 18 | #include <linux/bug.h> | |
| 19 | ||
| 20 | #include "fuse.h" | |
| 21 | ||
| 22 | #define CPU_SPEEDO_LSBIT 20 | |
| 23 | #define CPU_SPEEDO_MSBIT 29 | |
| 24 | #define CPU_SPEEDO_REDUND_LSBIT 30 | |
| 25 | #define CPU_SPEEDO_REDUND_MSBIT 39 | |
| 26 | #define CPU_SPEEDO_REDUND_OFFS (CPU_SPEEDO_REDUND_MSBIT - CPU_SPEEDO_MSBIT) | |
| 27 | ||
| 28 | #define CORE_SPEEDO_LSBIT 40 | |
| 29 | #define CORE_SPEEDO_MSBIT 47 | |
| 30 | #define CORE_SPEEDO_REDUND_LSBIT 48 | |
| 31 | #define CORE_SPEEDO_REDUND_MSBIT 55 | |
| 32 | #define CORE_SPEEDO_REDUND_OFFS (CORE_SPEEDO_REDUND_MSBIT - CORE_SPEEDO_MSBIT) | |
| 33 | ||
| 34 | #define SPEEDO_MULT 4 | |
| 35 | ||
| 36 | #define PROCESS_CORNERS_NUM 4 | |
| 37 | ||
| 38 | #define SPEEDO_ID_SELECT_0(rev) ((rev) <= 2) | |
| 39 | #define SPEEDO_ID_SELECT_1(sku) \ | |
| 40 | (((sku) != 20) && ((sku) != 23) && ((sku) != 24) && \ | |
| 41 | ((sku) != 27) && ((sku) != 28)) | |
| 42 | ||
| 43 | enum { | |
| 44 | SPEEDO_ID_0, | |
| 45 | SPEEDO_ID_1, | |
| 46 | SPEEDO_ID_2, | |
| 47 | SPEEDO_ID_COUNT, | |
| 48 | }; | |
| 49 | ||
| 50 | static const u32 cpu_process_speedos[][PROCESS_CORNERS_NUM] = { | |
| 51 | {315, 366, 420, UINT_MAX}, | |
| 52 | {303, 368, 419, UINT_MAX}, | |
| 53 | {316, 331, 383, UINT_MAX}, | |
| 54 | }; | |
| 55 | ||
| 56 | static const u32 core_process_speedos[][PROCESS_CORNERS_NUM] = { | |
| 57 | {165, 195, 224, UINT_MAX}, | |
| 58 | {165, 195, 224, UINT_MAX}, | |
| 59 | {165, 195, 224, UINT_MAX}, | |
| 60 | }; | |
| 61 | ||
| 62 | void tegra20_init_speedo_data(void) | |
| 63 | { | |
| 64 | u32 reg; | |
| 65 | u32 val; | |
| 66 | int i; | |
| 67 | ||
| 68 | BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != SPEEDO_ID_COUNT); | |
| 69 | BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != SPEEDO_ID_COUNT); | |
| 70 | ||
| 71 | if (SPEEDO_ID_SELECT_0(tegra_revision)) | |
| 72 | tegra_soc_speedo_id = SPEEDO_ID_0; | |
| 73 | else if (SPEEDO_ID_SELECT_1(tegra_sku_id)) | |
| 74 | tegra_soc_speedo_id = SPEEDO_ID_1; | |
| 75 | else | |
| 76 | tegra_soc_speedo_id = SPEEDO_ID_2; | |
| 77 | ||
| 78 | val = 0; | |
| 79 | for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) { | |
| 80 | reg = tegra_spare_fuse(i) | | |
| 81 | tegra_spare_fuse(i + CPU_SPEEDO_REDUND_OFFS); | |
| 82 | val = (val << 1) | (reg & 0x1); | |
| 83 | } | |
| 84 | val = val * SPEEDO_MULT; | |
| 85 | pr_debug("%s CPU speedo value %u\n", __func__, val); | |
| 86 | ||
| 87 | for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) { | |
| 88 | if (val <= cpu_process_speedos[tegra_soc_speedo_id][i]) | |
| 89 | break; | |
| 90 | } | |
| 91 | tegra_cpu_process_id = i; | |
| 92 | ||
| 93 | val = 0; | |
| 94 | for (i = CORE_SPEEDO_MSBIT; i >= CORE_SPEEDO_LSBIT; i--) { | |
| 95 | reg = tegra_spare_fuse(i) | | |
| 96 | tegra_spare_fuse(i + CORE_SPEEDO_REDUND_OFFS); | |
| 97 | val = (val << 1) | (reg & 0x1); | |
| 98 | } | |
| 99 | val = val * SPEEDO_MULT; | |
| 100 | pr_debug("%s Core speedo value %u\n", __func__, val); | |
| 101 | ||
| 102 | for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) { | |
| 103 | if (val <= core_process_speedos[tegra_soc_speedo_id][i]) | |
| 104 | break; | |
| 105 | } | |
| 106 | tegra_core_process_id = i; | |
| 107 | ||
| 108 | pr_info("Tegra20 Soc Speedo ID %d", tegra_soc_speedo_id); | |
| 109 | } |