| Danny Huang | 7495b2e | 2013-03-18 19:17:34 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013, 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 CORE_PROCESS_CORNERS_NUM 2 |
| 23 | #define CPU_PROCESS_CORNERS_NUM 2 |
| 24 | |
| 25 | enum { |
| 26 | THRESHOLD_INDEX_0, |
| 27 | THRESHOLD_INDEX_1, |
| 28 | THRESHOLD_INDEX_COUNT, |
| 29 | }; |
| 30 | |
| 31 | static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = { |
| 32 | {1123, UINT_MAX}, |
| 33 | {0, UINT_MAX}, |
| 34 | }; |
| 35 | |
| 36 | static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = { |
| 37 | {1695, UINT_MAX}, |
| 38 | {0, UINT_MAX}, |
| 39 | }; |
| 40 | |
| 41 | static void rev_sku_to_speedo_ids(int rev, int sku, int *threshold) |
| 42 | { |
| 43 | u32 tmp; |
| 44 | |
| 45 | switch (sku) { |
| 46 | case 0x00: |
| 47 | case 0x10: |
| 48 | case 0x05: |
| 49 | case 0x06: |
| 50 | tegra_cpu_speedo_id = 1; |
| 51 | tegra_soc_speedo_id = 0; |
| 52 | *threshold = THRESHOLD_INDEX_0; |
| 53 | break; |
| 54 | |
| 55 | case 0x03: |
| 56 | case 0x04: |
| 57 | tegra_cpu_speedo_id = 2; |
| 58 | tegra_soc_speedo_id = 1; |
| 59 | *threshold = THRESHOLD_INDEX_1; |
| 60 | break; |
| 61 | |
| 62 | default: |
| 63 | pr_err("Tegra114 Unknown SKU %d\n", sku); |
| 64 | tegra_cpu_speedo_id = 0; |
| 65 | tegra_soc_speedo_id = 0; |
| 66 | *threshold = THRESHOLD_INDEX_0; |
| 67 | break; |
| 68 | } |
| 69 | |
| 70 | if (rev == TEGRA_REVISION_A01) { |
| 71 | tmp = tegra_fuse_readl(0x270) << 1; |
| 72 | tmp |= tegra_fuse_readl(0x26c); |
| 73 | if (!tmp) |
| 74 | tegra_cpu_speedo_id = 0; |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | void tegra114_init_speedo_data(void) |
| 79 | { |
| 80 | u32 cpu_speedo_val; |
| 81 | u32 core_speedo_val; |
| 82 | int threshold; |
| 83 | int i; |
| 84 | |
| 85 | BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != |
| 86 | THRESHOLD_INDEX_COUNT); |
| 87 | BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != |
| 88 | THRESHOLD_INDEX_COUNT); |
| 89 | |
| 90 | rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id, &threshold); |
| 91 | |
| 92 | cpu_speedo_val = tegra_fuse_readl(0x12c) + 1024; |
| 93 | core_speedo_val = tegra_fuse_readl(0x134); |
| 94 | |
| 95 | for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++) |
| 96 | if (cpu_speedo_val < cpu_process_speedos[threshold][i]) |
| 97 | break; |
| 98 | tegra_cpu_process_id = i; |
| 99 | |
| 100 | for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++) |
| 101 | if (core_speedo_val < core_process_speedos[threshold][i]) |
| 102 | break; |
| 103 | tegra_core_process_id = i; |
| 104 | } |