From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 04:40:36 +0000 Subject: initial_commit --- arch/arm/mach-tegra/fuse.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 arch/arm/mach-tegra/fuse.c (limited to 'arch/arm/mach-tegra/fuse.c') diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c new file mode 100644 index 00000000..1fa26d9a --- /dev/null +++ b/arch/arm/mach-tegra/fuse.c @@ -0,0 +1,84 @@ +/* + * arch/arm/mach-tegra/fuse.c + * + * Copyright (C) 2010 Google, Inc. + * + * Author: + * Colin Cross + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that 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. + * + */ + +#include +#include + +#include + +#include "fuse.h" + +#define FUSE_UID_LOW 0x108 +#define FUSE_UID_HIGH 0x10c +#define FUSE_SKU_INFO 0x110 +#define FUSE_SPARE_BIT 0x200 + +static inline u32 fuse_readl(unsigned long offset) +{ + return readl(IO_TO_VIRT(TEGRA_FUSE_BASE + offset)); +} + +static inline void fuse_writel(u32 value, unsigned long offset) +{ + writel(value, IO_TO_VIRT(TEGRA_FUSE_BASE + offset)); +} + +void tegra_init_fuse(void) +{ + u32 reg = readl(IO_TO_VIRT(TEGRA_CLK_RESET_BASE + 0x48)); + reg |= 1 << 28; + writel(reg, IO_TO_VIRT(TEGRA_CLK_RESET_BASE + 0x48)); + + pr_info("Tegra SKU: %d CPU Process: %d Core Process: %d\n", + tegra_sku_id(), tegra_cpu_process_id(), + tegra_core_process_id()); +} + +unsigned long long tegra_chip_uid(void) +{ + unsigned long long lo, hi; + + lo = fuse_readl(FUSE_UID_LOW); + hi = fuse_readl(FUSE_UID_HIGH); + return (hi << 32ull) | lo; +} + +int tegra_sku_id(void) +{ + int sku_id; + u32 reg = fuse_readl(FUSE_SKU_INFO); + sku_id = reg & 0xFF; + return sku_id; +} + +int tegra_cpu_process_id(void) +{ + int cpu_process_id; + u32 reg = fuse_readl(FUSE_SPARE_BIT); + cpu_process_id = (reg >> 6) & 3; + return cpu_process_id; +} + +int tegra_core_process_id(void) +{ + int core_process_id; + u32 reg = fuse_readl(FUSE_SPARE_BIT); + core_process_id = (reg >> 12) & 3; + return core_process_id; +} -- cgit v1.2.3