Implement fuse driver for Tegra20, Tegra30, Tegra114 and Tegra124. Signed-off-by: Peter De Schrijver <pdeschrijver@xxxxxxxxxx> --- Documentation/ABI/testing/sysfs-driver-tegra-fuse | 8 + drivers/misc/fuse/Kconfig | 12 + drivers/misc/fuse/Makefile | 1 + drivers/misc/fuse/tegra/Makefile | 7 + drivers/misc/fuse/tegra/fuse-tegra.c | 97 +++++++ drivers/misc/fuse/tegra/fuse-tegra20.c | 154 +++++++++++ drivers/misc/fuse/tegra/fuse-tegra30.c | 196 ++++++++++++++ drivers/misc/fuse/tegra/fuse.h | 87 ++++++ drivers/misc/fuse/tegra/tegra114_speedo.c | 109 ++++++++ drivers/misc/fuse/tegra/tegra124_speedo.c | 164 ++++++++++++ drivers/misc/fuse/tegra/tegra20_speedo.c | 109 ++++++++ drivers/misc/fuse/tegra/tegra30_speedo.c | 293 +++++++++++++++++++++ 12 files changed, 1237 insertions(+), 0 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-driver-tegra-fuse create mode 100644 drivers/misc/fuse/Kconfig create mode 100644 drivers/misc/fuse/Makefile create mode 100644 drivers/misc/fuse/tegra/Makefile create mode 100644 drivers/misc/fuse/tegra/fuse-tegra.c create mode 100644 drivers/misc/fuse/tegra/fuse-tegra20.c create mode 100644 drivers/misc/fuse/tegra/fuse-tegra30.c create mode 100644 drivers/misc/fuse/tegra/fuse.h create mode 100644 drivers/misc/fuse/tegra/tegra114_speedo.c create mode 100644 drivers/misc/fuse/tegra/tegra124_speedo.c create mode 100644 drivers/misc/fuse/tegra/tegra20_speedo.c create mode 100644 drivers/misc/fuse/tegra/tegra30_speedo.c diff --git a/Documentation/ABI/testing/sysfs-driver-tegra-fuse b/Documentation/ABI/testing/sysfs-driver-tegra-fuse new file mode 100644 index 0000000..3b5e1ea --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-tegra-fuse @@ -0,0 +1,8 @@ +What: /sys/devices/*/<our-device>/fuse +Date: December 2013 +Contact: Peter De Schrijver <pdeschrijver@xxxxxxxxxx> +Description: read-only access to the efuses on Tegra20, Tegra30, Tegra114 + and Tegra124 SoC's from NVIDIA. The efuses contain write once + data programmed at the factory. +Users: any user space application which wants to read the efuses on + Tegra SoC's diff --git a/drivers/misc/fuse/Kconfig b/drivers/misc/fuse/Kconfig new file mode 100644 index 0000000..fb66758 --- /dev/null +++ b/drivers/misc/fuse/Kconfig @@ -0,0 +1,12 @@ +menu "fuse support" + +config FUSE_TEGRA + tristate "Tegra fuse supprt" + depends on ARCH_TEGRA && SYSFS + help + This drivers provides read-only to the e-fuses in Tegra chips. + Parsing of the data is left to userspace. + + This driver can also be built as a module. If so, the module + will be called tegra_efuse. +endmenu diff --git a/drivers/misc/fuse/Makefile b/drivers/misc/fuse/Makefile new file mode 100644 index 0000000..022c354 --- /dev/null +++ b/drivers/misc/fuse/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_FUSE_TEGRA) += tegra/ diff --git a/drivers/misc/fuse/tegra/Makefile b/drivers/misc/fuse/tegra/Makefile new file mode 100644 index 0000000..42829b3 --- /dev/null +++ b/drivers/misc/fuse/tegra/Makefile @@ -0,0 +1,7 @@ +obj-y += fuse-tegra.o +obj-y += fuse-tegra30.o +obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += fuse-tegra20.o +obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_speedo.o +obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30_speedo.o +obj-$(CONFIG_ARCH_TEGRA_114_SOC) += tegra114_speedo.o +obj-$(CONFIG_ARCH_TEGRA_124_SOC) += tegra124_speedo.o diff --git a/drivers/misc/fuse/tegra/fuse-tegra.c b/drivers/misc/fuse/tegra/fuse-tegra.c new file mode 100644 index 0000000..b66b922 --- /dev/null +++ b/drivers/misc/fuse/tegra/fuse-tegra.c @@ -0,0 +1,97 @@ +/* + * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +#include <linux/device.h> +#include <linux/kobject.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> + +#include "fuse.h" + +static u32 (*fuse_readl)(const unsigned int offset); +static int fuse_size; + +static const char *tegra_revision_name[TEGRA_REVISION_MAX] = { + [TEGRA_REVISION_UNKNOWN] = "unknown", + [TEGRA_REVISION_A01] = "A01", + [TEGRA_REVISION_A02] = "A02", + [TEGRA_REVISION_A03] = "A03", + [TEGRA_REVISION_A03p] = "A03 prime", + [TEGRA_REVISION_A04] = "A04", +}; + +static u8 fuse_readb(const unsigned int offset) +{ + u32 val; + + val = fuse_readl(round_down(offset, 4)); + val >>= (offset % 4) * 8; + val &= 0xff; + + return val; +} + +static ssize_t fuse_read(struct file *fd, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t pos, size_t size) +{ + int i; + + if (pos < 0 || pos >= fuse_size) + return 0; + + if (size > fuse_size - pos) + size = fuse_size - pos; + + for (i = 0; i < size; i++) + buf[i] = fuse_readb(pos + i); + + return i; +} + +static struct bin_attribute fuse_bin_attr = { + .attr = { .name = "fuse", .mode = S_IRUGO, }, + .read = fuse_read, +}; + +int tegra_fuse_sysfs(struct device *dev, int size, + u32 (*readl)(const unsigned int offset), + struct tegra_sku_info *sku_info) +{ + int err; + + if (fuse_size) + return -ENODEV; + + fuse_bin_attr.size = size; + fuse_bin_attr.read = fuse_read; + + fuse_size = size; + fuse_readl = readl; + + err = device_create_bin_file(dev, &fuse_bin_attr); + if (err) + return err; + + dev_info(dev, + "Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n", + tegra_revision_name[sku_info->revision], + sku_info->sku_id, sku_info->cpu_process_id, + sku_info->core_process_id); + + return 0; +} diff --git a/drivers/misc/fuse/tegra/fuse-tegra20.c b/drivers/misc/fuse/tegra/fuse-tegra20.c new file mode 100644 index 0000000..e6d4ae5 --- /dev/null +++ b/drivers/misc/fuse/tegra/fuse-tegra20.c @@ -0,0 +1,154 @@ +/* + * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * Based on drivers/misc/eeprom/sunxi_sid.c + */ + +#include <linux/device.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/kobject.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/random.h> +#include <linux/tegra-soc.h> + +#include "fuse.h" + +#define FUSE_BEGIN 0x100 +#define FUSE_SIZE 0x1f8 +#define FUSE_SKU_INFO 0x10 +#define FUSE_UID_LOW 0x08 +#define FUSE_UID_HIGH 0x0c + +static int fuse_size; +static phys_addr_t fuse_phys; +static struct clk *fuse_clk; +static struct tegra_sku_info sku_info; + +static u32 tegra20_fuse_readl(const unsigned int offset) +{ + int ret; + u32 val; + + clk_prepare_enable(fuse_clk); + + ret = tegra_apb_readl_using_dma(fuse_phys + FUSE_BEGIN + offset, &val); + + clk_disable_unprepare(fuse_clk); + + return (ret < 0) ? 0 : val; +} + +static enum tegra_revision get_revision(void) +{ + u32 minor_rev; + + minor_rev = (tegra_read_chipid() >> 16) & 0xf; + switch (minor_rev) { + case 1: + return TEGRA_REVISION_A01; + case 2: + return TEGRA_REVISION_A02; + case 3: + if ((tegra20_spare_fuse(18) || tegra20_spare_fuse(19))) + return TEGRA_REVISION_A03p; + else + return TEGRA_REVISION_A03; + case 4: + return TEGRA_REVISION_A04; + default: + return TEGRA_REVISION_UNKNOWN; + } +} + +static void fuse_randomness(void) +{ + u32 randomness[7]; + + randomness[0] = tegra20_fuse_readl(FUSE_SKU_INFO); + randomness[1] = tegra_read_straps(); + randomness[2] = tegra_read_chipid(); + randomness[3] = sku_info.cpu_process_id << 16; + randomness[3] |= sku_info.core_process_id; + randomness[4] = sku_info.cpu_speedo_id << 16 | sku_info.soc_speedo_id; + randomness[5] = tegra20_fuse_readl(FUSE_UID_LOW); + randomness[6] = tegra20_fuse_readl(FUSE_UID_HIGH); + + add_device_randomness(randomness, sizeof(randomness)); +} + +bool tegra20_spare_fuse(int spare_bit) +{ + u32 offset = spare_bit * 4 + 0x100; + + return tegra20_fuse_readl(offset) & 1; +} + +static const struct of_device_id tegra20_fuse_of_match[] = { + { .compatible = "nvidia,tegra20-efuse" }, +} + +MODULE_DEVICE_TABLE(of, tegra20_fuse_of_match); + +static int tegra_fuse_probe(struct platform_device *pdev) +{ + struct resource *res; + + if (fuse_size) + return -ENODEV; + + fuse_clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(fuse_clk)) { + dev_err(&pdev->dev, "missing clock"); + return PTR_ERR(fuse_clk); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + fuse_phys = res->start; + + sku_info.revision = get_revision(); + tegra20_init_speedo_data(&sku_info, &pdev->dev); + dev_dbg(&pdev->dev, "Soc Speedo ID %d", sku_info.soc_speedo_id); + + fuse_randomness(); + + platform_set_drvdata(pdev, NULL); + + if (tegra_fuse_sysfs(&pdev->dev, FUSE_SIZE, tegra20_fuse_readl, + &sku_info)) + return -ENODEV; + + dev_dbg(&pdev->dev, "loaded\n"); + + return 0; +} + +static struct platform_driver tegra20_fuse_driver = { + .probe = tegra_fuse_probe, + .driver = { + .name = "tegra20_fuse", + .owner = THIS_MODULE, + .of_match_table = tegra20_fuse_of_match, + } +}; +module_platform_driver(tegra20_fuse_driver); + +MODULE_AUTHOR("Peter De Schrijver"); +MODULE_DESCRIPTION("Tegra20 fuse driver"); +MODULE_LICENSE("GPLv2"); diff --git a/drivers/misc/fuse/tegra/fuse-tegra30.c b/drivers/misc/fuse/tegra/fuse-tegra30.c new file mode 100644 index 0000000..cd8240c --- /dev/null +++ b/drivers/misc/fuse/tegra/fuse-tegra30.c @@ -0,0 +1,196 @@ +/* + * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +#include <linux/device.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/random.h> +#include <linux/tegra-soc.h> + +#include "fuse.h" + +#define FUSE_BEGIN 0x100 + +#define FUSE_SKU_INFO 0x10 + +/* Tegra30 and later */ +#define FUSE_VENDOR_CODE 0x100 +#define FUSE_FAB_CODE 0x104 +#define FUSE_LOT_CODE_0 0x108 +#define FUSE_LOT_CODE_1 0x10c +#define FUSE_WAFER_ID 0x110 +#define FUSE_X_COORDINATE 0x114 +#define FUSE_Y_COORDINATE 0x118 + +#define FUSE_HAS_REVISION_INFO BIT(0) + +struct tegra_fuse_info { + int size; + int spare_bit; + void (*init_speedo_data)(struct tegra_sku_info *sku_info, + struct device *dev); +}; + +static void __iomem *fuse_base; +static struct clk *fuse_clk; +static struct tegra_fuse_info *fuse_info; +static struct tegra_sku_info sku_info; + +u32 tegra30_fuse_readl(const unsigned int offset) +{ + u32 val; + + clk_prepare_enable(fuse_clk); + + val = readl_relaxed(fuse_base + FUSE_BEGIN + offset); + + clk_disable_unprepare(fuse_clk); + + return val; +} + +bool tegra30_spare_fuse(int spare_bit) +{ + u32 offset = fuse_info->spare_bit + spare_bit * 4; + + return tegra30_fuse_readl(offset) & 1; +} + +static enum tegra_revision tegra_get_revision(void) +{ + u32 minor_rev; + + minor_rev = (tegra_read_chipid() >> 16) & 0xf; + switch (minor_rev) { + case 1: + return TEGRA_REVISION_A01; + case 2: + return TEGRA_REVISION_A02; + case 3: + return TEGRA_REVISION_A03; + case 4: + return TEGRA_REVISION_A04; + default: + return TEGRA_REVISION_UNKNOWN; + } +} + +static void fuse_randomness(void) +{ + u32 randomness[12]; + + randomness[0] = tegra30_fuse_readl(FUSE_SKU_INFO); + randomness[1] = tegra_read_straps(); + randomness[2] = tegra_read_chipid(); + randomness[3] = sku_info.cpu_process_id << 16; + randomness[3] |= sku_info.core_process_id; + randomness[4] = sku_info.cpu_speedo_id << 16; + randomness[4] |= sku_info.soc_speedo_id; + randomness[5] = tegra30_fuse_readl(FUSE_VENDOR_CODE); + randomness[6] = tegra30_fuse_readl(FUSE_FAB_CODE); + randomness[7] = tegra30_fuse_readl(FUSE_LOT_CODE_0); + randomness[8] = tegra30_fuse_readl(FUSE_LOT_CODE_1); + randomness[9] = tegra30_fuse_readl(FUSE_WAFER_ID); + randomness[10] = tegra30_fuse_readl(FUSE_X_COORDINATE); + randomness[11] = tegra30_fuse_readl(FUSE_Y_COORDINATE); + + add_device_randomness(randomness, sizeof(randomness)); +} + +static struct tegra_fuse_info tegra30_info = { + .size = 0x2a4, + .spare_bit = 0x144, + .init_speedo_data = tegra30_init_speedo_data, +}; + +static struct tegra_fuse_info tegra114_info = { + .size = 0x2a0, + .init_speedo_data = tegra114_init_speedo_data, +}; + +static struct tegra_fuse_info tegra124_info = { + .size = 0x300, + .init_speedo_data = tegra124_init_speedo_data, +}; + +static const struct of_device_id tegra_fuse_of_match[] = { + { .compatible = "nvidia,tegra30-efuse", .data = &tegra30_info }, + { .compatible = "nvidia,tegra114-efuse", .data = &tegra114_info }, + { .compatible = "nvidia,tegra124-efuse", .data = &tegra124_info }, + {}, +}; +MODULE_DEVICE_TABLE(of, tegra_fuse_of_match); + +static int tegra_fuse_probe(struct platform_device *pdev) +{ + const struct of_device_id *of_dev_id; + struct resource *res; + + of_dev_id = of_match_device(tegra_fuse_of_match, &pdev->dev); + if (!of_dev_id) + return -ENODEV; + fuse_info = (struct tegra_fuse_info *)of_dev_id->data; + + fuse_clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(fuse_clk)) { + dev_err(&pdev->dev, "missing clock"); + return PTR_ERR(fuse_clk); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + fuse_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(fuse_base)) { + dev_err(&pdev->dev, "unable to map base address"); + return PTR_ERR(fuse_base); + } + + sku_info.revision = tegra_get_revision(); + fuse_info->init_speedo_data(&sku_info, &pdev->dev); + dev_dbg(&pdev->dev, "CPU Speedo ID %d, Soc Speedo ID %d", + sku_info.cpu_speedo_id, sku_info.soc_speedo_id); + + fuse_randomness(); + + platform_set_drvdata(pdev, NULL); + + if (tegra_fuse_sysfs(&pdev->dev, fuse_info->size, tegra30_fuse_readl, + &sku_info)) + return -ENODEV; + + dev_dbg(&pdev->dev, "loaded\n"); + + return 0; +} + +static struct platform_driver tegra_fuse_driver = { + .probe = tegra_fuse_probe, + .driver = { + .name = "tegra_fuse", + .owner = THIS_MODULE, + .of_match_table = tegra_fuse_of_match, + } +}; +module_platform_driver(tegra_fuse_driver); + +MODULE_AUTHOR("Peter De Schrijver"); +MODULE_DESCRIPTION("Tegra fuse driver"); +MODULE_LICENSE("GPLv2"); diff --git a/drivers/misc/fuse/tegra/fuse.h b/drivers/misc/fuse/tegra/fuse.h new file mode 100644 index 0000000..88913cc --- /dev/null +++ b/drivers/misc/fuse/tegra/fuse.h @@ -0,0 +1,87 @@ +/* + * Copyright (C) 2010 Google, Inc. + * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved. + * + * Author: + * Colin Cross <ccross@xxxxxxxxxxx> + * + * 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. + * + */ + +#ifndef __DRIVERS_MISC_TEGRA_FUSE_H +#define __DRIVERS_MISC_TEGRA_FUSE_H + +enum tegra_revision { + TEGRA_REVISION_UNKNOWN = 0, + TEGRA_REVISION_A01, + TEGRA_REVISION_A02, + TEGRA_REVISION_A03, + TEGRA_REVISION_A03p, + TEGRA_REVISION_A04, + TEGRA_REVISION_MAX, +}; + +struct tegra_sku_info { + int sku_id; + int cpu_process_id; + int cpu_speedo_id; + int cpu_speedo_value; + int cpu_iddq_value; + int core_process_id; + int soc_speedo_id; + int gpu_speedo_id; + int gpu_process_id; + int gpu_speedo_value; + enum tegra_revision revision; +}; + +int tegra_fuse_sysfs(struct device *dev, int size, + u32 (*readl)(const unsigned int offset), + struct tegra_sku_info *sku_info); + +bool tegra30_spare_fuse(int bit); +u32 tegra30_fuse_readl(const unsigned int offset); + +#ifdef CONFIG_ARCH_TEGRA_2x_SOC +void tegra20_init_speedo_data(struct tegra_sku_info *sku_info, + struct device *dev); +bool tegra20_spare_fuse(int bit); +#else +static inline void tegra20_init_speedo_data(struct tegra_sku_info *sku_info, + struct device *dev) {} +static inline bool tegra20_spare_fuse(int bit) {} +#endif + +#ifdef CONFIG_ARCH_TEGRA_3x_SOC +void tegra30_init_speedo_data(struct tegra_sku_info *sku_info, + struct device *dev); +#else +static inline void tegra30_init_speedo_data(struct tegra_sku_info *sku_info, + struct device *dev) {} +#endif + +#ifdef CONFIG_ARCH_TEGRA_114_SOC +void tegra114_init_speedo_data(struct tegra_sku_info *sku_info, + struct device *dev); +#else +static inline void tegra114_init_speedo_data(struct tegra_sku_info *sku_info, + struct device *dev) {} +#endif + +#ifdef CONFIG_ARCH_TEGRA_124_SOC +void tegra124_init_speedo_data(struct tegra_sku_info *sku_info, + struct device *dev); +#else +static inline void tegra124_init_speedo_data(struct tegra_sku_info *sku_info, + struct device *dev) {} +#endif + +#endif diff --git a/drivers/misc/fuse/tegra/tegra114_speedo.c b/drivers/misc/fuse/tegra/tegra114_speedo.c new file mode 100644 index 0000000..aee9001 --- /dev/null +++ b/drivers/misc/fuse/tegra/tegra114_speedo.c @@ -0,0 +1,109 @@ +/* + * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/bug.h> + +#include "fuse.h" + +#define CORE_PROCESS_CORNERS_NUM 2 +#define CPU_PROCESS_CORNERS_NUM 2 + +enum { + THRESHOLD_INDEX_0, + THRESHOLD_INDEX_1, + THRESHOLD_INDEX_COUNT, +}; + +static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = { + {1123, UINT_MAX}, + {0, UINT_MAX}, +}; + +static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = { + {1695, UINT_MAX}, + {0, UINT_MAX}, +}; + +static void rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info, + int *threshold, struct device *dev) +{ + u32 tmp; + u32 sku = sku_info->sku_id; + enum tegra_revision rev = sku_info->revision; + + switch (sku) { + case 0x00: + case 0x10: + case 0x05: + case 0x06: + sku_info->cpu_speedo_id = 1; + sku_info->soc_speedo_id = 0; + *threshold = THRESHOLD_INDEX_0; + break; + + case 0x03: + case 0x04: + sku_info->cpu_speedo_id = 2; + sku_info->soc_speedo_id = 1; + *threshold = THRESHOLD_INDEX_1; + break; + + default: + dev_err(dev, "Unknown SKU %d\n", sku); + sku_info->cpu_speedo_id = 0; + sku_info->soc_speedo_id = 0; + *threshold = THRESHOLD_INDEX_0; + break; + } + + if (rev == TEGRA_REVISION_A01) { + tmp = tegra30_fuse_readl(0x270) << 1; + tmp |= tegra30_fuse_readl(0x26c); + if (!tmp) + sku_info->cpu_speedo_id = 0; + } +} + +void tegra114_init_speedo_data(struct tegra_sku_info *sku_info, + struct device *dev) +{ + u32 cpu_speedo_val; + u32 core_speedo_val; + int threshold; + int i; + + BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != + THRESHOLD_INDEX_COUNT); + BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != + THRESHOLD_INDEX_COUNT); + + rev_sku_to_speedo_ids(sku_info, &threshold, dev); + + cpu_speedo_val = tegra30_fuse_readl(0x12c) + 1024; + core_speedo_val = tegra30_fuse_readl(0x134); + + for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++) + if (cpu_speedo_val < cpu_process_speedos[threshold][i]) + break; + sku_info->cpu_process_id = i; + + for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++) + if (core_speedo_val < core_process_speedos[threshold][i]) + break; + sku_info->core_process_id = i; +} diff --git a/drivers/misc/fuse/tegra/tegra124_speedo.c b/drivers/misc/fuse/tegra/tegra124_speedo.c new file mode 100644 index 0000000..927b191 --- /dev/null +++ b/drivers/misc/fuse/tegra/tegra124_speedo.c @@ -0,0 +1,164 @@ +/* + * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/bug.h> +#include <linux/tegra-soc.h> + +#include "fuse.h" + +#define CPU_PROCESS_CORNERS_NUM 2 +#define GPU_PROCESS_CORNERS_NUM 2 +#define CORE_PROCESS_CORNERS_NUM 2 + +#define FUSE_CPU_SPEEDO_0 0x14 +#define FUSE_CPU_SPEEDO_1 0x2c +#define FUSE_CPU_SPEEDO_2 0x30 +#define FUSE_SOC_SPEEDO_0 0x34 +#define FUSE_SOC_SPEEDO_1 0x38 +#define FUSE_SOC_SPEEDO_2 0x3c +#define FUSE_CPU_IDDQ 0x18 +#define FUSE_SOC_IDDQ 0x40 +#define FUSE_GPU_IDDQ 0x128 +#define FUSE_FT_REV 0x28 + +enum { + THRESHOLD_INDEX_0, + THRESHOLD_INDEX_1, + THRESHOLD_INDEX_COUNT, +}; + +static int cpu_speedo_0_value; +static int cpu_speedo_1_value; +static int soc_speedo_0_value; +static int soc_speedo_1_value; +static int soc_speedo_2_value; +static int cpu_iddq_value; +static int gpu_iddq_value; +static int soc_iddq_value; + +static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = { + {2190, UINT_MAX}, + {0, UINT_MAX}, +}; + +static const u32 gpu_process_speedos[][GPU_PROCESS_CORNERS_NUM] = { + {1965, UINT_MAX}, + {0, UINT_MAX}, +}; + +static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = { + {2101, UINT_MAX}, + {0, UINT_MAX}, +}; + +static void rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info, + int *threshold, struct device *dev) +{ + int sku = sku_info->sku_id; + + /* Assign to default */ + sku_info->cpu_speedo_id = 0; + sku_info->soc_speedo_id = 0; + sku_info->gpu_speedo_id = 0; + *threshold = THRESHOLD_INDEX_0; + + switch (sku) { + case 0x00: /* Eng sku */ + case 0x0F: + /* Using the default */ + break; + + case 0x81: + case 0x83: + sku_info->cpu_speedo_id = 2; + break; + + case 0x07: + sku_info->cpu_speedo_id = 1; + sku_info->soc_speedo_id = 1; + sku_info->gpu_speedo_id = 1; + *threshold = THRESHOLD_INDEX_1; + break; + + default: + dev_err(dev, "Unknown SKU %d\n", sku); + /* Using the default for the error case */ + break; + } +} + +void tegra124_init_speedo_data(struct tegra_sku_info *sku_info, + struct device *dev) +{ + int i; + int threshold; + + BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != + THRESHOLD_INDEX_COUNT); + BUILD_BUG_ON(ARRAY_SIZE(gpu_process_speedos) != + THRESHOLD_INDEX_COUNT); + BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != + THRESHOLD_INDEX_COUNT); + + cpu_speedo_0_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_0); + cpu_speedo_1_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_1); + + /* GPU Speedo is stored in CPU_SPEEDO_2 */ + sku_info->gpu_speedo_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_2); + + soc_speedo_0_value = tegra30_fuse_readl(FUSE_SOC_SPEEDO_0); + soc_speedo_1_value = tegra30_fuse_readl(FUSE_SOC_SPEEDO_1); + soc_speedo_2_value = tegra30_fuse_readl(FUSE_SOC_SPEEDO_2); + + cpu_iddq_value = tegra30_fuse_readl(FUSE_CPU_IDDQ); + soc_iddq_value = tegra30_fuse_readl(FUSE_SOC_IDDQ); + gpu_iddq_value = tegra30_fuse_readl(FUSE_GPU_IDDQ); + + sku_info->cpu_speedo_value = cpu_speedo_0_value; + + if (sku_info->cpu_speedo_value == 0) { + dev_warn(dev, "Warning: Speedo value not fused.\n"); + WARN_ON(1); + return; + } + + rev_sku_to_speedo_ids(sku_info, &threshold, dev); + + sku_info->cpu_iddq_value = tegra30_fuse_readl(FUSE_CPU_IDDQ); + + for (i = 0; i < GPU_PROCESS_CORNERS_NUM; i++) + if (sku_info->gpu_speedo_value < + gpu_process_speedos[threshold][i]) + break; + sku_info->gpu_process_id = i; + + for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++) + if (sku_info->cpu_speedo_value < + cpu_process_speedos[threshold][i]) + break; + sku_info->cpu_process_id = i; + + for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++) + if (soc_speedo_0_value < + core_process_speedos[threshold][i]) + break; + sku_info->core_process_id = i; + + dev_dbg(dev, "GPU Speedo ID=%d, Speedo Value=%d\n", + sku_info->gpu_speedo_id, sku_info->gpu_speedo_value); +} diff --git a/drivers/misc/fuse/tegra/tegra20_speedo.c b/drivers/misc/fuse/tegra/tegra20_speedo.c new file mode 100644 index 0000000..fe9a995 --- /dev/null +++ b/drivers/misc/fuse/tegra/tegra20_speedo.c @@ -0,0 +1,109 @@ +/* + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/bug.h> + +#include "fuse.h" + +#define CPU_SPEEDO_LSBIT 20 +#define CPU_SPEEDO_MSBIT 29 +#define CPU_SPEEDO_REDUND_LSBIT 30 +#define CPU_SPEEDO_REDUND_MSBIT 39 +#define CPU_SPEEDO_REDUND_OFFS (CPU_SPEEDO_REDUND_MSBIT - CPU_SPEEDO_MSBIT) + +#define CORE_SPEEDO_LSBIT 40 +#define CORE_SPEEDO_MSBIT 47 +#define CORE_SPEEDO_REDUND_LSBIT 48 +#define CORE_SPEEDO_REDUND_MSBIT 55 +#define CORE_SPEEDO_REDUND_OFFS (CORE_SPEEDO_REDUND_MSBIT - CORE_SPEEDO_MSBIT) + +#define SPEEDO_MULT 4 + +#define PROCESS_CORNERS_NUM 4 + +#define SPEEDO_ID_SELECT_0(rev) ((rev) <= 2) +#define SPEEDO_ID_SELECT_1(sku) \ + (((sku) != 20) && ((sku) != 23) && ((sku) != 24) && \ + ((sku) != 27) && ((sku) != 28)) + +enum { + SPEEDO_ID_0, + SPEEDO_ID_1, + SPEEDO_ID_2, + SPEEDO_ID_COUNT, +}; + +static const u32 cpu_process_speedos[][PROCESS_CORNERS_NUM] = { + {315, 366, 420, UINT_MAX}, + {303, 368, 419, UINT_MAX}, + {316, 331, 383, UINT_MAX}, +}; + +static const u32 core_process_speedos[][PROCESS_CORNERS_NUM] = { + {165, 195, 224, UINT_MAX}, + {165, 195, 224, UINT_MAX}, + {165, 195, 224, UINT_MAX}, +}; + +void tegra20_init_speedo_data(struct tegra_sku_info *sku_info, + struct device *dev) +{ + u32 reg; + u32 val; + int i; + + BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != SPEEDO_ID_COUNT); + BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != SPEEDO_ID_COUNT); + + if (SPEEDO_ID_SELECT_0(sku_info->revision)) + sku_info->soc_speedo_id = SPEEDO_ID_0; + else if (SPEEDO_ID_SELECT_1(sku_info->sku_id)) + sku_info->soc_speedo_id = SPEEDO_ID_1; + else + sku_info->soc_speedo_id = SPEEDO_ID_2; + + val = 0; + for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) { + reg = tegra20_spare_fuse(i) | + tegra20_spare_fuse(i + CPU_SPEEDO_REDUND_OFFS); + val = (val << 1) | (reg & 0x1); + } + val = val * SPEEDO_MULT; + dev_dbg(dev, "CPU speedo value %u\n", val); + + for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) { + if (val <= cpu_process_speedos[sku_info->soc_speedo_id][i]) + break; + } + sku_info->cpu_process_id = i; + + val = 0; + for (i = CORE_SPEEDO_MSBIT; i >= CORE_SPEEDO_LSBIT; i--) { + reg = tegra20_spare_fuse(i) | + tegra20_spare_fuse(i + CORE_SPEEDO_REDUND_OFFS); + val = (val << 1) | (reg & 0x1); + } + val = val * SPEEDO_MULT; + dev_dbg(dev, "Core speedo value %u\n", val); + + for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) { + if (val <= core_process_speedos[sku_info->soc_speedo_id][i]) + break; + } + sku_info->core_process_id = i; +} diff --git a/drivers/misc/fuse/tegra/tegra30_speedo.c b/drivers/misc/fuse/tegra/tegra30_speedo.c new file mode 100644 index 0000000..f72832e --- /dev/null +++ b/drivers/misc/fuse/tegra/tegra30_speedo.c @@ -0,0 +1,293 @@ +/* + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/bug.h> + +#include "fuse.h" + +#define CORE_PROCESS_CORNERS_NUM 1 +#define CPU_PROCESS_CORNERS_NUM 6 + +#define FUSE_SPEEDO_CALIB_0 0x14 +#define FUSE_PACKAGE_INFO 0XFC +#define FUSE_TEST_PROG_VER 0X28 + +#define G_SPEEDO_BIT_MINUS1 58 +#define G_SPEEDO_BIT_MINUS1_R 59 +#define G_SPEEDO_BIT_MINUS2 60 +#define G_SPEEDO_BIT_MINUS2_R 61 +#define LP_SPEEDO_BIT_MINUS1 62 +#define LP_SPEEDO_BIT_MINUS1_R 63 +#define LP_SPEEDO_BIT_MINUS2 64 +#define LP_SPEEDO_BIT_MINUS2_R 65 + +enum { + THRESHOLD_INDEX_0, + THRESHOLD_INDEX_1, + THRESHOLD_INDEX_2, + THRESHOLD_INDEX_3, + THRESHOLD_INDEX_4, + THRESHOLD_INDEX_5, + THRESHOLD_INDEX_6, + THRESHOLD_INDEX_7, + THRESHOLD_INDEX_8, + THRESHOLD_INDEX_9, + THRESHOLD_INDEX_10, + THRESHOLD_INDEX_11, + THRESHOLD_INDEX_COUNT, +}; + +static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = { + {180}, + {170}, + {195}, + {180}, + {168}, + {192}, + {180}, + {170}, + {195}, + {180}, + {180}, + {180}, +}; + +static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = { + {306, 338, 360, 376, UINT_MAX}, + {295, 336, 358, 375, UINT_MAX}, + {325, 325, 358, 375, UINT_MAX}, + {325, 325, 358, 375, UINT_MAX}, + {292, 324, 348, 364, UINT_MAX}, + {324, 324, 348, 364, UINT_MAX}, + {324, 324, 348, 364, UINT_MAX}, + {295, 336, 358, 375, UINT_MAX}, + {358, 358, 358, 358, 397, UINT_MAX}, + {364, 364, 364, 364, 397, UINT_MAX}, + {295, 336, 358, 375, 391, UINT_MAX}, + {295, 336, 358, 375, 391, UINT_MAX}, +}; + +static int threshold_index; +static int package_id; + +static void fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp, + struct device *dev) +{ + u32 reg; + int ate_ver; + int bit_minus1; + int bit_minus2; + + reg = tegra30_fuse_readl(FUSE_SPEEDO_CALIB_0); + + *speedo_lp = (reg & 0xFFFF) * 4; + *speedo_g = ((reg >> 16) & 0xFFFF) * 4; + + ate_ver = tegra30_fuse_readl(FUSE_TEST_PROG_VER); + dev_dbg(dev, "ATE prog ver %d.%d\n", ate_ver/10, ate_ver%10); + + if (ate_ver >= 26) { + bit_minus1 = tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS1); + bit_minus1 |= tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS1_R); + bit_minus2 = tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS2); + bit_minus2 |= tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS2_R); + *speedo_lp |= (bit_minus1 << 1) | bit_minus2; + + bit_minus1 = tegra30_spare_fuse(G_SPEEDO_BIT_MINUS1); + bit_minus1 |= tegra30_spare_fuse(G_SPEEDO_BIT_MINUS1_R); + bit_minus2 = tegra30_spare_fuse(G_SPEEDO_BIT_MINUS2); + bit_minus2 |= tegra30_spare_fuse(G_SPEEDO_BIT_MINUS2_R); + *speedo_g |= (bit_minus1 << 1) | bit_minus2; + } else { + *speedo_lp |= 0x3; + *speedo_g |= 0x3; + } +} + +static void rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info, + struct device *dev) +{ + switch (sku_info->revision) { + case TEGRA_REVISION_A01: + sku_info->cpu_speedo_id = 0; + sku_info->soc_speedo_id = 0; + threshold_index = THRESHOLD_INDEX_0; + break; + case TEGRA_REVISION_A02: + case TEGRA_REVISION_A03: + switch (sku_info->sku_id) { + case 0x87: + case 0x82: + sku_info->cpu_speedo_id = 1; + sku_info->soc_speedo_id = 1; + threshold_index = THRESHOLD_INDEX_1; + break; + case 0x81: + switch (package_id) { + case 1: + sku_info->cpu_speedo_id = 2; + sku_info->soc_speedo_id = 2; + threshold_index = THRESHOLD_INDEX_2; + break; + case 2: + sku_info->cpu_speedo_id = 4; + sku_info->soc_speedo_id = 1; + threshold_index = THRESHOLD_INDEX_7; + break; + default: + dev_err(dev, "Unknown pkg %d\n", package_id); + BUG(); + break; + } + break; + case 0x80: + switch (package_id) { + case 1: + sku_info->cpu_speedo_id = 5; + sku_info->soc_speedo_id = 2; + threshold_index = THRESHOLD_INDEX_8; + break; + case 2: + sku_info->cpu_speedo_id = 6; + sku_info->soc_speedo_id = 2; + threshold_index = THRESHOLD_INDEX_9; + break; + default: + dev_err(dev, "Unknown pkg %d\n", package_id); + BUG(); + break; + } + break; + case 0x83: + switch (package_id) { + case 1: + sku_info->cpu_speedo_id = 7; + sku_info->soc_speedo_id = 1; + threshold_index = THRESHOLD_INDEX_10; + break; + case 2: + sku_info->cpu_speedo_id = 3; + sku_info->soc_speedo_id = 2; + threshold_index = THRESHOLD_INDEX_3; + break; + default: + dev_err(dev, "Unknown pkg %d\n", package_id); + BUG(); + break; + } + break; + case 0x8F: + sku_info->cpu_speedo_id = 8; + sku_info->soc_speedo_id = 1; + threshold_index = THRESHOLD_INDEX_11; + break; + case 0x08: + sku_info->cpu_speedo_id = 1; + sku_info->soc_speedo_id = 1; + threshold_index = THRESHOLD_INDEX_4; + break; + case 0x02: + sku_info->cpu_speedo_id = 2; + sku_info->soc_speedo_id = 2; + threshold_index = THRESHOLD_INDEX_5; + break; + case 0x04: + sku_info->cpu_speedo_id = 3; + sku_info->soc_speedo_id = 2; + threshold_index = THRESHOLD_INDEX_6; + break; + case 0: + switch (package_id) { + case 1: + sku_info->cpu_speedo_id = 2; + sku_info->soc_speedo_id = 2; + threshold_index = THRESHOLD_INDEX_2; + break; + case 2: + sku_info->cpu_speedo_id = 3; + sku_info->soc_speedo_id = 2; + threshold_index = THRESHOLD_INDEX_3; + break; + default: + dev_err(dev, "Unknown pkg %d\n", package_id); + BUG(); + break; + } + break; + default: + dev_warn(dev, "Unknown SKU %d\n", sku_info->sku_id); + sku_info->cpu_speedo_id = 0; + sku_info->soc_speedo_id = 0; + threshold_index = THRESHOLD_INDEX_0; + break; + } + break; + default: + dev_warn(dev, "Unknown chip rev %d\n", sku_info->revision); + sku_info->cpu_speedo_id = 0; + sku_info->soc_speedo_id = 0; + threshold_index = THRESHOLD_INDEX_0; + break; + } +} + +void tegra30_init_speedo_data(struct tegra_sku_info *sku_info, + struct device *dev) +{ + u32 cpu_speedo_val; + u32 core_speedo_val; + int i; + + BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != + THRESHOLD_INDEX_COUNT); + BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != + THRESHOLD_INDEX_COUNT); + + package_id = tegra30_fuse_readl(FUSE_PACKAGE_INFO) & 0x0F; + + rev_sku_to_speedo_ids(sku_info, dev); + fuse_speedo_calib(&cpu_speedo_val, &core_speedo_val, dev); + dev_dbg(dev, "CPU speedo value %u\n", cpu_speedo_val); + dev_dbg(dev, "Core speedo value %u\n", core_speedo_val); + + for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++) { + if (cpu_speedo_val < cpu_process_speedos[threshold_index][i]) + break; + } + sku_info->cpu_process_id = i - 1; + + if (sku_info->cpu_process_id == -1) { + dev_warn(dev, "CPU speedo value %3d out of range", + cpu_speedo_val); + sku_info->cpu_process_id = 0; + sku_info->cpu_speedo_id = 1; + } + + for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++) { + if (core_speedo_val < core_process_speedos[threshold_index][i]) + break; + } + sku_info->core_process_id = i - 1; + + if (sku_info->core_process_id == -1) { + dev_warn(dev, "CORE speedo value %3d out of range", + core_speedo_val); + sku_info->core_process_id = 0; + sku_info->soc_speedo_id = 1; + } +} -- 1.7.7.rc0.72.g4b5ea.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
