diff options
| -rw-r--r-- | arch/arm/mach-tegra/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/common.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/fuse-cache.c | 124 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/include/mach/fuse.h | 25 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/sysfs-fuse.c | 32 |
5 files changed, 184 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile index fd2d7e7bdb7b..4ac66f080964 100644 --- a/arch/arm/mach-tegra/Makefile +++ b/arch/arm/mach-tegra/Makefile @@ -20,6 +20,7 @@ obj-y += platsmp.o localtimer.o headsmp.o obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += headsmp-t2.o endif obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_save.o +obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += fuse-cache.o obj-$(CONFIG_MACH_TEGRA_GENERIC) += board-generic.o obj-$(CONFIG_CPU_FREQ) += cpufreq.o obj-$(CONFIG_CPU_IDLE) += cpuidle.o diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c index 85b61f337e3e..0d26f87b8e8b 100644 --- a/arch/arm/mach-tegra/common.c +++ b/arch/arm/mach-tegra/common.c @@ -28,6 +28,7 @@ #include <mach/iomap.h> #include <mach/dma.h> +#include <mach/fuse.h> #include "board.h" @@ -120,6 +121,7 @@ void __init tegra_common_init(void) "iram", NVMEM_HEAP_CARVEOUT_IRAM); tegra_init_clock(); tegra_init_cache(); + tegra_init_fuse_cache(); tegra_dma_init(); tegra_mc_init(); arm_pm_restart = tegra_machine_restart; diff --git a/arch/arm/mach-tegra/fuse-cache.c b/arch/arm/mach-tegra/fuse-cache.c new file mode 100644 index 000000000000..1e994fb48b40 --- /dev/null +++ b/arch/arm/mach-tegra/fuse-cache.c @@ -0,0 +1,124 @@ +/* + * arch/arm/mach-tegra/fuse-cache.c + * + * Interface to kfuses on Tegra 200 + * + * Copyright (c) 2010, NVIDIA Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/string.h> +#include <linux/io.h> +#include <linux/mm.h> +#include <mach/fuse.h> +#include <mach/iomap.h> +#include <ap20/arclk_rst.h> +#include <ap20/arfuse.h> + +/* register definition */ +#define KFUSE_STATE 0x80 +#define KFUSE_STATE_DONE 0x10000 +#define KFUSE_STATE_CRCPASS 0x20000 +#define KFUSE_KEYADDR 0x88 +#define KFUSE_KEYADDR_AUTOINC 0x10000 +#define KFUSE_KEYADDR_ADDR(addr) (addr) +#define KFUSE_KEYS 0x8c + +#define KFUSE_CACHE_SZ (144 * 4) + +static u32 *kfuse_cache; +static int kfuse_cache_isvalid; + +/* set start address in auto-increment mode */ +static inline void kfuse_set_autoinc_addr(u16 addr) +{ + writel(KFUSE_KEYADDR_ADDR(0) | KFUSE_KEYADDR_AUTOINC, + IO_ADDRESS(TEGRA_KFUSE_BASE) + KFUSE_KEYADDR); +} + +static inline void kfuse_clock_enable(int e) +{ + if (e) { + writel(CLK_RST_CONTROLLER_CLK_ENB_H_SET_0_SET_CLK_ENB_KFUSE_FIELD, + IO_ADDRESS(TEGRA_CLK_RESET_BASE + + CLK_RST_CONTROLLER_CLK_ENB_H_SET_0)); + } else { + writel(CLK_RST_CONTROLLER_CLK_ENB_H_CLR_0_CLR_CLK_ENB_KFUSE_FIELD, + IO_ADDRESS(TEGRA_CLK_RESET_BASE + + CLK_RST_CONTROLLER_CLK_ENB_H_CLR_0)); + } +} + +static void kfuse_wait_ready(void) +{ + int retries = 1; + /* wait for hardware to finish loading and verifying key data */ + do { + u32 val; + val = readl(IO_ADDRESS(TEGRA_KFUSE_BASE) + KFUSE_STATE); + if ((val & KFUSE_STATE_DONE) == KFUSE_STATE_DONE) { + /* hardware does CRC check */ + kfuse_cache_isvalid = (val & KFUSE_STATE_CRCPASS) == KFUSE_STATE_CRCPASS; + break; + } + msleep(10); + } while( --retries >= 0 ); +} + +static void kfuse_rewind(void) +{ + /* force HW to decode and check fuses if it has not already done so */ + kfuse_set_autoinc_addr(0); + kfuse_wait_ready(); + // kfuse_set_autoinc_addr(0); +} + +static inline u32 kfuse_read(void) +{ + return readl(IO_ADDRESS(TEGRA_KFUSE_BASE) + KFUSE_KEYS); +} + +/* this is called very early in init because there is a bug that can cause + * corruption if DMA and non-DMA requests overlap on APB bus. */ +void __init tegra_init_fuse_cache(void) { + unsigned i; + + kfuse_cache = kzalloc(KFUSE_CACHE_SZ, GFP_KERNEL); + + kfuse_clock_enable(1); + + kfuse_rewind(); + + printk(KERN_DEBUG "kfuse_cache_isvalid=%d\n", kfuse_cache_isvalid); + + if (!kfuse_cache_isvalid) { + printk(KERN_ERR "kfuse CRC or ECC error\n"); + } else { + /* load if no CRC or ECC errors */ + for (i = 0; i < KFUSE_CACHE_SZ / sizeof (u32); i ++) + kfuse_cache[i] = kfuse_read(); + } + + kfuse_clock_enable(0); +} + +const u32 *tegra_kfuse_cache_get(size_t *size) { + if (size) *size = KFUSE_CACHE_SZ; + return kfuse_cache; +} diff --git a/arch/arm/mach-tegra/include/mach/fuse.h b/arch/arm/mach-tegra/include/mach/fuse.h new file mode 100644 index 000000000000..3a4f71e46b94 --- /dev/null +++ b/arch/arm/mach-tegra/include/mach/fuse.h @@ -0,0 +1,25 @@ +/* + * arch/arm/mach-tegra/fuse.h + * + * Copyright (c) 2010, NVIDIA Corporation. + * + * 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 __MACH_TEGRA_FUSE_H +#define __MACH_TEGRA_FUSE_H + +#include <linux/init.h> + +void __init tegra_init_fuse_cache(void); +const u32 *tegra_kfuse_cache_get(size_t *size); + +#endif diff --git a/arch/arm/mach-tegra/sysfs-fuse.c b/arch/arm/mach-tegra/sysfs-fuse.c index d32d098972ab..d2a6c2b0bb04 100644 --- a/arch/arm/mach-tegra/sysfs-fuse.c +++ b/arch/arm/mach-tegra/sysfs-fuse.c @@ -34,6 +34,8 @@ #include <linux/kernel.h> #include <linux/sysfs.h> #include <linux/kobject.h> +#include <linux/mm.h> +#include <mach/fuse.h> #include "nvddk_fuse.h" #include "mach/nvrm_linux.h" @@ -67,6 +69,12 @@ typedef enum } TegraFuseSizeInBytes; +static ssize_t nvfuse_raw_read(struct kobject *kobj, + struct bin_attribute *attr, char *buf, loff_t off, size_t count); + +static int nvfuse_raw_mmap(struct kobject *kobj, + struct bin_attribute *attr, struct vm_area_struct *vma); + static ssize_t sysfsfuse_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf); @@ -74,6 +82,15 @@ static ssize_t sysfsfuse_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count); +static struct bin_attribute nvfuse_raw_attr = { + .attr = { + .name = "kfuse_raw", + .mode = 0440, + }, + .read = &nvfuse_raw_read, + .mmap = &nvfuse_raw_mmap, +}; + static struct kobj_attribute nvfuse_DeviceKey_attr = __ATTR(DeviceKey, 0440, sysfsfuse_show, sysfsfuse_store); @@ -113,7 +130,20 @@ static struct kobj_attribute nvfuse_SecBootDeviceSelectRaw_attr = static struct kobj_attribute nvfuse_ReservedOdm_attr = __ATTR(ReservedOdm, 0440, sysfsfuse_show, sysfsfuse_store); +static ssize_t nvfuse_raw_read(struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t count) +{ + memcpy(buf, attr->private + off, count); + return count; +} +static int nvfuse_raw_mmap(struct kobject *kobj, struct bin_attribute *attr, struct vm_area_struct *vma) +{ + if(remap_pfn_range(vma, vma->vm_start, virt_to_phys(attr->private) >> PAGE_SHIFT, attr->size, vma->vm_page_prot)) { + printk(KERN_ERR "nvfuse_raw_mmap failed\n"); + return -EIO; + } + return 0; +} // return the fuse type based on the fuse name. NvDdkFuseDataType GetFuseType(const char *str, unsigned int* pSize) @@ -441,6 +471,8 @@ static int __init sysfsfuse_init(void) sysfs_chmod_file(nvfuse_kobj, &nvfuse_OdmProduction_attr.attr, 0640); } + nvfuse_raw_attr.private = tegra_kfuse_cache_get(&nvfuse_raw_attr.size); + CHK_ERR(sysfs_create_bin_file(nvfuse_kobj, &nvfuse_raw_attr)); CHK_ERR(sysfs_create_file(nvfuse_kobj, &nvfuse_DeviceKey_attr.attr)); CHK_ERR(sysfs_create_file(nvfuse_kobj, &nvfuse_JtagDisable_attr.attr)); CHK_ERR(sysfs_create_file(nvfuse_kobj, &nvfuse_KeyProgrammed_attr.attr)); |