Loading drivers/soc/qcom/Kconfig +6 −0 Original line number Diff line number Diff line Loading @@ -887,6 +887,12 @@ config SERIAL_NUM help Provide a interface for reading CPU serial number config SECBOOT_FUSE bool "Enable Secure boot fuse Proc Interface" help Provide a interface for reading CPU secure boot fuse setting. Interface located in /proc/secboot_fuse_reg source "drivers/soc/qcom/memshare/Kconfig" endif # ARCH_MSM drivers/soc/qcom/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -108,3 +108,4 @@ obj-$(CONFIG_QCOM_SMCINVOKE) += smcinvoke.o obj-$(CONFIG_QCOM_EARLY_RANDOM) += early_random.o obj-$(CONFIG_MSM_HAB) += hab/ obj-$(CONFIG_SERIAL_NUM) += serial_num.o obj-$(CONFIG_SECBOOT_FUSE) += secboot_fuse.o drivers/soc/qcom/secboot_fuse.c 0 → 100644 +121 −0 Original line number Diff line number Diff line #include <linux/kernel.h> #include <linux/module.h> #include <linux/export.h> #include <linux/init.h> #include <linux/device.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/proc_fs.h> #include <asm/uaccess.h> #define secboot_fuse_readl(drvdata, off) __raw_readl(drvdata->base + off) #define SECBOOT_FUSE (0x000) static uint32_t secboot_fuse; struct secboot_fuse_drvdata { void __iomem *base; struct device *dev; }; static struct secboot_fuse_drvdata *secdrvdata; static int secboot_fuse_read(struct seq_file *m, void *v) { struct secboot_fuse_drvdata *drvdata = secdrvdata; if (!drvdata) return false; if (secboot_fuse == 0) secboot_fuse = secboot_fuse_readl(drvdata, SECBOOT_FUSE); dev_dbg(drvdata->dev, "secboot register: %x\n", secboot_fuse); seq_printf(m, "0x%x\n", secboot_fuse); return 0; } static int secboot_proc_open(struct inode *inode, struct file *file) { return single_open(file, secboot_fuse_read, NULL); } static const struct file_operations secboot_fops = { .open = secboot_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static void secboot_fuse_create_proc(void) { struct proc_dir_entry *entry; entry = proc_create("secboot_fuse_reg", 0 /* default mode */, NULL /* parent dir */, &secboot_fops); } static int secboot_fuse_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct secboot_fuse_drvdata *drvdata; struct resource *res; drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); if (!drvdata) return -ENOMEM; /* Store the driver data pointer for use in exported functions */ secdrvdata = drvdata; drvdata->dev = &pdev->dev; platform_set_drvdata(pdev, drvdata); res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sec-boot-base"); if (!res) return -ENODEV; drvdata->base = devm_ioremap(dev, res->start, resource_size(res)); if (!drvdata->base) return -ENOMEM; secboot_fuse_create_proc(); dev_info(dev, "Secboot-fuse interface initialized\n"); return 0; } static int secboot_fuse_remove(struct platform_device *pdev) { return 0; } static struct of_device_id secboot_fuse_match[] = { {.compatible = "qcom,sec-boot-fuse"}, {} }; static struct platform_driver secboot_fuse_driver = { .probe = secboot_fuse_probe, .remove = secboot_fuse_remove, .driver = { .name = "msm-secboot-fuse", .owner = THIS_MODULE, .of_match_table = secboot_fuse_match, }, }; static int __init secboot_fuse_init(void) { return platform_driver_register(&secboot_fuse_driver); } arch_initcall(secboot_fuse_init); static void __exit secboot_fuse_exit(void) { platform_driver_unregister(&secboot_fuse_driver); } module_exit(secboot_fuse_exit); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("JTag Fuse driver"); Loading
drivers/soc/qcom/Kconfig +6 −0 Original line number Diff line number Diff line Loading @@ -887,6 +887,12 @@ config SERIAL_NUM help Provide a interface for reading CPU serial number config SECBOOT_FUSE bool "Enable Secure boot fuse Proc Interface" help Provide a interface for reading CPU secure boot fuse setting. Interface located in /proc/secboot_fuse_reg source "drivers/soc/qcom/memshare/Kconfig" endif # ARCH_MSM
drivers/soc/qcom/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -108,3 +108,4 @@ obj-$(CONFIG_QCOM_SMCINVOKE) += smcinvoke.o obj-$(CONFIG_QCOM_EARLY_RANDOM) += early_random.o obj-$(CONFIG_MSM_HAB) += hab/ obj-$(CONFIG_SERIAL_NUM) += serial_num.o obj-$(CONFIG_SECBOOT_FUSE) += secboot_fuse.o
drivers/soc/qcom/secboot_fuse.c 0 → 100644 +121 −0 Original line number Diff line number Diff line #include <linux/kernel.h> #include <linux/module.h> #include <linux/export.h> #include <linux/init.h> #include <linux/device.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/proc_fs.h> #include <asm/uaccess.h> #define secboot_fuse_readl(drvdata, off) __raw_readl(drvdata->base + off) #define SECBOOT_FUSE (0x000) static uint32_t secboot_fuse; struct secboot_fuse_drvdata { void __iomem *base; struct device *dev; }; static struct secboot_fuse_drvdata *secdrvdata; static int secboot_fuse_read(struct seq_file *m, void *v) { struct secboot_fuse_drvdata *drvdata = secdrvdata; if (!drvdata) return false; if (secboot_fuse == 0) secboot_fuse = secboot_fuse_readl(drvdata, SECBOOT_FUSE); dev_dbg(drvdata->dev, "secboot register: %x\n", secboot_fuse); seq_printf(m, "0x%x\n", secboot_fuse); return 0; } static int secboot_proc_open(struct inode *inode, struct file *file) { return single_open(file, secboot_fuse_read, NULL); } static const struct file_operations secboot_fops = { .open = secboot_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static void secboot_fuse_create_proc(void) { struct proc_dir_entry *entry; entry = proc_create("secboot_fuse_reg", 0 /* default mode */, NULL /* parent dir */, &secboot_fops); } static int secboot_fuse_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct secboot_fuse_drvdata *drvdata; struct resource *res; drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); if (!drvdata) return -ENOMEM; /* Store the driver data pointer for use in exported functions */ secdrvdata = drvdata; drvdata->dev = &pdev->dev; platform_set_drvdata(pdev, drvdata); res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sec-boot-base"); if (!res) return -ENODEV; drvdata->base = devm_ioremap(dev, res->start, resource_size(res)); if (!drvdata->base) return -ENOMEM; secboot_fuse_create_proc(); dev_info(dev, "Secboot-fuse interface initialized\n"); return 0; } static int secboot_fuse_remove(struct platform_device *pdev) { return 0; } static struct of_device_id secboot_fuse_match[] = { {.compatible = "qcom,sec-boot-fuse"}, {} }; static struct platform_driver secboot_fuse_driver = { .probe = secboot_fuse_probe, .remove = secboot_fuse_remove, .driver = { .name = "msm-secboot-fuse", .owner = THIS_MODULE, .of_match_table = secboot_fuse_match, }, }; static int __init secboot_fuse_init(void) { return platform_driver_register(&secboot_fuse_driver); } arch_initcall(secboot_fuse_init); static void __exit secboot_fuse_exit(void) { platform_driver_unregister(&secboot_fuse_driver); } module_exit(secboot_fuse_exit); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("JTag Fuse driver");
