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381 lines
9.4 KiB
381 lines
9.4 KiB
/*
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* Samsung TZIC Driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#define KMSG_COMPONENT "TZIC"
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#include <linux/printk.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/platform_device.h>
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#include <linux/debugfs.h>
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#include <linux/cdev.h>
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#include <linux/uaccess.h>
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#include <linux/sched.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/io.h>
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#include <linux/types.h>
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#include "tzic.h"
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#ifdef CONFIG_TZDEV
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#include <linux/init.h>
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#include <linux/ioctl.h>
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#include <linux/moduleparam.h>
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#include <linux/miscdevice.h>
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#if defined(CONFIG_TEEGRIS_VERSION) && (CONFIG_TEEGRIS_VERSION >= 4)
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#include "extensions/irs.h"
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#else
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#include "tzirs.h"
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#endif
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#endif /* CONFIG_TZDEV */
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#define TZIC_DEV "tzic"
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#define TZIC_IOC_MAGIC 0x9E
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#define TZIC_IOCTL_GET_FUSE_REQ _IO(TZIC_IOC_MAGIC, 0)
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#define TZIC_IOCTL_SET_FUSE_REQ _IO(TZIC_IOC_MAGIC, 1)
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#define TZIC_IOCTL_SET_FUSE_REQ_DEFAULT _IO(TZIC_IOC_MAGIC, 2)
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#define TZIC_IOCTL_GET_FUSE_REQ_NEW _IO(TZIC_IOC_MAGIC, 10)
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#define TZIC_IOCTL_SET_FUSE_REQ_NEW _IO(TZIC_IOC_MAGIC, 11)
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#ifndef LOG
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#define LOG printk
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#endif
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#ifdef CONFIG_TZIC_USE_QSEECOM
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#define HLOS_IMG_TAMPER_FUSE 0
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#endif /* CONFIG_TZIC_USE_QSEECOM */
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#ifndef CONFIG_TZDEV
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// TZ_IRS_CMD
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enum {
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IRS_SET_FLAG_CMD = 1,
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IRS_SET_FLAG_VALUE_CMD,
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IRS_INC_FLAG_CMD,
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IRS_GET_FLAG_VAL_CMD,
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IRS_ADD_FLAG_CMD,
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IRS_DEL_FLAG_CMD
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};
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#endif //CONFIG_TZDEV
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#if defined(CONFIG_TZIC_USE_TZDEV) || defined(CONFIG_TZIC_USE_TRUSTONIC)
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static int gotoCpu0(void);
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static int gotoAllCpu(void) __attribute__ ((unused));
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#endif
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struct t_flag {
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uint32_t name;
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uint32_t func_cmd;
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uint32_t value;
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};
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static DEFINE_MUTEX(tzic_mutex);
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static struct class *driver_class;
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static dev_t tzic_device_no;
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static struct cdev tzic_cdev;
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/*
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General set flag function, it call function from tzic64_[secureOs].c
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*/
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int tzic_flags_set(enum oemflag_id index)
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{
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int ret = 0;
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uint32_t name = index;
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if (name > OEMFLAG_MIN_FLAG && name < OEMFLAG_NUM_OF_FLAG) {
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ret = tzic_oem_flags_get(name);
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if (ret) {
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LOG(KERN_INFO "[oemflag]flag is already set. %u\n", name);
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return 0;
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}
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LOG(KERN_INFO "[oemflag]set_fuse_name : %u\n", name);
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ret = tzic_oem_flags_set(name);
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if (ret) {
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LOG(KERN_INFO "set_tamper_fuse error: ret=%d\n", ret);
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return 1;
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}
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ret = tzic_oem_flags_get(name);
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if (!ret) {
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LOG(KERN_INFO "get_tamper_fuse error: ret=%d\n", ret);
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return 1;
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}
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} else {
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LOG(KERN_INFO "[oemflag]param name is wrong\n");
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ret = -EINVAL;
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}
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return 0;
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}
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/*
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General get flag function, it call function from tzic64_[secureOs].c
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*/
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int tzic_flags_get(enum oemflag_id index)
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{
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int ret = 0;
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uint32_t name = index;
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LOG(KERN_INFO "[oemflag]get_fuse_name : %u\n", name);
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if (name > OEMFLAG_MIN_FLAG && name < OEMFLAG_NUM_OF_FLAG) {
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ret = tzic_oem_flags_get(name);
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} else {
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LOG(KERN_INFO "[oemflag]param name is wrong\n");
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ret = -EINVAL;
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}
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return ret;
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}
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static long tzic_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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{
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int ret = 0;
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int i;
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struct t_flag param = { 0, 0, 0 };
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#ifdef CONFIG_TZDEV
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if (_IOC_TYPE(cmd) != IOC_MAGIC && _IOC_TYPE(cmd) != TZIC_IOC_MAGIC) {
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LOG(KERN_INFO "[oemflag]INVALID CMD = %d\n", cmd);
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return -ENOTTY;
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}
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#endif /* CONFIG_TZDEV */
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#if defined(CONFIG_TZIC_USE_TZDEV) || defined(CONFIG_TZIC_USE_TRUSTONIC)
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ret = gotoCpu0();
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if (ret != 0) {
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LOG(KERN_INFO "[oemflag]changing core failed!\n");
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return -1;
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}
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#endif
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switch (cmd) {
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#ifdef CONFIG_TZDEV
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case IOCTL_IRS_CMD:
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/* get flag id */
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ret = copy_from_user(¶m, (void *)arg, sizeof(param));
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if (ret != 0) {
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LOG(KERN_INFO "[oemflag]copy_from_user failed, ret = 0x%08x\n", ret);
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break;
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}
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if(param.func_cmd==IRS_SET_FLAG_VALUE_CMD) {
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ret = tzic_flags_set(param.name);
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} else {
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ret = tzic_flags_get(param.name);
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}
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break;
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#endif /* CONFIG_TZDEV */
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#ifdef CONFIG_TZIC_USE_QSEECOM
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case TZIC_IOCTL_GET_FUSE_REQ:
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ret = tzic_flags_get(HLOS_IMG_TAMPER_FUSE);
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LOG(KERN_INFO "[oemflag]tamper_fuse value = %x\n", ret);
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break;
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case TZIC_IOCTL_SET_FUSE_REQ:
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ret = tzic_flags_get(HLOS_IMG_TAMPER_FUSE);
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LOG(KERN_INFO "[oemflag]tamper_fuse before = %x\n", ret);
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mutex_lock(&tzic_mutex);
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ret = tzic_flags_set(HLOS_IMG_TAMPER_FUSE);
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mutex_unlock(&tzic_mutex);
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if (ret)
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LOG(KERN_INFO "[oemflag]failed tzic_set_fuse_cmd: %d\n", ret);
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LOG(KERN_INFO "[oemflag]tamper_fuse after = %x\n", tzic_flags_get(HLOS_IMG_TAMPER_FUSE));
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break;
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#endif //CONFIG_TZIC_USE_QSEECOM
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case TZIC_IOCTL_SET_FUSE_REQ_DEFAULT: //SET ALL OEM FLAG EXCEPT 0
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LOG(KERN_INFO "[oemflag]set_fuse_default\n");
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ret = copy_from_user(¶m, (void *)arg, sizeof(param));
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if (ret) {
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LOG(KERN_INFO "[oemflag]ERROR copy from user\n");
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return ret;
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}
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for (i = OEMFLAG_MIN_FLAG+1; i < OEMFLAG_NUM_OF_FLAG; i++) {
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param.name = i;
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ret = tzic_flags_get(param.name);
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LOG(KERN_INFO "[oemflag]tamper_fuse before = %x\n", ret);
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mutex_lock(&tzic_mutex);
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ret = tzic_flags_set(param.name);
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mutex_unlock(&tzic_mutex);
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if (ret)
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LOG(KERN_INFO "[oemflag]failed tzic_set_fuse_cmd: %d\n", ret);
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ret = tzic_flags_get(param.name);
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LOG(KERN_INFO "[oemflag]tamper_fuse after = %x\n", ret);
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}
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break;
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case TZIC_IOCTL_SET_FUSE_REQ_NEW:
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ret = copy_from_user(¶m, (void *)arg, sizeof(param));
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if (ret) {
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LOG(KERN_INFO "[oemflag]ERROR copy from user\n");
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break;
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}
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if ((param.name > OEMFLAG_MIN_FLAG) && (param.name < OEMFLAG_NUM_OF_FLAG)) {
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ret = tzic_flags_set(param.name);
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} else {
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LOG(KERN_INFO "[oemflag]command error\n");
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ret = -1;
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}
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break;
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case TZIC_IOCTL_GET_FUSE_REQ_NEW:
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LOG(KERN_INFO "[oemflag]get_fuse_new\n");
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ret = copy_from_user(¶m, (void *)arg, sizeof(param));
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if (ret) {
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LOG(KERN_INFO "[oemflag]ERROR copy from user\n");
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break;
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}
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if ((param.name > OEMFLAG_MIN_FLAG) && (param.name < OEMFLAG_NUM_OF_FLAG)) {
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ret = tzic_flags_get(param.name);
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LOG(KERN_INFO "[oemflag]get_oemflag_value : %u\n", ret);
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} else {
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LOG(KERN_INFO "[oemflag]command error\n");
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ret = -1;
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}
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break;
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default:
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LOG(KERN_INFO "[oemflag]default\n");
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ret = copy_from_user(¶m, (void *)arg, sizeof(param));
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if (param.func_cmd == IRS_SET_FLAG_VALUE_CMD) {
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if (ret) {
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LOG(KERN_INFO "[oemflag]ERROR copy from user\n");
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break;
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}
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if ((param.name > OEMFLAG_MIN_FLAG) && (param.name < OEMFLAG_NUM_OF_FLAG)) {
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ret = tzic_flags_set(param.name);
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} else {
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LOG(KERN_INFO "[oemflag]command error\n");
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ret = -1;
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}
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} else if (param.func_cmd == IRS_GET_FLAG_VAL_CMD) {
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LOG(KERN_INFO "[oemflag]get_fuse_new\n");
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if (ret) {
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LOG(KERN_INFO "[oemflag]ERROR copy from user\n");
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break;
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}
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if ((param.name > OEMFLAG_MIN_FLAG) && (param.name < OEMFLAG_NUM_OF_FLAG)) {
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ret = tzic_flags_get(param.name);
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LOG(KERN_INFO "[oemflag]get_oemflag_value : %u\n", ret);
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} else {
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LOG(KERN_INFO "[oemflag]command error\n");
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ret = -1;
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}
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} else {
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LOG(KERN_INFO "[oemflag]command error\n");
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ret = -1;
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}
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}
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#if defined(CONFIG_TZIC_USE_TZDEV) || defined(CONFIG_TZIC_USE_TRUSTONIC)
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gotoAllCpu();
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#endif
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return ret;
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}
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static const struct file_operations tzic_fops = {
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.owner = THIS_MODULE,
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.compat_ioctl = tzic_ioctl,
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.unlocked_ioctl = tzic_ioctl,
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};
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static int __init tzic_init(void)
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{
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int rc;
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struct device *class_dev;
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rc = alloc_chrdev_region(&tzic_device_no, 0, 1, TZIC_DEV);
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if (rc < 0) {
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LOG(KERN_INFO "alloc_chrdev_region failed %d\n", rc);
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return rc;
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}
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driver_class = class_create(THIS_MODULE, TZIC_DEV);
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if (IS_ERR(driver_class)) {
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rc = -ENOMEM;
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LOG(KERN_INFO "class_create failed %d\n", rc);
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goto unregister_chrdev_region;
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}
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class_dev = device_create(driver_class, NULL, tzic_device_no, NULL,
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TZIC_DEV);
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if (!class_dev) {
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LOG(KERN_INFO "class_device_create failed %d\n", rc);
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rc = -ENOMEM;
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goto class_destroy;
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}
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cdev_init(&tzic_cdev, &tzic_fops);
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tzic_cdev.owner = THIS_MODULE;
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rc = cdev_add(&tzic_cdev, MKDEV(MAJOR(tzic_device_no), 0), 1);
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if (rc < 0) {
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LOG(KERN_INFO "cdev_add failed %d\n", rc);
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goto class_device_destroy;
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}
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return 0;
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class_device_destroy:
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device_destroy(driver_class, tzic_device_no);
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class_destroy:
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class_destroy(driver_class);
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unregister_chrdev_region:
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unregister_chrdev_region(tzic_device_no, 1);
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return rc;
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}
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static void __exit tzic_exit(void)
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{
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device_destroy(driver_class, tzic_device_no);
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class_destroy(driver_class);
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unregister_chrdev_region(tzic_device_no, 1);
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}
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#if defined(CONFIG_TZIC_USE_TZDEV) || defined(CONFIG_TZIC_USE_TRUSTONIC)
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static int gotoCpu0(void)
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{
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int ret = 0;
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struct cpumask mask = CPU_MASK_CPU0;
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ret = set_cpus_allowed_ptr(current, &mask);
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if (ret != 0)
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LOG(KERN_INFO "set_cpus_allowed_ptr=%d.\n", ret);
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return ret;
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}
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static int gotoAllCpu(void)
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{
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int ret = 0;
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struct cpumask mask = CPU_MASK_ALL;
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ret = set_cpus_allowed_ptr(current, &mask);
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if (ret != 0)
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LOG(KERN_INFO "set_cpus_allowed_ptr=%d.\n", ret);
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return ret;
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}
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#endif
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Samsung TZIC Driver");
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MODULE_VERSION("1.00");
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module_init(tzic_init);
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module_exit(tzic_exit);
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