SmartAudio/lichee/brandy/arm-trusted-firmware-1.0/drivers/efuse/board_efuse.c

/*
**********************************************************************************************************************
*
*						           the Embedded Secure Bootloader System
*
*
*						       Copyright(C), 2006-2014, Allwinnertech Co., Ltd.
*                                           All Rights Reserved
*
* File    :
*
* By      :
*
* Version : V2.00
*
* Date	  :
*
* Descript:
**********************************************************************************************************************
*/
#include <debug.h>
#include "efuse.h"
#include <mmio.h>

#define readl(addr)               mmio_read_32(addr)
#define writel(value, addr)   mmio_write_32(addr, value)

#define SID_OP_LOCK  (0xAC)
/*
************************************************************************************************************
*
*                                             function
*
*    name          :
*
*    parmeters     :
*
*    return        :
*
*    note          :
*
*
************************************************************************************************************
*/
void sid_program_key(unsigned int key_index, unsigned int key_value)
{
	unsigned int reg_val;

	writel(key_value, SID_PRKEY);

	reg_val = readl(SID_PRCTL);
	reg_val &= ~((0x1ff<<16)|0x3);
	reg_val |= key_index<<16;
	writel(reg_val, SID_PRCTL);

	reg_val &= ~((0xff<<8)|0x3);
	reg_val |= (SID_OP_LOCK<<8) | 0x1;
	writel(reg_val, SID_PRCTL);

	while(readl(SID_PRCTL)&0x1){};

	reg_val &= ~((0x1ff<<16)|(0xff<<8)|0x3);
	writel(reg_val, SID_PRCTL);

	return;
}
/*
************************************************************************************************************
*
*                                             function
*
*    name          :
*
*    parmeters     :
*
*    return        :
*
*    note          :
*
*
************************************************************************************************************
*/
unsigned int sid_read_key(unsigned int key_index)
{
	unsigned int reg_val;

	reg_val = readl(SID_PRCTL);
	reg_val &= ~((0x1ff<<16)|0x3);
	reg_val |= key_index<<16;
	writel(reg_val, SID_PRCTL);

	reg_val &= ~((0xff<<8)|0x3);
	reg_val |= (SID_OP_LOCK<<8) | 0x2;
	writel(reg_val, SID_PRCTL);

	while(readl(SID_PRCTL)&0x2){};

	reg_val &= ~((0x1ff<<16)|(0xff<<8)|0x3);
	writel(reg_val, SID_PRCTL);

	reg_val = readl(SID_RDKEY);

	return reg_val;
}
/*
************************************************************************************************************
*
*                                             function
*
*    name          :
*
*    parmeters     :
*
*    return        :
*
*    note          :
*
*
************************************************************************************************************
*/
void sid_set_security_mode(void)
{
    unsigned int reg_val;

    reg_val  = sid_read_key(EFUSE_LCJS);
    reg_val |= (0x1<<11);		//使能securebit
    sid_program_key(EFUSE_LCJS, reg_val);
    reg_val = (sid_read_key(EFUSE_LCJS) >> 11) & 1;

    return;
}
/*
************************************************************************************************************
*
*                                             function
*
*    name          :
*
*    parmeters     :
*
*    return        :
*
*    note          :
*
*
************************************************************************************************************
*/
int sid_probe_security_mode(void)
{
	return ((sid_read_key(EFUSE_LCJS)>>11) & 1);
}