rt-thread/bsp/allwinner/libraries/sunxi-hal/hal/source/efuse/hal_efuse.c

/*
 * Copyright 2018 AllWinnertech  Co., Ltd
 * wangwei@allwinnertech.com
 */
#include <stdio.h>
#include <string.h>

#include <sunxi_hal_efuse.h>
#include <sunxi_hal_common.h>

#include "platform_efuse.h"
#include "efuse.h"

#if (EFUSE_DBG_EN & (CONFIG_LOG_DEFAULT_LEVEL != 0))
#define EFUSE_DBG(fmt,args...)  printf(fmt ,##args)
#define EFUSE_DUMP_LEN 16
#define EFUSE_DBG_DUMP(key_name, key_data, key_len)  efuse_dump(key_name, key_data, key_len, EFUSE_DUMP_LEN)
#else
#define EFUSE_DBG(fmt,args...)
#define EFUSE_DBG_DUMP(...) do{} while(0);
#endif


#if EFUSE_DBG_EN
static  void efuse_dump(char *str,unsigned char *data,\
    int len, int align)
{
    int i = 0;
    if(str)
        printf("\n%s: ",str);
    for(i = 0; i<len; i++)
    {
        if((i%align) == 0)
        {
            printf("\n");
        }
        printf("%02x ",*(data++));
    }
    printf("\n");
}
#endif

int hal_efuse_write(char *key_name, unsigned char *key_data, size_t key_bit_len)
{
    unsigned long k_src = 0;
    unsigned int niddle = 0,tmp_data = 0,k_d_lft = 0 ;
    size_t key_len = key_bit_len>>3;
    efuse_key_map_new_t *key_map;
    int ret;

    if ((strlen(key_name) == 0)|| (key_len == 0) || ((unsigned long)key_data%4 != 0))
        return EFUSE_ERR_ARG;

    key_map = efuse_search_key_by_name(key_name);

    if (((unsigned int)key_map->size >> 3) < key_len) {
        EFUSE_DBG("key name = %s\n", key_map->name);
        return EFUSE_ERR_KEY_SIZE_TOO_BIG;
    }

    if (key_map->size == 0) {
        EFUSE_DBG("%s: error: unknow key\n", __func__);
        return EFUSE_ERR_KEY_NAME_WRONG;
    }

    ret = efuse_acl_ck(key_map, 1);
    if(ret) {
        EFUSE_DBG("%s: __efuse_acl_ck check failed\n", __func__);
        return ret;
    }
    EFUSE_DBG_DUMP(key_name, key_data, key_len);

    /*rotpk need double check before burn*/
    if (strcmp(key_name, "rotpk") == 0) {
    }

    niddle = key_map->offset;
    k_d_lft = key_len;
    k_src = (unsigned long)key_data;

    while(k_d_lft >= 4) {
        tmp_data = *(unsigned int*)k_src;
        EFUSE_DBG("offset:0x%x val:0x%x\n",niddle,tmp_data);
        if(tmp_data)
        {
            if(efuse_uni_burn_key(niddle, tmp_data))
            {
                return  EFUSE_ERR_BURN_TIMING;
            }
        }
        k_d_lft-=4;
        niddle += 4;
        k_src +=4;
    }

    if(k_d_lft) {
        uint mask = (1UL << (k_d_lft << 3)) - 1;
        tmp_data = *(unsigned int*)k_src;
        mask &= tmp_data;
        EFUSE_DBG("offset:0x%x val:0x%x\n",niddle,mask);
        if(mask)
        {
            if(efuse_uni_burn_key(niddle,mask))
            {
                return  EFUSE_ERR_BURN_TIMING;
            }
        }
    }
    /*Already burned bit: Set this bit to indicate it is already burned.*/
    if ((key_map->burned_flg_offset >= 0) &&
       (key_map->burned_flg_offset <= EFUSE_BRUN_RD_OFFSET_MASK)) {
        efuse_set_cfg_flg(EFUSE_WRITE_PROTECT,key_map->burned_flg_offset);
    }

    /*Read forbidden bit: Set to indicate cpu can not access this key again.*/
    if ((key_map->rd_fbd_offset >= 0) &&
       (key_map->rd_fbd_offset <= EFUSE_BRUN_RD_OFFSET_MASK)) {
        efuse_set_cfg_flg(EFUSE_READ_PROTECT,key_map->rd_fbd_offset);
    }

    return 0;
}

/*This API assume the caller already
*prepared enough buffer to receive data.
*Because the lenth of key is exported as MACRO*/
#define EFUSE_ROUND_UP(x,y)  ((((x) + ((y) - 1)) / (y)) * (y))
int hal_efuse_read(char *key_name, unsigned char *key_data, size_t key_bit_len)
{
    efuse_key_map_new_t *key_map;
    uint tmp=0,i=0,k_u32_l=0,bit_lft = 0;
    int offset =0,tmp_sz = 0;
    int ret;
    /*if key_data not aligned ,u32_p will not be accessed*/
    unsigned int *u32_p = (unsigned int *)key_data;
    unsigned char *u8_p = (unsigned char *)key_data;
    if(!(key_name && key_data)) {
        EFUSE_DBG("[efuse] error arg: key_name is %p, key_data is %p\n",key_name, key_data);
        return EFUSE_ERR_ARG;
    }

    key_map = efuse_search_key_by_name(key_name);

    if (key_map->size == 0 || key_map->size > key_bit_len) {
        EFUSE_DBG("[efuse] error: unknow key name\n");
        return EFUSE_ERR_KEY_NAME_WRONG;
    }

    ret = efuse_acl_ck(key_map, 0);
    if(ret) {
        EFUSE_DBG("[sunxi_efuse_write] error: acl check fail\n");
        return ret;
    }
    EFUSE_DBG("key name:%s key size:%d key offset:%d\n",\
        key_map->name,key_map->size,key_map->offset);

    if (key_map->size > key_bit_len) {
        EFUSE_DBG("[efuse] error: key size\n");
        return EFUSE_ERR_ARG;
    }

    k_u32_l = key_map->size / 32;
    bit_lft = key_map->size % 32;
    offset = key_map->offset;

    for(i = 0;i<k_u32_l;i++)
    {
        tmp = efuse_sram_read_key(offset);
        if(((unsigned long)key_data & 0x3) == 0)
        {
            u32_p[i] = tmp;
        }
        else
        {
            memcpy((void*)(u8_p + i * 4),(void*)(&tmp),4);
        }
        offset += 4;
        tmp_sz += 4;
    }

    if(bit_lft)
    {
        EFUSE_DBG("bit lft is %d\n",bit_lft);
        tmp = efuse_sram_read_key(offset);
        memcpy((void*)(u8_p + k_u32_l * 4),(void*)(&tmp),
               EFUSE_ROUND_UP(bit_lft,8) / 8);
        tmp_sz += (EFUSE_ROUND_UP(bit_lft,8) / 8);
    }

    EFUSE_DBG_DUMP(key_name, key_data, key_bit_len/8);

    return tmp_sz;
}

int hal_efuse_set_security_mode(void)
{
#ifdef EFUSE_LCJS
    return efuse_uni_burn_key(EFUSE_LCJS, 0x1 << SECURE_BIT_OFFSET);
#else
    return 0;
#endif
}


int hal_efuse_get_security_mode(void)
{
#ifdef EFUSE_SECURE_MODE
    return hal_readl(EFUSE_SECURE_MODE) & 0x1;
#else
    return 0;
#endif
}

int hal_efuse_get_chipid(unsigned char *buffer)
{
       return hal_efuse_read("chipid", buffer, 128);
}

int hal_efuse_get_thermal_cdata(unsigned char *buffer)
{
       return hal_efuse_read("thermal_sensor", buffer, 64);
}