int efuse_write(char *buf, unsigned count, unsigned *ppos, int from)
{
unsigned pos = *ppos;
const char *pc;
unsigned long contents[EFUSE_DWORDS];
if (pos >= EFUSE_BYTES)
return 0; /* Past EOF */
if (count > EFUSE_BYTES - pos)
count = EFUSE_BYTES - pos;
if (count > EFUSE_BYTES)
return -1;
which=from;
efuse_init();
int i;
// checkout if have been written
memset(contents, 0, EFUSE_DWORDS);
pc = (char*)contents;
efuse_read(pc, count, &pos, from);
for(i=0; i<count; i++){
if(pc[i] != 0)
return -1;
}
pos = *ppos;
for (pc = buf; count--; ++pos, ++pc)
__efuse_write_byte(pos, *pc);
*ppos = pos;
return 0;
}
static ssize_t efuse_block_dump(struct device *dev,
struct device_attribute *attr, char *buf)
{
int idx;
char *p = buf;
p += sprintf(p, "ddie efuse blocks dump:\n");
for (idx = 0; idx < EFUSE_BLOCK_MAX; idx++) {
p += sprintf(p, "[%02d] %08x\n", idx, efuse_read(idx));
}
return p - buf;
}
int do_read_efuse(int ppos,int *flag,int *temp,int *TS_C, int print)
{
char buf[2];
int ret;
int cpu = 0;
char *cpu_str[] = {"M8", "M8M2", "M8Baby", "G9TV", "G9TVBaby"};
*flag=0;
buf[0]=0;
buf[1]=0;
//read efuse tsc,flag
efuse_init();
ret=efuse_read(buf,2,(loff_t *)&ppos);
if (print) {
printf("buf[0]=%x,buf[1]=%x\n",buf[0],buf[1]);
}
if (IS_MESON_M8_CPU) {
*temp=buf[1];
*temp=(*temp<<8)|buf[0];
*TS_C=*temp&0xf;
*flag=(*temp&0x8000)>>15;
*temp=(*temp&0x7fff)>>4;
cpu = 0;
} else if (IS_MESON_M8M2_CPU) {
static int _key_query_secure_boot_set(char* keyname, unsigned int * keystate)
{
unsigned int pos = 0;
unsigned int info_lis=0xffffffff;
int nChkVal = 0, nChkAddr = 0;
if(strcmp("secure_boot_set", keyname)){
printf("Err, key name (%s) is not secure_boot_set\n", keyname);
return -__LINE__;
}
//Check if bit7 && bit 6 are both 1
//Attention: check this code to stay same with cmd[efuse secure_boot_set]
efuse_read(&nChkVal,sizeof(nChkVal),(loff_t*)&nChkAddr);
if(((nChkVal >> 7) & 1) && ((nChkVal >> 6) & 1))
{
*keystate = KEY_BURNED;
return __LINE__;
}
*keystate = KEY_NO_EXIST;//key not burned
return 0;
}
