static ssize_t efuse_write( struct file *file, const char __user *buf,
size_t count, loff_t *ppos )
{
unsigned char contents[EFUSE_BYTES];
unsigned pos = *ppos;
unsigned char *pc;
if (pos >= EFUSE_BYTES)
return 0; /* Past EOF */
if (count > EFUSE_BYTES - pos)
count = EFUSE_BYTES - pos;
if (count > EFUSE_BYTES)
return -EFAULT;
printk( KERN_INFO "efuse_write: f_pos: %lld, ppos: %lld\n", file->f_pos, *ppos);
if (copy_from_user(contents, buf, count))
return -EFAULT;
for (pc = contents; count--; ++pos, ++pc)
__efuse_write_byte(pos, *pc);
*ppos = pos;
return pc - contents;
}
static ssize_t __efuse_write(const char *buf,
size_t count, loff_t *ppos )
{
unsigned pos = *ppos;
loff_t *readppos = ppos;
unsigned char *pc;
char efuse_data[EFUSE_USERIDF_BYTES],null_data[EFUSE_USERIDF_BYTES];
if (pos >= EFUSE_BYTES)
return 0; /* Past EOF */
if (count > EFUSE_BYTES - pos)
count = EFUSE_BYTES - pos;
if (count > EFUSE_BYTES)
return -EFAULT;
__efuse_read(efuse_data, count, readppos);
memset(null_data,0,count);
if(strncmp(efuse_data,null_data,count) != 0){
printk(" Data had written ,the block is not clean!!!\n");
return -EFAULT;
}
for (pc = buf; count--; ++pos, ++pc)
__efuse_write_byte(pos, *pc);
*ppos = pos;
return (const char *)pc - buf;
}
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 void efuse_write_byte(unsigned long addr, unsigned char data){
efuse_init();
unsigned int int_addr = addr;
__efuse_write_byte(int_addr, (unsigned long)data);
}