static ssize_t qfprom_write_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret = 0;
if (!enable) {
printk("%s: qfprom write is not enabled\n", __func__);
return -EINVAL;
}
if (!qfprom_address) {
printk("%s: qfprom address is NULL\n", __func__);
return -EINVAL;
}
ret = qfuse_write_single_row(qfprom_address, qfprom_lsb_value,
qfprom_msb_value);
qfprom_address = 0;
if (ret == 0)
return count;
else if (ret < 0)
printk("%s: scm call fail error = %d\n", __func__, ret);
else
printk("%s: qfprom write status error = %d\n", __func__, ret);
return -EINVAL;
}
static ssize_t qfprom_sdp_enum_store(struct device* dev, struct device_attribute* attr,
const char* buf, size_t count)
{
int cmd;
int ret;
struct qfprom_blow_data sdp_data = { QFPROM_DEBUG_DISABLE, 0x200, 0x0 };
if (sscanf(buf, "%d", &cmd) != 1)
return -EINVAL;
if (cmd) {
ret = qfuse_write_single_row(sdp_data.qfprom_addr,sdp_data.lsb_data,sdp_data.msb_data);
if(ret!=0){
printk("%s: qfuse addr %x blow write error!!!\n",__func__,sdp_data.qfprom_addr);
return -EINVAL;
}
}
return count;
}
int qfprom_blow_secondary_hwkey_region(void)
{
int ret;
u32 addr, lsb, msb;
int i;
u32 *p_buf = NULL;
p_buf = kmalloc(sizeof(u32)*2, GFP_KERNEL);
if(!p_buf){
printk("%s : buffer memory alloc fail\n", __func__);
return -ENOMEM;
}
/* we check read permission
* if read permission region is blown, we can see all hw secondary key is blown
* because permission fuse is follow to secondary hw key
*/
ret = qfuse_read_single_row(QFPROM_RD_WR_PERMISSION, 0, p_buf);
if(ret != 0){
printk("%s: qfuse addr %x read fail, ret=%d\n", __func__, QFPROM_RD_WR_PERMISSION, ret);
ret = -EINVAL;
goto err;
}
if((p_buf[0]&0x0C000000) == 0x0C000000) {
printk("%s: All hw key was written already\n", __func__);
ret = 0;
goto err;
}
addr = QFPROM_SECONDARY_HW_KEY;
for(i=0;i<7;i++){
/* we can read hw secondary key region because before read permission is set */
/*
ret = qfuse_read_single_row(addr, 0, p_buf);
if(ret != 0){
printk("%s: qfuse addr %x read fail, ret=%d\n", __func__, addr,ret);
ret = -EINVAL;
goto err;
}
printk("%s:Currently, secondary key addr=0x%x, lsb=0x%x, msb=0x%x\n", __func__, addr,p_buf[0], p_buf[1]);
*/
msleep(10);
/* if you have not written ever hw key before, value to read will be zero
* so create random using tzbsp
* LSB region */
if(!p_buf[0]){
lsb = qfprom_create_random();
if(!lsb) {
ret = -EINVAL;
goto err;
}
msleep(5);
} else {
/* dont create random value and rewrite value to read */
printk("hw lsb key was blow already in 0x%x addr\n", addr);
lsb = p_buf[0];
}
/* if you have not written ever hw key before, value to read will be zero
* so create random using tzbsp
* MSB region */
if(!p_buf[1]) {
msb = qfprom_create_random();
if(!msb) {
ret = -EINVAL;
goto err;
}
msleep(5);
} else {
printk("hw msb key was blow already in 0x%x addr\n", addr+4);
msb = p_buf[1];
}
/* must mask FEC bit */
lsb = lsb&HW_KEY_LSB_FEC_MASK;
msb = msb&HW_KEY_MSB_FEC_MASK;
printk("We start to writing secondary key !!!\n");
printk("addr=0x%x, lsb=0x%x, msb=0x%x\n", addr, lsb, msb);
msleep(10);
ret = qfuse_write_single_row(addr, lsb, msb);
if(ret != 0) {
printk("%s:qfus addr 0x%x write error, ret=%d\n", __func__, addr, ret);
ret = -EINVAL;
goto err;
} else {
/* write double check routine */
printk("hw secondary key write successful\n");
msleep(10);
/*
ret = qfuse_read_single_row(addr, 0, p_buf);
if(ret != 0) {
printk("%s:read fail when double check routine, ret=%d\n", __func__, ret);
goto err;
}
if((p_buf[0]==lsb)&&(p_buf[1]==msb))
printk("%s: hw key write double check successful!!!!!!!\n",__func__);
else {
printk("%s: hw key double check error, read_lsb=0x%x,read_msb=0x%x\n",__func__,p_buf[0],p_buf[1]);
ret = -EINVAL;
goto err;
}
*/
}
addr = addr+8;
msleep(10);
}
err:
kfree(p_buf);
return ret;
}
/* this api handle diag command(fusing command) from ATD
* this api fuse secure boot, jtag disable, oem config, secondary hw key, R/W permission
* this api check secondary hw key status before fusing R/W permission
*/
static ssize_t qfusing_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
int i = 0;
u32 *p_buf = NULL;
u32 fusing_flag=0;
if(!sysfs_streq(buf, "fusing")){
printk("%s:argument fault\n", __func__);
ret = -EINVAL;
goto err;
}
p_buf = kmalloc(sizeof(u32)*2, GFP_KERNEL);
if(!p_buf) {
printk("%s: memory alloc fail\n", __func__);
ret = -EINVAL;
goto err;;
}
for(i=0;i<ARRAY_SIZE(blow_data);i++){
if(blow_data[i].qfprom_addr==QFPROM_CHECK_HW_KEY) {
/* We dont check secondary hw key status
* But qfprom_blow secondary_hwkey_region api does not create random if qfprom block was written
* The api create random if was not written only
* So HW key region to be written is not written by new random key
* The reason to not check hw key status reg is to check 7 hw key block to be written
*/
ret = qfprom_blow_secondary_hwkey_region();
if(ret < 0) {
printk("%s: hw key region blow error\n", __func__);
goto err_fuse;
}
fusing_flag |= (0x1<<i);
printk("%s: HW secondary key region is blown successfully\n", __func__);
continue;
}
msleep(10);
ret = qfuse_read_single_row(blow_data[i].qfprom_addr, 0, p_buf);
if(ret != 0) {
printk("%s: qfprom addr %x read fail, ret=%d\n", __func__, blow_data[i].qfprom_addr, ret);
goto err_fuse;
}
printk("%s:read addr 0x%x, lsb 0x%x, msb 0x%x\n", __func__, blow_data[i].qfprom_addr, p_buf[0], p_buf[1]);
/* Don't rewrite if value to read is same value to write */
if(((p_buf[0]&blow_data[i].lsb_data) == blow_data[i].lsb_data) &&
((p_buf[1]&blow_data[i].msb_data) == blow_data[i].msb_data)) {
printk("%s: 0x%x was blown already\n", __func__, blow_data[i].qfprom_addr);
} else {
msleep(10);
ret = qfuse_write_single_row(blow_data[i].qfprom_addr, blow_data[i].lsb_data, blow_data[i].msb_data);
if(ret != 0) {
printk("%s: qfuse addr %x blow write error!!!\n", __func__, blow_data[i].qfprom_addr);
ret = -EINVAL;
goto err_fuse;
} else {
/* double check routine*/
msleep(10);
printk("%s: qfprom 0x%x addr write double check routine\n", __func__, blow_data[i].qfprom_addr);
ret = qfuse_read_single_row(blow_data[i].qfprom_addr, 0, p_buf);
if(ret != 0) {
printk("%s: read fail when double check, ret=%d\n", __func__, ret);
ret = -EINVAL;
goto err_fuse;
}
if(((p_buf[0]&blow_data[i].lsb_data) == blow_data[i].lsb_data) &&
((p_buf[1]&blow_data[i].msb_data) == blow_data[i].msb_data)) {
printk("%s:write double check successfully", __func__);
} else {
printk("%s:qfprom write successful but error when double check\n", __func__);
ret = -EINVAL;
goto err_fuse;
}
}
}
fusing_flag |= (0x1<<i);
}
printk("%s: fusing flag = 0x%x\n", __func__, fusing_flag);
printk("%s: fusing complete!!!!!!!!!!!!!!!!!!!!\n", __func__);
kfree(p_buf);
return count;
err_fuse:
kfree(p_buf);
err:
return ret;
}