int bq27520_rom_mode_cmp(int reg_off, int value)
{
int retry = RETRY_COUNT;
struct i2c_client *i2c = NULL;
int val=0;
int ret=0;
mutex_lock(&batt_dev_upt_mutex);
i2c = batt_upt_dev_info.i2c;
mutex_unlock(&batt_dev_upt_mutex);
BAT_DBG_E("[%s] enter \n", __func__);
while (retry--) {
ret = bq27520_read_i2c(i2c, reg_off, &val, 1);
if (ret < 0) continue;
break;
};
if (!retry && ret < 0) {
return ret;
}
return val == value ? PROC_TRUE : PROC_FALSE;
}
int bq27520_exit_rom_mode()
{
int retry = RETRY_COUNT;
struct i2c_client *i2c = NULL;
struct i2c_client *client = NULL;
int val=0;
int ret=0;
mutex_lock(&batt_dev_upt_mutex);
i2c = batt_upt_dev_info.i2c;
mutex_unlock(&batt_dev_upt_mutex);
BAT_DBG_E("[%s] enter \n", __func__);
while (retry--) {
ret = bq27520_write_i2c(i2c, 0x00, 0x0F, 1);
if (ret < 0) continue;
ret = bq27520_write_i2c(i2c, 0x64, 0x0F, 1);
if (ret < 0) continue;
ret = bq27520_write_i2c(i2c, 0x65, 0x00, 1);
if (ret < 0) continue;
break;
};
if (!retry) {
BAT_DBG_E("Exit ROM mode FAIL \n");
return ret;
}
/*
* verify it's NOT ROM node.
* Yes if read registers FAIL from now on.
*/
ret = bq27520_read_i2c(i2c, 0x00, &val, 1);
if (!ret) {
BAT_DBG_E("Exit ROM Mode verification FAIL.\n");
return -EACCES;
}
/*
* wait 1s and send IT_ENABLE command
* (battery team request)
*/
msleep(1000);
mutex_lock(&bq27520_dev_info_mutex);
client = bq27520_dev_info.i2c;
mutex_unlock(&bq27520_dev_info_mutex);
ret = bq27520_send_subcmd(client, NULL, BQ27520_SUBCMD_ENABLE_IT);
if (ret)
return ret;
return 0;
}
int bq27520_rom_mode_read_i2c(u8 reg, int *rt_value, int b_single)
{
struct i2c_client *i2c = NULL;
mutex_lock(&batt_dev_upt_mutex);
i2c = batt_upt_dev_info.i2c;
mutex_unlock(&batt_dev_upt_mutex);
if (!i2c|| !i2c->adapter)
return -ENODEV;
return bq27520_read_i2c(i2c, reg, rt_value, b_single);
}
int bq27520_enter_rom_mode()
{
int retry = RETRY_COUNT;
struct i2c_client *i2c = NULL;
int val=0;
int ret=0;
BAT_DBG_E("[%s] enter \n", __func__);
if (bq27520_is_rom_mode()) {
return 0;
}
mutex_lock(&bq27520_dev_info_mutex);
i2c = bq27520_dev_info.i2c;
mutex_unlock(&bq27520_dev_info_mutex);
while (retry--) {
ret = bq27520_write_i2c(i2c, 0x00, 0x0F00, 0);
if (ret < 0) continue;
break;
};
if (ret < 0) {
BAT_DBG_E("Enter ROM mode FAIL \n");
return ret;
}
/*
* verify it's ROM node.
* Yes if read registers FAIL from now on.
*/
ret = bq27520_read_i2c(i2c, 0x00, &val, 1);
if (!ret) {
BAT_DBG_E("Exit ROM Mode verification FAIL.\n");
return -EACCES;
}
return 0;
}
int bq27520_is_rom_mode(void)
{
int retry = RETRY_COUNT;
struct i2c_client *i2c = NULL;
int val=0;
int ret=0;
BAT_DBG_E("[%s] enter \n", __func__);
mutex_lock(&batt_dev_upt_mutex);
i2c = batt_upt_dev_info.i2c;
mutex_unlock(&batt_dev_upt_mutex);
while (retry--) {
ret = bq27520_read_i2c(i2c, 0x00, &val, 1);
if (ret < 0) continue;
break;
};
if (ret < 0) {
return 0; //not rom mode
}
return 1; //it's rom mode
}
int bq27520_ME560CG_unseal() {
struct i2c_client *i2c = NULL;
int val=0;
int ret=0;
BAT_DBG_E("[%s] enter \n", __func__);
mutex_lock(&bq27520_dev_info_mutex);
i2c = bq27520_dev_info.i2c;
mutex_unlock(&bq27520_dev_info_mutex);
ret = bq27520_write_i2c_retry(i2c, 0x00, 0x14);
if (ret < 0) {
BAT_DBG_E("Enter ROM mode FAIL \n");
return ret;
}
ret = bq27520_write_i2c_retry(i2c, 0x01, 0x04);
if (ret < 0) {
BAT_DBG_E("Enter ROM mode FAIL \n");
return ret;
}
ret = bq27520_write_i2c_retry(i2c, 0x00, 0x72);
if (ret < 0) {
BAT_DBG_E("Enter ROM mode FAIL \n");
return ret;
}
ret = bq27520_write_i2c_retry(i2c, 0x01, 0x16);
if (ret < 0) {
BAT_DBG_E("Enter ROM mode FAIL \n");
return ret;
}
bq27520_rom_mode_wait(20);
ret = bq27520_write_i2c_retry(i2c, 0x00, 0xff);
if (ret < 0) {
BAT_DBG_E("Enter ROM mode FAIL \n");
return ret;
}
ret = bq27520_write_i2c_retry(i2c, 0x01, 0xff);
if (ret < 0) {
BAT_DBG_E("Enter ROM mode FAIL \n");
return ret;
}
ret = bq27520_write_i2c_retry(i2c, 0x00, 0xff);
if (ret < 0) {
BAT_DBG_E("Enter ROM mode FAIL \n");
return ret;
}
ret = bq27520_write_i2c_retry(i2c, 0x01, 0xff);
if (ret < 0) {
BAT_DBG_E("Enter ROM mode FAIL \n");
return ret;
}
bq27520_rom_mode_wait(20);
ret = bq27520_write_i2c_retry(i2c, 0x00, 0x00);
if (ret < 0) {
BAT_DBG_E("Enter ROM mode FAIL \n");
return ret;
}
ret = bq27520_write_i2c_retry(i2c, 0x01, 0x0f);
if (ret < 0) {
BAT_DBG_E("Enter ROM mode FAIL \n");
return ret;
}
bq27520_rom_mode_wait(20);
/*
* verify it's ROM mode.
* Yes if read registers FAIL from now on.
*/
ret = bq27520_read_i2c(i2c, 0x00, &val, 1);
if (!ret) {
BAT_DBG_E("Exit ROM Mode verification FAIL.\n");
return -EACCES;
}
return 0;
}
static inline int bq27520_read(struct i2c_client *client,
u8 reg, int *rt_value, int b_single)
{
return bq27520_read_i2c(client, reg, rt_value, b_single);
}
