/**
* m5mols_fw_start - M-5MOLS internal ARM controller initialization
*
* Execute the M-5MOLS internal ARM controller initialization sequence.
* This function should be called after the supply voltage has been
* applied and before any requests to the device are made.
*/
static int m5mols_fw_start(struct v4l2_subdev *sd)
{
struct m5mols_info *info = to_m5mols(sd);
int ret;
atomic_set(&info->irq_done, 0);
/* Wait until I2C slave is initialized in Flash Writer mode */
ret = m5mols_busy_wait(sd, FLASH_CAM_START, REG_IN_FLASH_MODE,
M5MOLS_I2C_RDY_WAIT_FL | 0xff, -1);
if (!ret)
ret = m5mols_write(sd, FLASH_CAM_START, REG_START_ARM_BOOT);
if (!ret)
ret = m5mols_wait_interrupt(sd, REG_INT_MODE, 2000);
if (ret < 0)
return ret;
info->isp_ready = 1;
ret = m5mols_get_version(sd);
if (!ret)
ret = m5mols_update_fw(sd, m5mols_sensor_power);
if (ret)
return ret;
v4l2_dbg(1, m5mols_debug, sd, "Success ARM Booting\n");
ret = m5mols_write(sd, PARM_INTERFACE, REG_INTERFACE_MIPI);
if (!ret)
ret = m5mols_enable_interrupt(sd,
REG_INT_AF | REG_INT_CAPTURE);
return ret;
}
/**
* m5mols_sensor_armboot - Booting M-5MOLS internal ARM core.
*
* Booting internal ARM core makes the M-5MOLS is ready for getting commands
* with I2C. It's the first thing to be done after it powered up. It must wait
* at least 520ms recommended by M-5MOLS datasheet, after executing arm booting.
*/
static int m5mols_sensor_armboot(struct v4l2_subdev *sd)
{
int ret;
ret = m5mols_write(sd, FLASH_CAM_START, REG_START_ARM_BOOT);
if (ret < 0)
return ret;
msleep(520);
ret = m5mols_get_version(sd);
if (!ret)
ret = m5mols_update_fw(sd, m5mols_sensor_power);
if (ret)
return ret;
v4l2_dbg(1, m5mols_debug, sd, "Success ARM Booting\n");
ret = m5mols_write(sd, PARM_INTERFACE, REG_INTERFACE_MIPI);
if (!ret)
ret = m5mols_enable_interrupt(sd, REG_INT_AF);
return ret;
}
