MTK之camera框架

来源：互联网发布：云端软件平台pc 编辑：程序博客网时间：2024/05/21 22:38

/*自己分析camera驱动程序*/

image_sensor驱动程序

/ *

* case KDIMGSENSORIOC_X_SET_DRIVER:

* i4RetValue = kdSetDriver((unsigned int*)pBuff);

* /

关键函数 int kdSetDriver(unsigned int* pDrvIndex);

{

....

kdGetSensorInitFuncList(&pSensorList);//即 *pSensorList = &kdSensorList[0].

...

drvIdx[i] = (pDrvIndex[i] & KDIMGSENSOR_DUAL_MASK_LSB);//获得是哪一个驱动

...

pSensorList[drvIdx[i]].SensorInit;//判断sensorinit是否为空

pSensorList[drvIdx[i]].SensorInit(&g_pInvokeSensorFunc[i]);//即*g_pInvokeSensorFunc[i]

= &SensorFuncOV5647;

相应的ic驱动

/*ps:其中g_pInvokeSensorFunc为静态的全局变量*/

}

typedef struct{MUINT32 SensorId;MUINT8  drvname[32];

MUINT32 (* SensorInit)(PSENSOR_FUNCTION_STRUCT *pfFunc);} ACDK_KD_SENSOR_INIT_FUNCTION_STRUCT, *PACDK_KD_SENSOR_INIT_FUNCTION_STRUCT;

ACDK_KD_SENSOR_INIT_FUNCTION_STRUCT<strong> <span style="color:#ff0000;">kdSensorList</span></strong>[MAX_NUM_OF_SUPPORT_SENSOR+1] ={#if defined(OV8830_RAW)    {OV8830_SENSOR_ID, SENSOR_DRVNAME_OV8830_RAW, OV8830SensorInit}, #endif#if defined(OV9740_MIPI_YUV)    {OV9740MIPI_SENSOR_ID, SENSOR_DRVNAME_OV9740_MIPI_YUV,  OV9740_MIPI_YUV_SensorInit}, #endif#if defined(IMX073_MIPI_RAW)    {IMX073_SENSOR_ID, SENSOR_DRVNAME_IMX073_MIPI_RAW,  IMX073_MIPI_RAW_SensorInit},#endif.....}

以SensorFuncOV5647系列的imagesensor为例：

typedef struct{   MUINT32 (* SensorOpen)(void);     MUINT32 (* SensorGetInfo) (MUINT32 *pScenarioId[2], MSDK_SENSOR_INFO_STRUCT   *pSensorInfo[2],MSDK_SENSOR_CONFIG_STRUCT *pSensorConfigData[2]);     MUINT32 (* SensorGetResolution) (MSDK_SENSOR_RESOLUTION_INFO_STRUCT *pSensorResolution[2]);   MUINT32 (* SensorFeatureControl) (CAMERA_DUAL_CAMERA_SENSOR_ENUM InvokeCamera,MSDK_SENSOR_FEATURE_ENUM FeatureId, MUINT8 *pFeaturePara,MUINT32 *pFeatureParaLen);   MUINT32 (* SensorControl) (MSDK_SCENARIO_ID_ENUM ScenarioId,MSDK_SENSOR_EXPOSURE_WINDOW_STRUCT *pImageWindow, MSDK_SENSOR_CONFIG_STRUCT *pSensorConfigData);   MUINT32 (* SensorClose)(void);} MULTI_SENSOR_FUNCTION_STRUCT, *PMULTI_SENSOR_FUNCTION_STRUCT;

SENSOR_FUNCTION_STRUCTSensorFuncOV5647={OV5647Open,OV5647GetInfo,OV5647GetResolution,OV5647FeatureControl,OV5647Control,OV5647Close};UINT32 OV5647SensorInit(PSENSOR_FUNCTION_STRUCT *pfFunc){/* To Do : Check Sensor status here */if (pfFunc!=NULL)*pfFunc=&SensorFuncOV5647;return ERROR_NONE;}

    UINT32 err = 0;        KD_IMGSENSOR_PROFILE_INIT();        //power on sensor    if (atomic_read(&g_CamHWOpend) == 0  ) { //只有一个程序打开该设备        if (g_pSensorFunc) { //?? *g_pSensorFunc = &kd_MultiSensorFunc应该定义一个 *g_pSensorFunc =&g_pInvokeSensorFunc       err = g_pSensorFunc->SensorOpen();//调用IC驱动定义的SensorOpen函数            if(ERROR_NONE != err) {                PK_DBG(" ERROR:SensorOpen(), turn off power \n");                kdModulePowerOn((CAMERA_DUAL_CAMERA_SENSOR_ENUM*) g_invokeSocketIdx, g_invokeSensorNameStr, false, CAMERA_HW_DRVNAME1);            }        }        else {            PK_DBG(" ERROR:NULL g_pSensorFunc\n");        }        KD_IMGSENSOR_PROFILE("SensorOpen");    }else {PK_ERR("adopt_CAMERA_HW_Open Fail, g_CamHWOpend = %d\n ",atomic_read(&g_CamHWOpend) );}    if (err == 0 ) {        atomic_set(&g_CamHWOpend, 1);    }    return err?-EIO:err;}

当调用open函数时，最终调用IC驱动的open函数

UINT32 OV5647Open(void){kal_uint16 sensor_id=0; // check if sensor ID correctsensor_id=((OV5647_read_cmos_sensor(0x300A)<<8)| OV5647_read_cmos_sensor(0x300B));   #ifdef OV5647_DRIVER_TRACESENSORDB("OV5647Open, sensor_id:%x \n",sensor_id);#endifif (sensor_id != OV5647_SENSOR_ID)return ERROR_SENSOR_CONNECT_FAIL;/* initail sequence write in  */OV5647_Sensor_Init();spin_lock(&ov5647_drv_lock);OV5647AutoFlicKerMode = KAL_FALSE;OV5647_sensor.Prv_line_length = OV5647_PV_PERIOD_PIXEL_NUMS;//For ZSDspin_unlock(&ov5647_drv_lock);return ERROR_NONE;}

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