一、MTK平台Camera框架

MTK平台的Camera的架构见下图，

这里主要介绍kernel部分和HAL层部分。

1、Kernel 部分主要有两块:

1.1、image sensordriver,负责具体型号的 sensor 的 id 检测,上电，以及在preview、capture、初始化、3A等等功能设定时的寄存器配置。

1.2、isp driver，通过DMA将sensor数据流上传。

2、HAL层部分主要有三部分组成：

2.1、imageio，主要负责数据buffer上传的pipe。

2.2、drv，包含imgsensor和isp的hal层控制。

2.3、feature io，包含各种3A等性能配置。

二、Camera打开流程分析

Camera开启流程图如下：

主要发生在两个时间点：

1、开机时：camera完成了sensor框架初始化，id检测并匹配sensor，以及上下电操作。

2、打开Camera应用时：camera会有上电，完成sensor的寄存器初始化配置，向上层传递基本参数和配置信息，以及preview和capture模式循环。

1、开机初始化过程

由于一开始不知道上电camera初始化从哪开始，我们可以借助抓取的mtk mobile log去分析。先看hal层log开始处：

[plain] view plain copy

12-24 10:02:07.601 148 148 D MtkCam/module: [instantiate_camera_module]
12-24 10:02:07.601 148 148 D MtkCam/Utils/Property: [clear] pid/tid=148/148
12-24 10:02:07.601 148 148 I CameraService: Loaded "MediaTek Camera Module" camera module
12-24 10:02:07.601 148 148 D MtkCam/MtkCamUtils: [CamDevMetaInfoMap::clear] pid/tid=148/148
12-24 10:02:07.601 148 148 D SensorHal: [getInstance][SensorHalImp] getInstance
12-24 10:02:07.601 148 148 D SensorHal: [createImp][createImp]: 0
12-24 10:02:07.601 148 148 D SeninfDrvImp: [getInstance][getInstance]
12-24 10:02:07.601 148 148 D SeninfDrvImp: [SeninfDrvImp][SeninfDrvImp]
12-24 10:02:07.601 148 148 D SeninfDrvImp: [init][init]: 0

通过sourceinsight搜索发现开始是从CamDeviceManagerImp.cpp函数的enumDeviceLocked()开始。该函数的源代码如下：

===>mediatek/platform/mt6582/hardware/mtkcam/devicemgr/CamDeviceManagerImp.cpp

[cpp] view plain copy

/******************************************************************************
*
******************************************************************************/
int32_t
CamDeviceManagerImp::
enumDeviceLocked()
{
Utils::CamProfile _profile(__FUNCTION__, "CamDeviceManagerImp");
//
status_t status = OK;
int32_t i4DeviceNum = 0;
//
mEnumMap.clear();
//------------------------------------------------------------------------------
#if '1'==MTKCAM_HAVE_SENSOR_HAL
mEnumMap.clear();
DevMetaInfo::clear();
//
int32_t isFakeOrientation = 0;
int32_t i4DevSetupOrientation = 0;
camera_info camInfo;
camInfo.device_version = CAMERA_DEVICE_API_VERSION_1_0;
camInfo.static_camera_characteristics = NULL;
//
SensorHal* pSensorHal = SensorHal::createInstance();//创建sensor对象
if ( ! pSensorHal )
{
MY_LOGE("pSensorHal == NULL");
return 0;
}
//
int32_t const iSensorsList = pSensorHal->searchSensor();//此函数是入口，主要查找匹配的硬件sensor
//
//
if ( (iSensorsList & SENSOR_DEV_MAIN_3D) == SENSOR_DEV_MAIN_3D )
{
MY_LOGI("Stereo 3D Camera found");
#warning "[TODO] Stereo 3D Camera"
}
//
if ( (iSensorsList & SENSOR_DEV_MAIN) == SENSOR_DEV_MAIN )
{
int32_t const deviceId = i4DeviceNum;
//
halSensorDev_e const eHalSensorDev = SENSOR_DEV_MAIN;
pSensorHal->sendCommand(eHalSensorDev, SENSOR_CMD_GET_FAKE_ORIENTATION, (int)&isFakeOrientation);
pSensorHal->sendCommand(eHalSensorDev, SENSOR_CMD_GET_SENSOR_ORIENTATION_ANGLE, (int)&i4DevSetupOrientation);
pSensorHal->sendCommand(eHalSensorDev, SENSOR_CMD_GET_SENSOR_FACING_DIRECTION, (int)&camInfo.facing);
camInfo.orientation = i4DevSetupOrientation;
if ( isFakeOrientation )
{
camInfo.orientation = (0==camInfo.facing) ? 90 : 270;
MY_LOGW("Fake orientation:%d instead of %d, facing=%d HalSensorDev=%#x", camInfo.orientation, i4DevSetupOrientation, camInfo.facing, eHalSensorDev);
}
DevMetaInfo::add(deviceId, camInfo, i4DevSetupOrientation, eDevId_ImgSensor, eHalSensorDev);
//
sp<EnumInfo> pInfo = new EnumInfo;
pInfo->uDeviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
pInfo->pMetadata = NULL;
pInfo->iFacing = camInfo.facing;
pInfo->iWantedOrientation = camInfo.orientation;
pInfo->iSetupOrientation = i4DevSetupOrientation;
mEnumMap.add(deviceId, pInfo);
//
i4DeviceNum++;
}
//
if ( (iSensorsList & SENSOR_DEV_SUB) == SENSOR_DEV_SUB )
{
int32_t const deviceId = i4DeviceNum;
//
halSensorDev_e const eHalSensorDev = SENSOR_DEV_SUB;
pSensorHal->sendCommand(eHalSensorDev, SENSOR_CMD_GET_FAKE_ORIENTATION, (int)&isFakeOrientation);
pSensorHal->sendCommand(eHalSensorDev, SENSOR_CMD_GET_SENSOR_ORIENTATION_ANGLE, (int)&i4DevSetupOrientation);
pSensorHal->sendCommand(eHalSensorDev, SENSOR_CMD_GET_SENSOR_FACING_DIRECTION, (int)&camInfo.facing);
camInfo.orientation = i4DevSetupOrientation;
if ( isFakeOrientation )
{
camInfo.orientation = (0==camInfo.facing) ? 90 : 270;
MY_LOGW("Fake orientation:%d instead of %d, facing=%d HalSensorDev=%#x", camInfo.orientation, i4DevSetupOrientation, camInfo.facing, eHalSensorDev);
}
DevMetaInfo::add(deviceId, camInfo, i4DevSetupOrientation, eDevId_ImgSensor, eHalSensorDev);
//
sp<EnumInfo> pInfo = new EnumInfo;
pInfo->uDeviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
pInfo->pMetadata = NULL;
pInfo->iFacing = camInfo.facing;
pInfo->iWantedOrientation = camInfo.orientation;
pInfo->iSetupOrientation = i4DevSetupOrientation;
mEnumMap.add(deviceId, pInfo);
//
i4DeviceNum++;
}
//
// if ( (iSensorsList & SENSOR_DEV_ATV) == SENSOR_DEV_ATV )
{
int32_t const deviceId = 0xFF;
//
halSensorDev_e const eHalSensorDev = SENSOR_DEV_ATV;
camInfo.facing = 0;
camInfo.orientation = 0;
DevMetaInfo::add(deviceId, camInfo, camInfo.orientation, eDevId_AtvSensor, eHalSensorDev);
//
sp<EnumInfo> pInfo = new EnumInfo;
pInfo->uDeviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
pInfo->pMetadata = NULL;
pInfo->iFacing = camInfo.facing;
pInfo->iWantedOrientation = camInfo.orientation;
pInfo->iSetupOrientation = i4DevSetupOrientation;
mEnumMap.add(deviceId, pInfo);
//
// i4DeviceNum++;
}
//
//
if ( pSensorHal )
{
pSensorHal->destroyInstance();
pSensorHal = NULL;
}
//
MY_LOGI("iSensorsList=0x%08X, i4DeviceNum=%d", iSensorsList, i4DeviceNum);
for (size_t i = 0; i < mEnumMap.size(); i++)
{
int32_t const deviceId = mEnumMap.keyAt(i);
sp<EnumInfo> pInfo = mEnumMap.valueAt(i);
uint32_t const uDeviceVersion = pInfo->uDeviceVersion;
camera_metadata const*pMetadata = pInfo->pMetadata;
int32_t const iFacing = pInfo->iFacing;
int32_t const iWantedOrientation= pInfo->iWantedOrientation;
int32_t const iSetupOrientation = pInfo->iSetupOrientation;
MY_LOGI(
"[0x%02x] orientation(wanted/setup)=(%d/%d) facing:%d metadata:%p DeviceVersion:0x%x",
deviceId, iWantedOrientation, iSetupOrientation,
iFacing, pMetadata, uDeviceVersion
);
}
#else //----------------------------------------------------------------------
#warning "[WARN] Simulation for CamDeviceManagerImp::enumDeviceLocked()"
mEnumMap.clear();
DevMetaInfo::clear();
{
int32_t const deviceId = 0;
//
camera_info camInfo;
camInfo.device_version = CAMERA_DEVICE_API_VERSION_1_0;
camInfo.static_camera_characteristics = NULL;
camInfo.facing = 0;
camInfo.orientation = 90;
DevMetaInfo::add(deviceId, camInfo, camInfo.orientation, eDevId_ImgSensor, 0x01/*SENSOR_DEV_MAIN*/);
//
sp<EnumInfo> pInfo = new EnumInfo;
pInfo->uDeviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
pInfo->pMetadata = NULL;
pInfo->iFacing = 0;
pInfo->iWantedOrientation = 90;
pInfo->iSetupOrientation = 90;
mEnumMap.add(deviceId, pInfo);
}
//
{
int32_t const deviceId = 0xFF;
//
camera_info camInfo;
camInfo.device_version = CAMERA_DEVICE_API_VERSION_1_0;
camInfo.static_camera_characteristics = NULL;
camInfo.facing = 0;
camInfo.orientation = 0;
DevMetaInfo::add(deviceId, camInfo, camInfo.orientation, eDevId_AtvSensor, 0x04/*SENSOR_DEV_ATV*/);
//
sp<EnumInfo> pInfo = new EnumInfo;
pInfo->uDeviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
pInfo->pMetadata = NULL;
pInfo->iFacing = 0;
pInfo->iWantedOrientation = 0;
pInfo->iSetupOrientation = 0;
mEnumMap.add(deviceId, pInfo);
}
//
i4DeviceNum = 1;
#endif
//------------------------------------------------------------------------------
//
_profile.print("");
return i4DeviceNum;
}

函数pSensorHal->searchSensor()将调用SensorDrv::searchSensor(NULL)函数，该函数再调用ImgSensor_drv.cpp文件中中的ImgSensorDrv::impSearchSensor函数。

===>mediatek/platform/mt6582/hardware/mtkcam/core/drv/imgsensor/ImgSensor_drv.cpp

[cpp] view plain copy

/*******************************************************************************
*
********************************************************************************/
MINT32
ImgSensorDrv::impSearchSensor(pfExIdChk pExIdChkCbf)
{
MUINT32 SensorEnum = (MUINT32) DUAL_CAMERA_MAIN_SENSOR;
MUINT32 i,id[KDIMGSENSOR_MAX_INVOKE_DRIVERS] = {0,0};
MBOOL SensorConnect=TRUE;
UCHAR cBuf[64];
MINT32 err = SENSOR_NO_ERROR;
MINT32 err2 = SENSOR_NO_ERROR;
ACDK_SENSOR_INFO_STRUCT SensorInfo;
ACDK_SENSOR_CONFIG_STRUCT SensorConfigData;
ACDK_SENSOR_RESOLUTION_INFO_STRUCT SensorResolution;
MINT32 sensorDevs = SENSOR_NONE;
IMAGE_SENSOR_TYPE sensorType = IMAGE_SENSOR_TYPE_UNKNOWN;
IMGSENSOR_SOCKET_POSITION_ENUM socketPos = IMGSENSOR_SOCKET_POS_NONE;
//! If imp sensor search process already done before,
//! only need to return the sensorDevs, not need to
//! search again.
if (SENSOR_DOES_NOT_EXIST != m_mainSensorId) {
//been processed.
LOG_MSG("[impSearchSensor] Already processed \n");
if (BAD_SENSOR_INDEX != m_mainSensorIdx) {
sensorDevs |= SENSOR_MAIN;
}
if (BAD_SENSOR_INDEX != m_subSensorIdx) {
sensorDevs |= SENSOR_SUB;
}
#ifdef ATVCHIP_MTK_ENABLE
sensorDevs |= SENSOR_ATV;
#endif
return sensorDevs;
}
GetSensorInitFuncList(&m_pstSensorInitFunc);//----(1)获取hal层的sensor列表
LOG_MSG("SENSOR search start \n");
if (-1 != m_fdSensor) {
::close(m_fdSensor);
m_fdSensor = -1;
}
sprintf(cBuf,"/dev/%s",CAMERA_HW_DEVNAME);
m_fdSensor = ::open(cBuf, O_RDWR);
if (m_fdSensor < 0) {
LOG_ERR("[impSearchSensor]: error opening %s: %s \n", cBuf, strerror(errno));
return sensorDevs;
}
LOG_MSG("[impSearchSensor] m_fdSensor = %d \n", m_fdSensor);
// search main/main_2/sub 3 sockets
#ifdef MTK_SUB_IMGSENSOR
for (SensorEnum = DUAL_CAMERA_MAIN_SENSOR; SensorEnum <= DUAL_CAMERA_SUB_SENSOR; SensorEnum <<= 1) {
LOG_MSG("impSearchSensor search to sub\n");
#else
for (SensorEnum = DUAL_CAMERA_MAIN_SENSOR; SensorEnum < DUAL_CAMERA_SUB_SENSOR; SensorEnum <<= 1) {
LOG_MSG("impSearchSensor search to main\n");
#endif
//skip atv case
if ( 0x04 == SensorEnum ) continue;
//
for (i = 0; i < MAX_NUM_OF_SUPPORT_SENSOR; i++) {
//end of driver list
if (m_pstSensorInitFunc[i].getCameraDefault == NULL) {
LOG_MSG("m_pstSensorInitFunc[i].getCameraDefault is NULL: %d \n", i);
break;
}
//set sensor driver
id[KDIMGSENSOR_INVOKE_DRIVER_0] = (SensorEnum << KDIMGSENSOR_DUAL_SHIFT) | i;
LOG_MSG("set sensor driver id =%x\n", id[KDIMGSENSOR_INVOKE_DRIVER_0]);
err = ioctl(m_fdSensor, KDIMGSENSORIOC_X_SET_DRIVER,&id[KDIMGSENSOR_INVOKE_DRIVER_0] );//--(2)调用kernel层的kdSetDriver函数
if (err < 0) {
LOG_ERR("ERROR:KDCAMERAHWIOC_X_SET_DRIVER\n");
}
//err = open();
err = ioctl(m_fdSensor, KDIMGSENSORIOC_T_CHECK_IS_ALIVE);//---(3)上下电camera并读取sensor的ID，如果匹配则成功
if (err < 0) {
LOG_MSG("[impSearchSensor] Err-ctrlCode (%s) \n", strerror(errno));//
}
//
sensorType = this->getCurrentSensorType((SENSOR_DEV_ENUM)SensorEnum);
//
socketPos = this->getSocketPosition((CAMERA_DUAL_CAMERA_SENSOR_ENUM)SensorEnum);
//check extra ID , from EEPROM maybe
//may need to keep power here
if (NULL != pExIdChkCbf) {
err2 = pExIdChkCbf();
if (err2 < 0) {
LOG_ERR("Error:pExIdChkCbf() \n");
}
}
//power off sensor
close();
if (err < 0 || err2 < 0) {
LOG_MSG("sensor ID mismatch\n");
}
else {
if (SensorEnum == DUAL_CAMERA_MAIN_SENSOR) {
//m_mainSensorIdx = i;
//m_mainSensorId = m_pstSensorInitFunc[m_mainSensorIdx].SensorId;
m_mainSensorDrv.index[m_mainSensorDrv.number] = i;
m_mainSensorDrv.type[m_mainSensorDrv.number] = sensorType;
if ( IMAGE_SENSOR_TYPE_RAW == sensorType && BAD_SENSOR_INDEX == m_mainSensorDrv.firstRawIndex ) {
m_mainSensorDrv.firstRawIndex = i;
}
else if ( IMAGE_SENSOR_TYPE_YUV == sensorType && BAD_SENSOR_INDEX == m_mainSensorDrv.firstYuvIndex ) {
m_mainSensorDrv.firstYuvIndex = i;
}
m_mainSensorDrv.position = socketPos;
m_mainSensorDrv.sensorID = m_pstSensorInitFunc[m_mainSensorDrv.index[m_mainSensorDrv.number]].SensorId;
// LOG_MSG("MAIN sensor m_mainSensorDrv.number=%d, m_mainSensorDrv.index=%d\n",m_mainSensorDrv.number,m_mainSensorDrv.index[m_mainSensorDrv.number]);
m_mainSensorDrv.number++;
//
m_pMainSensorInfo = m_pstSensorInitFunc[i].pSensorInfo;
if ( m_pMainSensorInfo )
{
NSFeature::SensorInfoBase* pSensorInfo = m_pstSensorInitFunc[i].pSensorInfo;
LOG_MSG("found <%#x/%s/%s>", pSensorInfo->GetID(), pSensorInfo->getDrvName(), pSensorInfo->getDrvMacroName());
}
else
{
LOG_WRN("m_pMainSensorInfo==NULL\n");
}
LOG_MSG("MAIN sensor found:[%d]/[0x%x]/[%d]/[%d] \n",i,id[KDIMGSENSOR_INVOKE_DRIVER_0],sensorType,socketPos);
//break;
}
else if (SensorEnum == DUAL_CAMERA_SUB_SENSOR) {
//m_subSensorIdx = i;
//m_subSensorId = m_pstSensorInitFunc[m_subSensorIdx].SensorId;
m_subSensorDrv.index[m_subSensorDrv.number] = i;
m_subSensorDrv.type[m_subSensorDrv.number] = sensorType;
if ( IMAGE_SENSOR_TYPE_RAW == sensorType && BAD_SENSOR_INDEX == m_subSensorDrv.firstRawIndex ) {
m_subSensorDrv.firstRawIndex = i;
}
else if ( IMAGE_SENSOR_TYPE_YUV == sensorType && BAD_SENSOR_INDEX == m_subSensorDrv.firstYuvIndex ) {
m_subSensorDrv.firstYuvIndex = i;
}
m_subSensorDrv.position = socketPos;
m_subSensorDrv.sensorID = m_pstSensorInitFunc[m_subSensorDrv.index[m_subSensorDrv.number]].SensorId;
//LOG_MSG("SUB sensor m_subSensorDrv.number=%d, m_subSensorDrv.index=%d\n",m_subSensorDrv.number,m_subSensorDrv.index[m_subSensorDrv.number]);
m_subSensorDrv.number++;
//
m_pSubSensorInfo = m_pstSensorInitFunc[i].pSensorInfo;
if ( m_pSubSensorInfo )
{
NSFeature::SensorInfoBase* pSensorInfo = m_pstSensorInitFunc[i].pSensorInfo;
LOG_MSG("found <%#x/%s/%s>", pSensorInfo->GetID(), pSensorInfo->getDrvName(), pSensorInfo->getDrvMacroName());
}
else
{
LOG_WRN("m_pSubSensorInfo==NULL\n");
}
LOG_MSG("SUB sensor found:[%d]/[0x%x]/[%d]/[%d] \n",i,id[KDIMGSENSOR_INVOKE_DRIVER_0],sensorType,socketPos);
//break;
}
}//
}
}
//close system call may be off sensor power. check first!!!
::close(m_fdSensor);
m_fdSensor = -1;
//
if (BAD_SENSOR_INDEX != m_mainSensorDrv.index[0]) {
m_mainSensorId = m_mainSensorDrv.sensorID;
//init to choose first
m_mainSensorIdx = m_mainSensorDrv.index[0];
sensorDevs |= SENSOR_MAIN;
}
if (BAD_SENSOR_INDEX != m_subSensorDrv.index[0]) {
m_subSensorId = m_subSensorDrv.sensorID;
//init to choose first
m_subSensorIdx = m_subSensorDrv.index[0];
sensorDevs |= SENSOR_SUB;
}
#ifdef ATVCHIP_MTK_ENABLE
sensorDevs |= SENSOR_ATV;
#endif
if (sensorDevs == SENSOR_NONE) {
LOG_ERR( "Error No sensor found!! \n");
}
//
LOG_MSG("SENSOR search end: 0x%x /[0x%x][%d]/[0x%x][%d]\n", sensorDevs,
m_mainSensorId,m_mainSensorIdx,m_subSensorId,m_subSensorIdx);
return sensorDevs;
}//

(1)、获取hal层sensor列表GetSensorInitFuncList(&m_pstSensorInitFunc);

===>mediatek/custom/common/hal/imgsensor/src/sensorlist.cpp

[cpp] view plain copy

UINT32 GetSensorInitFuncList(MSDK_SENSOR_INIT_FUNCTION_STRUCT **ppSensorList)
{
if (NULL == ppSensorList) {
ALOGE("ERROR: NULL pSensorList\n");
return MHAL_UNKNOWN_ERROR;
}
*ppSensorList = &SensorList[0];//这里直接调用hal层的sensor列表
return MHAL_NO_ERROR;
} // GetSensorInitFuncList()

===>mediatek/custom/common/hal/imgsensor/src/sensorlist.cpp

[cpp] view plain copy

MSDK_SENSOR_INIT_FUNCTION_STRUCT SensorList[] =
{
//add by zym
#if defined(GC2235_MIPI_RAW)
RAW_INFO(GC2235MIPI_SENSOR_ID, SENSOR_DRVNAME_GC2235_MIPI_RAW, NULL),
#endif
// add by zhouzuoyu
#if defined(GC2235_KOTECH_MIPI_RAW)
RAW_INFO(GC2235MIPI_SENSOR_ID, SENSOR_DRVNAME_GC2235_MIPI_RAW, NULL),
#endif
#if defined(OV16825_MIPI_RAW)
RAW_INFO(OV16825MIPI_SENSOR_ID, SENSOR_DRVNAME_OV16825_MIPI_RAW,NULL),
#endif
#if defined(IMX135_MIPI_RAW)
RAW_INFO(IMX135_SENSOR_ID, SENSOR_DRVNAME_IMX135_MIPI_RAW,NULL),
#endif
#if defined(OV8830_RAW)
RAW_INFO(OV8830_SENSOR_ID, SENSOR_DRVNAME_OV8830_RAW, NULL),
#endif
/* ADD sensor driver before this line */
{0,{0},NULL, NULL, NULL}//end of list
};

(2)、获取kernel层的kdSetDriver函数err = ioctl(m_fdSensor, KDIMGSENSORIOC_X_SET_DRIVER,&id[KDIMGSENSOR_INVOKE_DRIVER_0] );

===>mediatek/custom/mt6582/kernel/imgsensor/src/kd_sensorlist.c

[cpp] view plain copy

/*******************************************************************************
* kdSetDriver
********************************************************************************/
int kdSetDriver(unsigned int* pDrvIndex)
{
ACDK_KD_SENSOR_INIT_FUNCTION_STRUCT *pSensorList = NULL;
u32 drvIdx[KDIMGSENSOR_MAX_INVOKE_DRIVERS] = {0,0};
u32 i;
PK_XLOG_INFO("pDrvIndex:0x%08x/0x%08x \n",pDrvIndex[KDIMGSENSOR_INVOKE_DRIVER_0],pDrvIndex[KDIMGSENSOR_INVOKE_DRIVER_1]);
//set driver for MAIN or SUB sensor
if (0 != kdGetSensorInitFuncList(&pSensorList))//----（2.1）获取kernel层的sensor列表
{
PK_ERR("ERROR:kdGetSensorInitFuncList()\n");
return -EIO;
}
for ( i = KDIMGSENSOR_INVOKE_DRIVER_0; i < KDIMGSENSOR_MAX_INVOKE_DRIVERS ; i++ ) {
//
spin_lock(&kdsensor_drv_lock);
g_bEnableDriver[i] = FALSE;
g_invokeSocketIdx[i] = (CAMERA_DUAL_CAMERA_SENSOR_ENUM)((pDrvIndex[i] & KDIMGSENSOR_DUAL_MASK_MSB)>>KDIMGSENSOR_DUAL_SHIFT);
spin_unlock(&kdsensor_drv_lock);
drvIdx[i] = (pDrvIndex[i] & KDIMGSENSOR_DUAL_MASK_LSB);//----（2.2）g_invokeSocketIdx，drvIdx解释
//
if ( DUAL_CAMERA_NONE_SENSOR == g_invokeSocketIdx[i] ) { continue; }
//ToDo: remove print information
PK_XLOG_INFO("[kdSetDriver] i,g_invokeSocketIdx[%d] = %d :\n",i,i,drvIdx[i]);
PK_XLOG_INFO("[kdSetDriver] i,drvIdx[%d] = %d :\n",i,i,drvIdx[i]);
//
if ( MAX_NUM_OF_SUPPORT_SENSOR > drvIdx[i] ) {
if (NULL == pSensorList[drvIdx[i]].SensorInit) {
PK_ERR("ERROR:kdSetDriver()\n");
return -EIO;
}
pSensorList[drvIdx[i]].SensorInit(&g_pInvokeSensorFunc[i]);//----（2.3）获取指定sensor的fun函数，例如ov5670的func
if (NULL == g_pInvokeSensorFunc[i]) {
PK_ERR("ERROR:NULL g_pSensorFunc[%d]\n",i);
return -EIO;
}
//
spin_lock(&kdsensor_drv_lock);
g_bEnableDriver[i] = TRUE;
spin_unlock(&kdsensor_drv_lock);
//get sensor name
memcpy((char*)g_invokeSensorNameStr[i],(char*)pSensorList[drvIdx[i]].drvname,sizeof(pSensorList[drvIdx[i]].drvname));
//return sensor ID
//pDrvIndex[0] = (unsigned int)pSensorList[drvIdx].SensorId;
PK_XLOG_INFO("[kdSetDriver] :[%d][%d][%d][%s][%d]\n",i,g_bEnableDriver[i],g_invokeSocketIdx[i],g_invokeSensorNameStr[i],sizeof(pSensorList[drvIdx[i]].drvname));
}
}
return 0;
}

（2.1）获取kernel层的sensor列表kdGetSensorInitFuncList(&pSensorList)

===>mediatek/custom/mt6582/kernel/imgsensor/src/kd_sensorlist.c

[cpp] view plain copy

/*******************************************************************************
* general camera image sensor kernel driver
*******************************************************************************/
UINT32 kdGetSensorInitFuncList(ACDK_KD_SENSOR_INIT_FUNCTION_STRUCT **ppSensorList)
{
if (NULL == ppSensorList)
{
PK_DBG("[kdGetSensorInitFuncList]ERROR: NULL ppSensorList\n");
return 1;
}
*ppSensorList = &kdSensorList[0];
return 0;
} // kdGetSensorInitFuncList()

===>mediatek/custom/mt6582/kernel/imgsensor/src/kd_sensorlist.h

hal层和kernel层的sensor列表顺序必须保持一致

[cpp] view plain copy

ACDK_KD_SENSOR_INIT_FUNCTION_STRUCT kdSensorList[MAX_NUM_OF_SUPPORT_SENSOR+1] =
{
//add by zym
#if defined(GC2235_MIPI_RAW)
{GC2235MIPI_SENSOR_ID, SENSOR_DRVNAME_GC2235_MIPI_RAW, GC2235MIPISensorInit},
#endif
// add by zhouzuoyu
#if defined(GC2235_KOTECH_MIPI_RAW)
{GC2235MIPI_SENSOR_ID, SENSOR_DRVNAME_GC2235_MIPI_RAW, GC2235MIPISensorInit},
#endif
#if defined(OV16825_MIPI_RAW)
{OV16825MIPI_SENSOR_ID, SENSOR_DRVNAME_OV16825_MIPI_RAW, OV16825MIPISensorInit},
#endif
#if defined(IMX135_MIPI_RAW)
{IMX135_SENSOR_ID, SENSOR_DRVNAME_IMX135_MIPI_RAW, IMX135_MIPI_RAW_SensorInit},
#endif
#if defined(OV8830_RAW)
{OV8830_SENSOR_ID, SENSOR_DRVNAME_OV8830_RAW, OV8830SensorInit},
#endif
/* ADD sensor driver before this line */
{0,{0},NULL}, //end of list
};
//e_add new sensor driver here

（2.2）g_invokeSocketIdx，drvIdx解释

上层传下来的 id 参数解析成两部分 g_invokeSocketIdx 区分目前正在匹配的是 main 还是sub，drvIdx 是 sensor 列表的序列号。

（2.3）获取指定sensor的func函数，例如ov5670的func，pSensorList[drvIdx[i]].SensorInit(&g_pInvokeSensorFunc[i]);

调用的函数是OV5670_MIPI_RAW_SensorInit()。

[cpp] view plain copy

#if defined(OV5670_MIPI_RAW)
{OV5670_SENSOR_ID, SENSOR_DRVNAME_OV5670_MIPI_RAW, OV5670_MIPI_RAW_SensorInit},
#endif

===>mediatek/custom/common/kernel/imgsensor/ov5670_mipi_raw/ov5670mipiraw_Sensor.c

[cpp] view plain copy

SENSOR_FUNCTION_STRUCT SensorFuncOV5670=
{
OV5670Open,
OV5670GetInfo,
OV5670GetResolution,
OV5670FeatureControl,
OV5670Control,
OV5670Close
};
UINT32 OV5670_MIPI_RAW_SensorInit(PSENSOR_FUNCTION_STRUCT *pfFunc)//---调用此函数
{
if (pfFunc!=NULL)
*pfFunc=&SensorFuncOV5670;
return ERROR_NONE;
}

5670的sensorinit实现，主要是未了pfFunc这个函数指针的结构体指针赋值，这样我们就实现了驱动代码的分离，hal层只需要调用sensorlist.c这样一个虚拟设备的驱动，就可以和具体的Sensor Driver驱动通信。这样的做法与platform driver的设计思想差不多，在tp，lcm等驱动中也有体现。

（3）上下电camera并读取ID，err = ioctl(m_fdSensor, KDIMGSENSORIOC_T_CHECK_IS_ALIVE);

===>mediatek/custom/mt6582/kernel/imgsensor/src/kd_sensorlist.c

[cpp] view plain copy

/*******************************************************************************
* adopt_CAMERA_HW_CheckIsAlive
********************************************************************************/
inline static int adopt_CAMERA_HW_CheckIsAlive(void)
{
UINT32 err = 0;
UINT32 err1 = 0;
UINT32 i = 0;
MUINT32 sensorID = 0;
MUINT32 retLen = 0;
KD_IMGSENSOR_PROFILE_INIT();
//power on sensor
kdModulePowerOn((CAMERA_DUAL_CAMERA_SENSOR_ENUM*)g_invokeSocketIdx, g_invokeSensorNameStr,true, CAMERA_HW_DRVNAME1);//----（3.1）sensor上电
//wait for power stable
mDELAY(10);
KD_IMGSENSOR_PROFILE("kdModulePowerOn");
if (g_pSensorFunc) {
for ( i = KDIMGSENSOR_INVOKE_DRIVER_0 ; i < KDIMGSENSOR_MAX_INVOKE_DRIVERS ; i++ ) {
if(DUAL_CAMERA_NONE_SENSOR != g_invokeSocketIdx[i]){
err = g_pSensorFunc->SensorFeatureControl(g_invokeSocketIdx[i], SENSOR_FEATURE_CHECK_SENSOR_ID, (MUINT8*)&sensorID, &retLen);//---（3.2）获取sensor ID
if (sensorID == 0) { //not implement this feature ID
PK_DBG(" Not implement!!, use old open function to check\n");
err = ERROR_SENSOR_CONNECT_FAIL;
}
else if (sensorID == 0xFFFFFFFF) { //fail to open the sensor
PK_DBG(" No Sensor Found");
err = ERROR_SENSOR_CONNECT_FAIL;
}
else {
PK_DBG(" Sensor found ID = 0x%x\n", sensorID);
err = ERROR_NONE;
}
if(ERROR_NONE != err)
{
PK_DBG("ERROR:adopt_CAMERA_HW_CheckIsAlive(), No imgsensor alive \n");
}
}
}
}
else {
PK_DBG("ERROR:NULL g_pSensorFunc\n");
}
//reset sensor state after power off
err1 = g_pSensorFunc->SensorClose();
if(ERROR_NONE != err1) {
PK_DBG("SensorClose \n");
}
//
kdModulePowerOn((CAMERA_DUAL_CAMERA_SENSOR_ENUM*)g_invokeSocketIdx, g_invokeSensorNameStr, false, CAMERA_HW_DRVNAME1);
//
KD_IMGSENSOR_PROFILE("CheckIsAlive");
return err?-EIO:err;
} /* adopt_CAMERA_HW_Open() */

(3.1)Sensor 上电， kdModulePowerOn((CAMERA_DUAL_CAMERA_SENSOR_ENUM*)g_invokeSocketIdx, g_invokeSensorNameStr,true, CAMERA_HW_DRVNAME1);

[cpp] view plain copy

/*******************************************************************************
* kdModulePowerOn
********************************************************************************/
int
kdModulePowerOn(
CAMERA_DUAL_CAMERA_SENSOR_ENUM socketIdx[KDIMGSENSOR_MAX_INVOKE_DRIVERS],
char sensorNameStr[KDIMGSENSOR_MAX_INVOKE_DRIVERS][32],
BOOL On,
char* mode_name )
{
MINT32 ret = ERROR_NONE;
u32 i = 0;
for ( i = KDIMGSENSOR_INVOKE_DRIVER_0 ; i < KDIMGSENSOR_MAX_INVOKE_DRIVERS ; i++ ) {
if ( g_bEnableDriver[i] ) {
//PK_XLOG_INFO("[%s][%d][%d][%s][%s]\r\n",__FUNCTION__,g_bEnableDriver[i],socketIdx[i],sensorNameStr[i],mode_name);
ret = kdCISModulePowerOn(socketIdx[i],sensorNameStr[i],On,mode_name);//实际上电的func
if ( ERROR_NONE != ret ) {
PK_ERR("[%s]",__FUNCTION__);
return ret;
}
}
}
return ERROR_NONE;
}

===>mediatek/custom/huaqin82_slwt_2s_td/kernel/camera/camera/kd_camera_hw.c

[cpp] view plain copy

int kdCISModulePowerOn(CAMERA_DUAL_CAMERA_SENSOR_ENUM SensorIdx, char *currSensorName, BOOL On, char* mode_name)
{
PK_DBG("[camera] **kdCISModulePowerOn:SensorIdx:%d,pinSetIdx:%d",SensorIdx,pinSetIdx);
//dump_stack();
if (DUAL_CAMERA_MAIN_SENSOR == SensorIdx){
if (currSensorName &&
((0 == strcmp(SENSOR_DRVNAME_OV5648_MIPI_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_OV88251_MIPI_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_OV88252_MIPI_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_S5K3H7Y_MIPI_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_S5K3H7Y_2LANE_MIPI_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_S5K4E1GA_MIPI_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_GC2235_MIPI_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_HI258MIPI_YUV,currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_OV8858_MIPI_RAW,currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_T4K35_MIPI_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_HI544_MIPI_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_A5142_MIPI_RAW, currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_OV2680_MIPI_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_OV5648_LARGEN_MIPI_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_GC0310_MIPI_YUV, currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_GC2145_MIPI_YUV, currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_S5K4H5YX_MIPI_RAW, currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_OV5670_MIPI_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_HI551_MIPI_RAW,currSensorName))
//|| to add other main camera here
))
pinSetIdx = 0;
else
{
PK_DBG("[ryf-main]kdCISModulePowerOn get in--- sensorIdx not compare with sensor name: %s\n", currSensorName);
//if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC2035_YUV,currSensorName)))
//{
// pinSetIdx = 1;
//}
//else{
goto _kdCISModulePowerOn_exit_;
//}
}
}
else if (DUAL_CAMERA_SUB_SENSOR == SensorIdx) {
if (currSensorName &&
((0 == strcmp(SENSOR_DRVNAME_GC2035_YUV,currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_S5K3H72Y_MIPI_RAW,currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_S5K3H7Y_2LANE_MIPI_RAW, currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_OV5648A_MIPI_RAW,currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_OV5648B_MIPI_RAW,currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_GC0329_YUV,currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_GC2235_MIPI_RAW,currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_OV5648_MIPI_RAW,currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_GC2235_RAW,currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_A5142_MIPI_RAW, currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_GC0312_YUV, currSensorName))
||(0 == strcmp(SENSOR_DRVNAME_HI704_YUV, currSensorName))
//||(0 == strcmp(SENSOR_DRVNAME_GC0310_MIPI_YUV, currSensorName))
//|| to add other sub camera here
))
pinSetIdx = 1;
else
{
//if (currSensorName &&
//((0 == strcmp(SENSOR_DRVNAME_OV5648_MIPI_RAW,currSensorName))
//|| to add other main camera here
//))
//{
// pinSetIdx = 0;
//}
PK_DBG("{ryf-sub}kdCISModulePowerOn get in--- sensorIdx not compare with sensro:%s\n",currSensorName);
goto _kdCISModulePowerOn_exit_;
}
}
else if (DUAL_CAMERA_MAIN_2_SENSOR == SensorIdx) {
// pinSetIdx = 2;
}
PK_DBG("kdCISModulePowerOn:SensorIdx:%d,pinSetIdx:%d",SensorIdx,pinSetIdx);
Rst_PDN_Init();
//power ON
if (On)
{
PK_DBG("kdCISModulePowerOn -on:currSensorName=%s\n",currSensorName);
if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV5648_MIPI_RAW,currSensorName))) {
PK_DBG("is ov5648mipi on\n");
if (0 == pinSetIdx) {
if (TRUE != kd_ov5648_main_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (1 == pinSetIdx) {
if (TRUE != kd_ov5648_sub_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_S5K4E1GA_MIPI_RAW,currSensorName)))
{
PK_DBG("is s5k4e1ga on \n");
if(TRUE != kd_s5k4e1gamipi_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_HI544_MIPI_RAW,currSensorName)))
{
PK_DBG("is hi544 on \n");
if(TRUE != kd_hi544raw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC2235_MIPI_RAW,currSensorName)))
{
PK_DBG("is gc2235 on\n");
if(TRUE != kd_gc2235mipiraw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC2235_RAW,currSensorName))) {
PK_DBG("is gc2235_raw on\n");
if (TRUE != kd_gc2235raw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
/* else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_HI253_YUV,currSensorName)))
{
PK_DBG("is hi253 on\n");
if(TRUE != kd_hi253yuv_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}*/
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV88251_MIPI_RAW,currSensorName))) {
PK_DBG("is ov88251 on \n");
if(TRUE != kd_ov88251mipiraw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV88252_MIPI_RAW,currSensorName))) {
PK_DBG("is ov88252 on \n");
if(TRUE != kd_ov88252mipiraw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV8858_MIPI_RAW,currSensorName))) {
PK_DBG("is ov8858 on \n");
kd_a5142mipiraw_sub_poweron(mode_name);
kd_a5142mipiraw_sub_powerdown(mode_name);
if(TRUE != kd_ov8858mipiraw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_S5K4H5YX_MIPI_RAW,currSensorName))) {
PK_DBG("is s5k4h5yx on \n");
kd_a5142mipiraw_sub_poweron(mode_name);
kd_a5142mipiraw_sub_powerdown(mode_name);
if (TRUE != kd_s5k4h5yxmipiraw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_T4K35_MIPI_RAW,currSensorName))) {
PK_DBG("is t4k35 on \n");
if(TRUE != kd_t4k35mipiraw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (currSensorName && ((0 == strcmp(SENSOR_DRVNAME_S5K3H7Y_MIPI_RAW,currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_S5K3H7Y_2LANE_MIPI_RAW,currSensorName)))) {
if(pinSetIdx==0)
{
if(TRUE != kd_s5k3h7ymipiraw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else
{
if(TRUE != kd_s5k3h72ymipiraw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
} else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC2035_YUV,currSensorName))) {
PK_DBG("is gc2035 on\n");
if(TRUE != kd_gc2035_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV5648A_MIPI_RAW,currSensorName)))
{
if(TRUE != kd_ov5648a_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV5670_MIPI_RAW,currSensorName)))
{
if(TRUE != kd_ov5670_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_HI551_MIPI_RAW,currSensorName)))
{
if(TRUE != kd_hi551_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV5648B_MIPI_RAW,currSensorName)))
{
if(TRUE != kd_ov5648b_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV5648_LARGEN_MIPI_RAW,currSensorName))) //lili add
{
if(TRUE != kd_ov5648_main_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_S5K3H72Y_MIPI_RAW,currSensorName))) {
PK_DBG("is s5k3h72ymipi on\n");
if(TRUE != kd_s5k3h72ymipiraw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC0329_YUV,currSensorName)))
{
PK_DBG("is gc0329 on\n");
if(TRUE != kd_gc0329_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_A5142_MIPI_RAW, currSensorName))) {
if (0 == pinSetIdx) {
PK_DBG("is A5142 main on \n");
if(TRUE != kd_a5142mipiraw_main_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
} else {
PK_DBG("is A5142 sub on \n");
if(TRUE != kd_a5142mipiraw_sub_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
}else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC0312_YUV,currSensorName)))
{
PK_DBG("is gc0312 on\n");
if(TRUE != kd_gc0312_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_HI704_YUV,currSensorName)))
{
PK_DBG("is hi704 on\n");
if(TRUE != kd_hi704yuv_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC0310_MIPI_YUV,currSensorName)))
{
PK_DBG("is gc0310 on\n");
if(TRUE != kd_gc0310_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC2145_MIPI_YUV,currSensorName))) {
PK_DBG("is gc2145 on\n");
if (TRUE != kd_gc2145_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_HI258MIPI_YUV,currSensorName)))
{
PK_DBG("is hi258 on \n");
if(TRUE != kd_hi258mipiraw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV2680_MIPI_RAW,currSensorName))) {
PK_DBG("is ov2680 on \n");
if(TRUE != kd_ov2680mipiraw_poweron(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else
{
PK_DBG("kdCISModulePowerOn get in--- other , please add the power on code!!!!!!\n");
goto _kdCISModulePowerOn_exit_;
}
}
else {//power OFF
PK_DBG("kdCISModulePowerOn -off:currSensorName=%s\n",currSensorName);
if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV5648_MIPI_RAW,currSensorName)))
{
PK_DBG("is ov5648_mipi_raw down\n");
if (0 == pinSetIdx) {
if(TRUE != kd_ov5648_main_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (1 == pinSetIdx) {
if(TRUE != kd_ov5648_sub_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
} else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_S5K4E1GA_MIPI_RAW,currSensorName)))
{
PK_DBG("is s5k4e1ga down\n");
if(TRUE != kd_s5k4e1gamipi_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_HI544_MIPI_RAW,currSensorName)))
{
PK_DBG("is hi544 down\n");
if(TRUE != kd_hi544raw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV88251_MIPI_RAW,currSensorName)))
{
PK_DBG("is ov88251 down\n");
if(TRUE != kd_ov88251mipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV5670_MIPI_RAW,currSensorName)))
{
PK_DBG("is ov5670 down\n");
if(TRUE != kd_ov5670mipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_HI551_MIPI_RAW,currSensorName)))
{
PK_DBG("is hi551 down\n");
if(TRUE != kd_hi551mipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV88252_MIPI_RAW,currSensorName)))
{
PK_DBG("is ov88252 down\n");
if(TRUE != kd_ov88252mipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV8858_MIPI_RAW,currSensorName))) {
PK_DBG("is ov8858 down\n");
if(TRUE != kd_ov8858mipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_S5K4H5YX_MIPI_RAW, currSensorName))) {
PK_DBG("is s5k4h5yx down\n");
if (TRUE != kd_s5k4h5yxmipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_T4K35_MIPI_RAW,currSensorName))) {
PK_DBG("is t4k35 down\n");
if(TRUE != kd_t4k35mipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC2235_MIPI_RAW,currSensorName)))
{
PK_DBG("is gc2235 down\n");
if(TRUE != kd_gc2235mipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC2235_RAW,currSensorName))) {
PK_DBG("is gc2235 down\n");
if (TRUE != kd_gc2235raw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
/* else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_HI253_YUV,currSensorName)))
{
PK_DBG("is hi253 down\n");
if(TRUE != kd_hi253yuv_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}*/
else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_A5142_MIPI_RAW, currSensorName))) {
if (0 == pinSetIdx) {
PK_DBG("is A5142 main down \n");
if (TRUE != kd_a5142mipiraw_main_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
} else {
PK_DBG("is A5142 sub down \n");
if (TRUE != kd_a5142mipiraw_sub_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
} else if (currSensorName && ((0 == strcmp(SENSOR_DRVNAME_S5K3H7Y_MIPI_RAW,currSensorName))
|| (0 == strcmp(SENSOR_DRVNAME_S5K3H7Y_2LANE_MIPI_RAW,currSensorName))))
{
PK_DBG("is s5k3h7 down\n");
if(pinSetIdx==0)
{
if(TRUE != kd_s5k3h7ymipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else {
if(TRUE != kd_s5k3h72ymipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC2035_YUV,currSensorName)))
{
PK_DBG("is gc2035 down\n");
if(TRUE != kd_gc2035_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_S5K3H72Y_MIPI_RAW,currSensorName)))
{
PK_DBG("is s5k3h72y_mipi_raw down\n");
if(TRUE != kd_s5k3h72ymipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV5648A_MIPI_RAW,currSensorName)))
{
if(TRUE != kd_ov5648a_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV5648B_MIPI_RAW,currSensorName)))
{
if(TRUE != kd_ov5648b_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV5648_LARGEN_MIPI_RAW,currSensorName))) //lili add
{
if(TRUE != kd_ov5648_main_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC0329_YUV,currSensorName)))
{
PK_DBG("is gc0329 down\n");
if(TRUE != kd_gc0329yuv_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC0312_YUV,currSensorName)))
{
PK_DBG("is gc0312 down\n");
if(TRUE != kd_gc0312_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_HI704_YUV,currSensorName)))
{
PK_DBG("is hi704 down\n");
if(TRUE != kd_hi704yuv_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC0310_MIPI_YUV,currSensorName)))
{
PK_DBG("is gc0310 down\n");
if(TRUE != kd_gc0310_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
} else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC2145_MIPI_YUV,currSensorName))) {
PK_DBG("is gc2145 down\n");
if (TRUE != kd_gc2145_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_HI258MIPI_YUV,currSensorName)))
{
PK_DBG("is hi258 down\n");
if(TRUE != kd_hi258mipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else if (currSensorName && (0 == strcmp(SENSOR_DRVNAME_OV2680_MIPI_RAW,currSensorName)))
{
PK_DBG("is ov2680 down\n");
if(TRUE != kd_ov2680mipiraw_powerdown(mode_name))
goto _kdCISModulePowerOn_exit_;
}
else
{
PK_DBG("kdCISModulePowerDown get in--- other , please add the power down code!!!!!!\n");
goto _kdCISModulePowerOn_exit_;
}
}
return 0;
_kdCISModulePowerOn_exit_:
return -EIO;
}
EXPORT_SYMBOL(kdCISModulePowerOn);

以ov5670为例，其上电code如下：

[cpp] view plain copy

static int kd_ov5670_poweron( char *mode_name)
{
int ret;
printk("kd_ov5670_poweron1 start..\n");
ret = kd_poweron_main_devices(VOL_1800, VOL_2800, VOL_1200, VOL_2800, mode_name,0);//给camera上三路电
PK_DBG("kd_ov88251mipiraw_poweron start..\n");
mdelay(10);// wait power to be stable
//disable_inactive_sensor();//disable inactive sensor
if(mt_set_gpio_out(pinSet[0][IDX_PS_CMPDN],pinSet[0][IDX_PS_CMPDN+IDX_PS_OFF])){PK_DBG("[CAMERA LENS] set gpio failed!! \n");}
mdelay(10);
if(mt_set_gpio_out(pinSet[0][IDX_PS_CMPDN],pinSet[0][IDX_PS_CMPDN+IDX_PS_ON])){PK_DBG("[CAMERA LENS] set gpio failed!! \n");}
mdelay(1);
if(mt_set_gpio_out(pinSet[0][IDX_PS_CMRST],pinSet[0][IDX_PS_CMRST+IDX_PS_ON])){PK_DBG("[CAMERA SENSOR] set gpio failed!! \n");}
if(mt_set_gpio_out(pinSet[0][IDX_PS_CMRST],pinSet[0][IDX_PS_CMRST+IDX_PS_OFF])){PK_DBG("[CAMERA SENSOR] set gpio failed!! \n");}
mdelay(10);
if(mt_set_gpio_out(pinSet[0][IDX_PS_CMRST],pinSet[0][IDX_PS_CMRST+IDX_PS_ON])){PK_DBG("[CAMERA SENSOR] set gpio failed!! \n");}
mdelay(5);
poweronerr:
return ret;
}

(3.2)获取sensor ID，err = g_pSensorFunc->SensorFeatureControl(g_invokeSocketIdx[i], SENSOR_FEATURE_CHECK_SENSOR_ID, (MUINT8*)&sensorID, &retLen);

此函数调用具体sensor的func，例如ov5670，则调用的

[cpp] view plain copy

OV5670FeatureControl

===>mediatek/custom/common/kernel/imgsensor/ov5670_mipi_raw

[cpp] view plain copy

UINT32 OV5670FeatureControl(MSDK_SENSOR_FEATURE_ENUM FeatureId,
UINT8 *pFeaturePara,UINT32 *pFeatureParaLen)
{
UINT16 *pFeatureReturnPara16=(UINT16 *) pFeaturePara;
UINT16 *pFeatureData16=(UINT16 *) pFeaturePara;
UINT32 *pFeatureReturnPara32=(UINT32 *) pFeaturePara;
UINT32 *pFeatureData32=(UINT32 *) pFeaturePara;
UINT32 SensorRegNumber;
UINT32 i;
PNVRAM_SENSOR_DATA_STRUCT pSensorDefaultData=(PNVRAM_SENSOR_DATA_STRUCT) pFeaturePara;
MSDK_SENSOR_CONFIG_STRUCT *pSensorConfigData=(MSDK_SENSOR_CONFIG_STRUCT *) pFeaturePara;
MSDK_SENSOR_REG_INFO_STRUCT *pSensorRegData=(MSDK_SENSOR_REG_INFO_STRUCT *) pFeaturePara;
MSDK_SENSOR_GROUP_INFO_STRUCT *pSensorGroupInfo=(MSDK_SENSOR_GROUP_INFO_STRUCT *) pFeaturePara;
MSDK_SENSOR_ITEM_INFO_STRUCT *pSensorItemInfo=(MSDK_SENSOR_ITEM_INFO_STRUCT *) pFeaturePara;
MSDK_SENSOR_ENG_INFO_STRUCT *pSensorEngInfo=(MSDK_SENSOR_ENG_INFO_STRUCT *) pFeaturePara;
switch (FeatureId)
{
case SENSOR_FEATURE_GET_RESOLUTION:
*pFeatureReturnPara16++= OV5670_IMAGE_SENSOR_FULL_WIDTH;
*pFeatureReturnPara16= OV5670_IMAGE_SENSOR_FULL_HEIGHT;
*pFeatureParaLen=4;
break;
case SENSOR_FEATURE_GET_PERIOD:
*pFeatureReturnPara16++= OV5670_FeatureControl_PERIOD_PixelNum;
*pFeatureReturnPara16= OV5670_FeatureControl_PERIOD_LineNum;
*pFeatureParaLen=4;
break;
case SENSOR_FEATURE_GET_PIXEL_CLOCK_FREQ:
switch(OV5670CurrentScenarioId)
{
case MSDK_SCENARIO_ID_CAMERA_PREVIEW:
*pFeatureReturnPara32 = OV5670_PREVIEW_PCLK;
*pFeatureParaLen=4;
break;
case MSDK_SCENARIO_ID_VIDEO_PREVIEW:
*pFeatureReturnPara32 = OV5670_VIDEO_PCLK;
*pFeatureParaLen=4;
break;
case MSDK_SCENARIO_ID_CAMERA_CAPTURE_JPEG:
case MSDK_SCENARIO_ID_CAMERA_ZSD:
*pFeatureReturnPara32 = OV5670_CAPTURE_PCLK;
*pFeatureParaLen=4;
break;
default:
*pFeatureReturnPara32 = OV5670_PREVIEW_PCLK;
*pFeatureParaLen=4;
break;
}
break;
case SENSOR_FEATURE_SET_ESHUTTER:
OV5670_SetShutter(*pFeatureData16);
break;
case SENSOR_FEATURE_SET_NIGHTMODE:
OV5670_NightMode((BOOL) *pFeatureData16);
break;
case SENSOR_FEATURE_SET_GAIN:
OV5670_SetGain((UINT16) *pFeatureData16);
break;
case SENSOR_FEATURE_SET_FLASHLIGHT:
break;
case SENSOR_FEATURE_SET_ISP_MASTER_CLOCK_FREQ:
//OV5670_isp_master_clock=*pFeatureData32;
break;
case SENSOR_FEATURE_SET_REGISTER:
OV5670_write_cmos_sensor(pSensorRegData->RegAddr, pSensorRegData->RegData);
break;
case SENSOR_FEATURE_GET_REGISTER:
pSensorRegData->RegData = OV5670_read_cmos_sensor(pSensorRegData->RegAddr);
break;
case SENSOR_FEATURE_SET_CCT_REGISTER:
SensorRegNumber=FACTORY_END_ADDR;
for (i=0;i<SensorRegNumber;i++)
{
spin_lock(&ov5670mipiraw_drv_lock);
OV5670SensorCCT[i].Addr=*pFeatureData32++;
OV5670SensorCCT[i].Para=*pFeatureData32++;
spin_unlock(&ov5670mipiraw_drv_lock);
}
break;
case SENSOR_FEATURE_GET_CCT_REGISTER:
SensorRegNumber=FACTORY_END_ADDR;
if (*pFeatureParaLen<(SensorRegNumber*sizeof(SENSOR_REG_STRUCT)+4))
return FALSE;
*pFeatureData32++=SensorRegNumber;
for (i=0;i<SensorRegNumber;i++)
{
*pFeatureData32++=OV5670SensorCCT[i].Addr;
*pFeatureData32++=OV5670SensorCCT[i].Para;
}
break;
case SENSOR_FEATURE_SET_ENG_REGISTER:
SensorRegNumber=ENGINEER_END;
for (i=0;i<SensorRegNumber;i++)
{
spin_lock(&ov5670mipiraw_drv_lock);
OV5670SensorReg[i].Addr=*pFeatureData32++;
OV5670SensorReg[i].Para=*pFeatureData32++;
spin_unlock(&ov5670mipiraw_drv_lock);
}
break;
case SENSOR_FEATURE_GET_ENG_REGISTER:
SensorRegNumber=ENGINEER_END;
if (*pFeatureParaLen<(SensorRegNumber*sizeof(SENSOR_REG_STRUCT)+4))
return FALSE;
*pFeatureData32++=SensorRegNumber;
for (i=0;i<SensorRegNumber;i++)
{
*pFeatureData32++=OV5670SensorReg[i].Addr;
*pFeatureData32++=OV5670SensorReg[i].Para;
}
break;
case SENSOR_FEATURE_GET_REGISTER_DEFAULT:
if (*pFeatureParaLen>=sizeof(NVRAM_SENSOR_DATA_STRUCT))
{
pSensorDefaultData->Version=NVRAM_CAMERA_SENSOR_FILE_VERSION;
pSensorDefaultData->SensorId=OV5670_SENSOR_ID;
memcpy(pSensorDefaultData->SensorEngReg, OV5670SensorReg, sizeof(SENSOR_REG_STRUCT)*ENGINEER_END);
memcpy(pSensorDefaultData->SensorCCTReg, OV5670SensorCCT, sizeof(SENSOR_REG_STRUCT)*FACTORY_END_ADDR);
}
else
return FALSE;
*pFeatureParaLen=sizeof(NVRAM_SENSOR_DATA_STRUCT);
break;
case SENSOR_FEATURE_GET_CONFIG_PARA:
memcpy(pSensorConfigData, &OV5670SensorConfigData, sizeof(MSDK_SENSOR_CONFIG_STRUCT));
*pFeatureParaLen=sizeof(MSDK_SENSOR_CONFIG_STRUCT);
break;
case SENSOR_FEATURE_CAMERA_PARA_TO_SENSOR:
OV5670_camera_para_to_sensor();
break;
case SENSOR_FEATURE_SENSOR_TO_CAMERA_PARA:
OV5670_sensor_to_camera_para();
break;
case SENSOR_FEATURE_GET_GROUP_COUNT:
*pFeatureReturnPara32++=OV5670_get_sensor_group_count();
*pFeatureParaLen=4;
break;
case SENSOR_FEATURE_GET_GROUP_INFO:
OV5670_get_sensor_group_info(pSensorGroupInfo->GroupIdx, pSensorGroupInfo->GroupNamePtr, &pSensorGroupInfo->ItemCount);
*pFeatureParaLen=sizeof(MSDK_SENSOR_GROUP_INFO_STRUCT);
break;
case SENSOR_FEATURE_GET_ITEM_INFO:
OV5670_get_sensor_item_info(pSensorItemInfo->GroupIdx,pSensorItemInfo->ItemIdx, pSensorItemInfo);
*pFeatureParaLen=sizeof(MSDK_SENSOR_ITEM_INFO_STRUCT);
break;
case SENSOR_FEATURE_SET_ITEM_INFO:
OV5670_set_sensor_item_info(pSensorItemInfo->GroupIdx, pSensorItemInfo->ItemIdx, pSensorItemInfo->ItemValue);
*pFeatureParaLen=sizeof(MSDK_SENSOR_ITEM_INFO_STRUCT);
break;
case SENSOR_FEATURE_GET_ENG_INFO:
pSensorEngInfo->SensorId = 129;
pSensorEngInfo->SensorType = CMOS_SENSOR;
pSensorEngInfo->SensorOutputDataFormat=SENSOR_OUTPUT_FORMAT_RAW_Gb;
*pFeatureParaLen=sizeof(MSDK_SENSOR_ENG_INFO_STRUCT);
break;
case SENSOR_FEATURE_GET_LENS_DRIVER_ID:
// get the lens driver ID from EEPROM or just return LENS_DRIVER_ID_DO_NOT_CARE
// if EEPROM does not exist in camera module.
*pFeatureReturnPara32=LENS_DRIVER_ID_DO_NOT_CARE;
*pFeatureParaLen=4;
break;
case SENSOR_FEATURE_INITIALIZE_AF:
break;
case SENSOR_FEATURE_CONSTANT_AF:
break;
case SENSOR_FEATURE_MOVE_FOCUS_LENS:
break;
case SENSOR_FEATURE_SET_VIDEO_MODE:
OV5670SetVideoMode(*pFeatureData16);
break;
case SENSOR_FEATURE_CHECK_SENSOR_ID://-------------调用此处读取ID
OV5670GetSensorID(pFeatureReturnPara32);
break;
case SENSOR_FEATURE_SET_AUTO_FLICKER_MODE:
OV5670SetAutoFlickerMode((BOOL)*pFeatureData16, *(pFeatureData16+1));
break;
case SENSOR_FEATURE_SET_MAX_FRAME_RATE_BY_SCENARIO:
OV5670MIPISetMaxFramerateByScenario((MSDK_SCENARIO_ID_ENUM)*pFeatureData32, *(pFeatureData32+1));
break;
case SENSOR_FEATURE_GET_DEFAULT_FRAME_RATE_BY_SCENARIO:
OV5670MIPIGetDefaultFramerateByScenario((MSDK_SCENARIO_ID_ENUM)*pFeatureData32, (MUINT32 *)(*(pFeatureData32+1)));
break;
case SENSOR_FEATURE_SET_TEST_PATTERN:
OV5670SetTestPatternMode((BOOL)*pFeatureData16);
break;
case SENSOR_FEATURE_GET_TEST_PATTERN_CHECKSUM_VALUE://for factory mode auto testing
*pFeatureReturnPara32=OV5670_TEST_PATTERN_CHECKSUM;
*pFeatureParaLen=4;
break;
default:
break;
}
return ERROR_NONE;
}

[cpp] view plain copy

UINT32 OV5670GetSensorID(UINT32 *sensorID)
{
int retry = 2;
OV5670DB("OV5670GetSensorID enter :\n ");
mdelay(5);
do {
*sensorID = (OV5670_read_cmos_sensor(0x300B)<<8)|OV5670_read_cmos_sensor(0x300C);
if (*sensorID == OV5670_SENSOR_ID)
{
OV5670DB("Sensor ID = 0x%04x\n", *sensorID);
break;
}
OV5670DB("Read Sensor ID Fail = 0x%04x\n", *sensorID);
retry--;
} while (retry > 0);
if (*sensorID != OV5670_SENSOR_ID) {
OV5670DB("Read Sensor ID Fail = 0x%04x\n", *sensorID);
/*
*sensorID = OV5670_SENSOR_ID;
return ERROR_SENSOR_CONNECT_FAIL;
*/
*sensorID = 0xFFFFFFFF;
return ERROR_SENSOR_CONNECT_FAIL;
}
return ERROR_NONE;
}

以上是ov5670获取ID的函数。

三、开机打开sensor总结

HAL层运行Search sensor这个线程
HAL层遍历sensorlist列表并挂载HAL层性能3A等一些参数获取的接口
HAL层下达setDriver的cmd，并下传正在遍历的sensorlist列表中的ID
Driver层根据这个ID，挂载Driver层sensorlist中对应的Sensorlist中对应的Sensor和具体Sensor底层操作接口
HAL层对正确遍历的sensor下达check ID的指令
Driver层为对应sensor上电，通过I2C读取预存在寄存器中的sensor id
比较读取结果，不匹配，return error，继续遍历
匹配，HAL层下达其他指令收集sensor信息
sensor下电

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