摄像头移植简述(qcom)

这里以msm8939为例

1、将摄像头文件放到下面两个文件夹
vendor/qcom/proprietary/mm-camera/mm-camera2/media-controller/modules/sensors/sensor_libs/
vendor/qcom/proprietary/mm-camera/mm-camera2/media-controller/modules/sensors/chromatix/0301/libchromatix/

2、将上面的文件编译出来的模块添加到系统(grep -rinw LOCAL_MODULE *)

vendor/qcom/proprietary/common/config/device-vendor.mk,如MM_CAMERA += libmmcamera_gc2235_8916

3、定义初始化的sensor
vendor/qcom/proprietary/mm-camera/mm-camera2/media-controller/modules/sensors/module/sensor_init.c
#define BOARD_SENSORS \
  "ov8865_cm9462",\
  "gc2235_8916", \
  "ov5648_oty5f03",\

  "ov13850", 

上电过程小析

vendor/qcom/proprietary/mm-camera/mm-camera2/media-controller/modules/sensors/module/sensor_init.c

sensor_init_probe
{
	sensor_probe(sd_fd, sensor_libs[i]);
}

vendor/qcom/proprietary/mm-camera/mm-camera2/media-controller/modules/sensors/sensors/sensor.c

sensor_probe
{
	if (LOG_IOCTL(fd, VIDIOC_MSM_SENSOR_INIT_CFG, &cfg) < 0)
}

kernel/drivers/media/platform/msm/camera_v2/sensor/msm_sensor_init.c

case VIDIOC_MSM_SENSOR_INIT_CFG:
		 msm_sensor_driver_cmd(s_init, arg);
	
	msm_sensor_driver_probe
	{
		/* Power up and probe sensor */
		rc = s_ctrl->func_tbl->sensor_power_up(s_ctrl);
	}

	int msm_sensor_power_up(struct msm_sensor_ctrl_t *s_ctrl)
	{
		for (retry = 0; retry < 3; retry++) {
			rc = msm_camera_power_up(power_info, s_ctrl->sensor_device_type,sensor_i2c_client);
			if (rc < 0)
				return rc;
			rc = msm_sensor_check_id(s_ctrl);
			if (rc < 0) {
				msm_camera_power_down(power_info,s_ctrl->sensor_device_type, sensor_i2c_client);
				msleep(20);
				continue;
			} else {
				break;
			}
	}


	int msm_sensor_check_id(struct msm_sensor_ctrl_t *s_ctrl)
	{
		int rc;

		if (s_ctrl->func_tbl->sensor_match_id)
			rc = s_ctrl->func_tbl->sensor_match_id(s_ctrl);
		else
			rc = msm_sensor_match_id(s_ctrl);
		if (rc < 0)
			pr_err("%s:%d match id failed rc %d\n", __func__, __LINE__, rc);
		return rc;
	}

dts配置

qcom,camera@1 {
                cell-index = <1>; //1前摄
                compatible = "qcom,camera";
                reg = <0x1>;
                qcom,csiphy-sd-index = <1>;
                qcom,csid-sd-index = <1>;
                qcom,mount-angle = <90>;
                qcom,eeprom-src = <&eeprom1>;

                cam_vdig-supply = <&pm8916_l2>;
                cam_vana-supply = <&pm8916_l17>;
                cam_vio-supply = <&pm8916_l6>;
                qcom,cam-vreg-name = "cam_vdig", "cam_vio", "cam_vana";
                qcom,cam-vreg-min-voltage = <1200000 0 2850000>;
                qcom,cam-vreg-max-voltage = <1200000 0 2850000>;
                qcom,cam-vreg-op-mode = <200000 0 80000>;
		//这里用了3个ldo,分别对应相应的最小最大电源,vio这里为0,跟这路ldo被其它器件使用并使能有关		

                pinctrl-names = "cam_default", "cam_suspend";
                pinctrl-0 = <&cam_sensor_mclk1_default &cam_sensor_front_default>;
                pinctrl-1 = <&cam_sensor_mclk1_sleep &cam_sensor_front_sleep>;

                gpios = <&msm_gpio 27 0>,
                        <&msm_gpio 28 0>,
                        <&msm_gpio 33 0>;
                qcom,gpio-reset = <1>;
                qcom,gpio-standby = <2>;
                qcom,gpio-req-tbl-num = <0 1 2>;
                qcom,gpio-req-tbl-flags = <1 0 0>;
                qcom,gpio-req-tbl-label = "CAMIF_MCLK1",
                        "SCAM_RESET",
                        "SCAM_STANDBY";
		// gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
		//申请gpio用到这个函数,flags 1代表输入,0代表输出

                qcom,sensor-position = <1>;
                qcom,sensor-mode = <0>;
                qcom,cci-master = <0>;
                status = "ok";
                clocks = <&clock_gcc clk_mclk1_clk_src>,
                                <&clock_gcc clk_gcc_camss_mclk1_clk>;
                clock-names = "cam_src_clk", "cam_clk";
        };
vendor/qcom/proprietary/mm-camera/mm-camera2/media-controller/modules/sensors/sensor_libs/ov8865_cm9462/ov8865_cm9462_lib.c

上电数组,如

static struct msm_sensor_power_setting power_setting[] = {
  {
    .seq_type = SENSOR_VREG,
    .seq_val = CAM_VIO,
    .config_val = 1,
    .delay = 1,
  },
  {
    .seq_type = SENSOR_VREG,
    .seq_val = CAM_VANA,
    .config_val = 1,
    .delay = 1,
  },
  {
    .seq_type = SENSOR_GPIO,
    .seq_val = SENSOR_GPIO_VDIG,
    .config_val = 1,
    .delay = 1,
  },
  {
    .seq_type = SENSOR_VREG,
    .seq_val = CAM_VAF,
    .config_val = 1,
    .delay = 5,
  },
  {
    .seq_type = SENSOR_GPIO,
    .seq_val = SENSOR_GPIO_STANDBY,
    .config_val = GPIO_OUT_LOW,
    .delay = 1,
  },
  {
    .seq_type = SENSOR_GPIO,
    .seq_val = SENSOR_GPIO_RESET,
    .config_val = GPIO_OUT_LOW,
    .delay = 5,
  },
  {
    .seq_type = SENSOR_GPIO,
    .seq_val = SENSOR_GPIO_AF_PWDM,
    .config_val = GPIO_OUT_LOW,
    .delay = 5,
  },
  {
    .seq_type = SENSOR_GPIO,
    .seq_val = SENSOR_GPIO_STANDBY,
    .config_val = GPIO_OUT_HIGH,
    .delay = 5,
  },
  {
    .seq_type = SENSOR_GPIO,
    .seq_val = SENSOR_GPIO_RESET,
    .config_val = GPIO_OUT_HIGH,
    .delay = 10,
  },
  {
    .seq_type = SENSOR_GPIO,
    .seq_val = SENSOR_GPIO_AF_PWDM,
    .config_val = GPIO_OUT_HIGH,
    .delay = 5,
  },
  {
    .seq_type = SENSOR_CLK,
    .seq_val = SENSOR_CAM_MCLK,
    .config_val = 23880000,
    .delay = 10,
  },
  {
    .seq_type = SENSOR_I2C_MUX,
    .seq_val = 0,
    .config_val = 0,
    .delay = 10,
  },
};

type就是类型,主要有电源,io脚,时钟,i2c,这个数组解析下来就类似于
使能CAM_VIO
拉高某某io脚
配置时钟

相关的打印如下

[   18.582925] camera id 0
[   18.584333] slave_addr 0x6c
[   18.587109] addr_type 2
[   18.589604] sensor_id_reg_addr 0x300b
[   18.593190] sensor_id 0x8865
[   18.596054] size 12
[   18.598137] size down 7
[   18.600654] position 0
[   18.602764] mount 0s_ctrl[0] ffffffc06fa45000
[   18.607094] UP seq_type 2 seq_val 1 config_val 1 delay 1
[   18.612630] UP seq_type 2 seq_val 2 config_val 1 delay 1
[   18.617869] UP seq_type 1 seq_val 5 config_val 1 delay 1
[   18.623218] UP seq_type 2 seq_val 3 config_val 1 delay 5
[   18.628487] UP seq_type 1 seq_val 1 config_val 0 delay 1
[   18.633756] UP seq_type 1 seq_val 0 config_val 0 delay 5
[   18.639092] UP seq_type 1 seq_val 2 config_val 0 delay 5
[   18.644348] UP seq_type 1 seq_val 1 config_val 2 delay 5
[   18.649677] UP seq_type 1 seq_val 0 config_val 2 delay 10
[   18.655025] UP seq_type 1 seq_val 2 config_val 2 delay 5
[   18.660352] UP seq_type 0 seq_val 0 config_val 23880000 delay 10
[   18.666317] UP seq_type 3 seq_val 0 config_val 0 delay 10
[   18.671747] DOWN seq_type 1 seq_val 0 config_val 0 delay 1
[   18.677165] DOWN seq_type 1 seq_val 1 config_val 0 delay 1
[   18.682693] DOWN seq_type 0 seq_val 0 config_val 0 delay 1
[   18.688095] DOWN seq_type 1 seq_val 2 config_val 0 delay 5
[   18.693630] DOWN seq_type 2 seq_val 1 config_val 0 delay 1
[   18.699069] DOWN seq_type 2 seq_val 3 config_val 0 delay 1
[   18.704498] DOWN seq_type 1 seq_val 5 config_val 0 delay 1
[   18.710041] msm_camera_fill_vreg_params:65 i 0 j 0 cam_vio
[   18.715437] msm_camera_fill_vreg_params:76 i 1 j 1 cam_vana
[   18.721026] msm_camera_fill_vreg_params:87 i 3 j 2 cam_vaf
[   18.726488] msm_camera_fill_vreg_params:65 i 4 j 0 cam_vio
[   18.732033] msm_camera_fill_vreg_params:87 i 5 j 2 cam_vaf
[   18.738258] msm_sensor_fill_actuator_subdevid_by_name qcom,actuator cell index 0, rc 0
[   18.745304] msm_camera_power_up:1225
[   18.749586] msm_camera_power_up index 0
[   18.752695] msm_camera_power_up type 2
[   18.758214] msm_camera_power_up index 1
[   18.761032] msm_camera_power_up type 2
[   18.767152] msm_camera_power_up index 2
[   18.770113] msm_camera_power_up type 1
[   18.773678] msm_camera_power_up:1298 gpio set val 1016
[   18.780882] msm_camera_power_up index 3
[   18.784417] msm_camera_power_up type 2
[   18.794168] msm_camera_power_up index 4
[   18.796986] msm_camera_power_up type 1
[   18.800734] msm_camera_power_up:1298 gpio set val 936
[   18.807780] msm_camera_power_up index 5
[   18.810704] msm_camera_power_up type 1
[   18.814344] msm_camera_power_up:1298 gpio set val 937
[   18.825443] msm_camera_power_up index 6
[   18.828301] msm_camera_power_up type 1
[   18.832019] msm_camera_power_up:1298 gpio set val 1022
[   18.843166] msm_camera_power_up index 7
[   18.845963] msm_camera_power_up type 1
[   18.851722] msm_camera_power_up:1298 gpio set val 936
[   18.862352] msm_camera_power_up index 8
[   18.865148] msm_camera_power_up type 1
[   18.868955] msm_camera_power_up:1298 gpio set val 937
[   18.884950] msm_camera_power_up index 9
[   18.887746] msm_camera_power_up type 1
[   18.891519] msm_camera_power_up:1298 gpio set val 1022
[   18.902627] msm_camera_power_up index 10
[   18.905508] msm_camera_power_up type 0
[   18.921298] msm_camera_power_up index 11
[   18.924181] msm_camera_power_up type 3
[   18.939410]  msm_cci_init: Failed in getting TOP gdscr regulator handle
[   18.945060] msm_cci_init:763: hw_version = 0x10020000
[   18.946920] msm_camera_power_up exit
[   18.950111] msm_sensor_match_id: read id: 0x8865 expected id 0x8865:
[   18.955818] ov8865_cm9462 probe succeeded
[   18.959685] slave_info->is_flash_supported=1.
[   18.964138] s_ctrl->sensordata->sensor_info->subdev_id[SUB_MODULE_LED_FLASH=0.
[   18.974205] rc 0 session_id 1
[   18.977189] msm_camera_power_down:1444
[   18.980240] msm_camera_power_down index 0
[   18.984099] msm_camera_power_down type 1
[   18.989995] msm_camera_power_down index 1
[   18.992969] msm_camera_power_down type 1
[   18.998287] msm_camera_power_down index 2
[   19.001261] msm_camera_power_down type 0
[   19.007239] msm_camera_power_down index 3
[   19.010246] msm_camera_power_down type 1
[   19.020164] msm_camera_power_down index 4
[   19.023133] msm_camera_power_down type 2
[   19.028269] msm_camera_power_down index 5
[   19.031299] msm_camera_power_down type 2
[   19.038117] msm_camera_power_down index 6
[   19.041161] msm_camera_power_down type 1
[   19.047179] msm_camera_power_down exit

UP seq_type 2 seq_val 1 config_val 1 delay 1

从这些打印看,都是在执行power_setting的上电顺序

type种类

enum msm_sensor_power_seq_type_t {
	SENSOR_CLK,
	SENSOR_GPIO,
	SENSOR_VREG,
	SENSOR_I2C_MUX,
	SENSOR_I2C,
};

type1(SENSOR_GPIO),相应的值

enum msm_sensor_power_seq_gpio_t {
	SENSOR_GPIO_RESET,
	SENSOR_GPIO_STANDBY,
	SENSOR_GPIO_AF_PWDM,
	SENSOR_GPIO_VIO,
	SENSOR_GPIO_VANA,
	SENSOR_GPIO_VDIG,
	SENSOR_GPIO_VAF,
	SENSOR_GPIO_FL_EN,
	SENSOR_GPIO_FL_NOW,
	SENSOR_GPIO_FL_RESET,
	SENSOR_GPIO_CUSTOM1,
	SENSOR_GPIO_CUSTOM2,
	SENSOR_GPIO_MAX,
};

type2(SENSOR_VREG电源),相应的值

enum msm_camera_vreg_name_t {
	CAM_VDIG,
	CAM_VIO,
	CAM_VANA,
	CAM_VAF,
	CAM_V_CUSTOM1,
	CAM_V_CUSTOM2,
	CAM_VREG_MAX,
};

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