// SPDX-License-Identifier: GPL-2.0-only /* * OmniVision ov9282 Camera Sensor Driver * * Copyright (C) 2021 Intel Corporation */ #include <asm/unaligned.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/pm_runtime.h> #include <linux/regulator/consumer.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-event.h> #include <media/v4l2-fwnode.h> #include <media/v4l2-subdev.h> /* Streaming Mode */ #define OV9282_REG_MODE_SELECT … #define OV9282_MODE_STANDBY … #define OV9282_MODE_STREAMING … #define OV9282_REG_PLL_CTRL_0D … #define OV9282_PLL_CTRL_0D_RAW8 … #define OV9282_PLL_CTRL_0D_RAW10 … #define OV9282_REG_TIMING_HTS … #define OV9282_TIMING_HTS_MAX … /* Lines per frame */ #define OV9282_REG_LPFR … /* Chip ID */ #define OV9282_REG_ID … #define OV9282_ID … /* Exposure control */ #define OV9282_REG_EXPOSURE … #define OV9282_EXPOSURE_MIN … #define OV9282_EXPOSURE_OFFSET … #define OV9282_EXPOSURE_STEP … #define OV9282_EXPOSURE_DEFAULT … /* Analog gain control */ #define OV9282_REG_AGAIN … #define OV9282_AGAIN_MIN … #define OV9282_AGAIN_MAX … #define OV9282_AGAIN_STEP … #define OV9282_AGAIN_DEFAULT … /* Group hold register */ #define OV9282_REG_HOLD … #define OV9282_REG_ANA_CORE_2 … #define OV9282_ANA_CORE2_RAW8 … #define OV9282_ANA_CORE2_RAW10 … #define OV9282_REG_TIMING_FORMAT_1 … #define OV9282_REG_TIMING_FORMAT_2 … #define OV9282_FLIP_BIT … #define OV9282_REG_MIPI_CTRL00 … #define OV9282_GATED_CLOCK … /* Input clock rate */ #define OV9282_INCLK_RATE … /* CSI2 HW configuration */ #define OV9282_LINK_FREQ … #define OV9282_NUM_DATA_LANES … /* Pixel rate */ #define OV9282_PIXEL_RATE_10BIT … #define OV9282_PIXEL_RATE_8BIT … /* * OV9282 native and active pixel array size. * 8 dummy rows/columns on each edge of a 1280x800 active array */ #define OV9282_NATIVE_WIDTH … #define OV9282_NATIVE_HEIGHT … #define OV9282_PIXEL_ARRAY_LEFT … #define OV9282_PIXEL_ARRAY_TOP … #define OV9282_PIXEL_ARRAY_WIDTH … #define OV9282_PIXEL_ARRAY_HEIGHT … #define OV9282_REG_MIN … #define OV9282_REG_MAX … static const char * const ov9282_supply_names[] = …; #define OV9282_NUM_SUPPLIES … /** * struct ov9282_reg - ov9282 sensor register * @address: Register address * @val: Register value */ struct ov9282_reg { … }; /** * struct ov9282_reg_list - ov9282 sensor register list * @num_of_regs: Number of registers in the list * @regs: Pointer to register list */ struct ov9282_reg_list { … }; /** * struct ov9282_mode - ov9282 sensor mode structure * @width: Frame width * @height: Frame height * @hblank_min: Minimum horizontal blanking in lines for non-continuous[0] and * continuous[1] clock modes * @vblank: Vertical blanking in lines * @vblank_min: Minimum vertical blanking in lines * @vblank_max: Maximum vertical blanking in lines * @link_freq_idx: Link frequency index * @crop: on-sensor cropping for this mode * @reg_list: Register list for sensor mode */ struct ov9282_mode { … }; /** * struct ov9282 - ov9282 sensor device structure * @dev: Pointer to generic device * @sd: V4L2 sub-device * @pad: Media pad. Only one pad supported * @reset_gpio: Sensor reset gpio * @inclk: Sensor input clock * @supplies: Regulator supplies for the sensor * @ctrl_handler: V4L2 control handler * @link_freq_ctrl: Pointer to link frequency control * @hblank_ctrl: Pointer to horizontal blanking control * @vblank_ctrl: Pointer to vertical blanking control * @exp_ctrl: Pointer to exposure control * @again_ctrl: Pointer to analog gain control * @pixel_rate: Pointer to pixel rate control * @vblank: Vertical blanking in lines * @noncontinuous_clock: Selection of CSI2 noncontinuous clock mode * @cur_mode: Pointer to current selected sensor mode * @code: Mbus code currently selected * @mutex: Mutex for serializing sensor controls */ struct ov9282 { … }; static const s64 link_freq[] = …; /* * Common registers * * Note: Do NOT include a software reset (0x0103, 0x01) in any of these * register arrays as some settings are written as part of ov9282_power_on, * and the reset will clear them. */ static const struct ov9282_reg common_regs[] = …; static struct ov9282_reg_list common_regs_list = …; #define MODE_1280_800 … #define MODE_1280_720 … #define MODE_640_400 … #define DEFAULT_MODE … /* Sensor mode registers */ static const struct ov9282_reg mode_1280x800_regs[] = …; static const struct ov9282_reg mode_1280x720_regs[] = …; static const struct ov9282_reg mode_640x400_regs[] = …; /* Supported sensor mode configurations */ static const struct ov9282_mode supported_modes[] = …; /** * to_ov9282() - ov9282 V4L2 sub-device to ov9282 device. * @subdev: pointer to ov9282 V4L2 sub-device * * Return: pointer to ov9282 device */ static inline struct ov9282 *to_ov9282(struct v4l2_subdev *subdev) { … } /** * ov9282_read_reg() - Read registers. * @ov9282: pointer to ov9282 device * @reg: register address * @len: length of bytes to read. Max supported bytes is 4 * @val: pointer to register value to be filled. * * Return: 0 if successful, error code otherwise. */ static int ov9282_read_reg(struct ov9282 *ov9282, u16 reg, u32 len, u32 *val) { … } /** * ov9282_write_reg() - Write register * @ov9282: pointer to ov9282 device * @reg: register address * @len: length of bytes. Max supported bytes is 4 * @val: register value * * Return: 0 if successful, error code otherwise. */ static int ov9282_write_reg(struct ov9282 *ov9282, u16 reg, u32 len, u32 val) { … } /** * ov9282_write_regs() - Write a list of registers * @ov9282: pointer to ov9282 device * @regs: list of registers to be written * @len: length of registers array * * Return: 0 if successful, error code otherwise. */ static int ov9282_write_regs(struct ov9282 *ov9282, const struct ov9282_reg *regs, u32 len) { … } /** * ov9282_update_controls() - Update control ranges based on streaming mode * @ov9282: pointer to ov9282 device * @mode: pointer to ov9282_mode sensor mode * @fmt: pointer to the requested mode * * Return: 0 if successful, error code otherwise. */ static int ov9282_update_controls(struct ov9282 *ov9282, const struct ov9282_mode *mode, const struct v4l2_subdev_format *fmt) { … } /** * ov9282_update_exp_gain() - Set updated exposure and gain * @ov9282: pointer to ov9282 device * @exposure: updated exposure value * @gain: updated analog gain value * * Return: 0 if successful, error code otherwise. */ static int ov9282_update_exp_gain(struct ov9282 *ov9282, u32 exposure, u32 gain) { … } static int ov9282_set_ctrl_hflip(struct ov9282 *ov9282, int value) { … } static int ov9282_set_ctrl_vflip(struct ov9282 *ov9282, int value) { … } /** * ov9282_set_ctrl() - Set subdevice control * @ctrl: pointer to v4l2_ctrl structure * * Supported controls: * - V4L2_CID_VBLANK * - cluster controls: * - V4L2_CID_ANALOGUE_GAIN * - V4L2_CID_EXPOSURE * * Return: 0 if successful, error code otherwise. */ static int ov9282_set_ctrl(struct v4l2_ctrl *ctrl) { … } /* V4l2 subdevice control ops*/ static const struct v4l2_ctrl_ops ov9282_ctrl_ops = …; /** * ov9282_enum_mbus_code() - Enumerate V4L2 sub-device mbus codes * @sd: pointer to ov9282 V4L2 sub-device structure * @sd_state: V4L2 sub-device configuration * @code: V4L2 sub-device code enumeration need to be filled * * Return: 0 if successful, error code otherwise. */ static int ov9282_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { … } /** * ov9282_enum_frame_size() - Enumerate V4L2 sub-device frame sizes * @sd: pointer to ov9282 V4L2 sub-device structure * @sd_state: V4L2 sub-device configuration * @fsize: V4L2 sub-device size enumeration need to be filled * * Return: 0 if successful, error code otherwise. */ static int ov9282_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_frame_size_enum *fsize) { … } /** * ov9282_fill_pad_format() - Fill subdevice pad format * from selected sensor mode * @ov9282: pointer to ov9282 device * @mode: pointer to ov9282_mode sensor mode * @code: mbus code to be stored * @fmt: V4L2 sub-device format need to be filled */ static void ov9282_fill_pad_format(struct ov9282 *ov9282, const struct ov9282_mode *mode, u32 code, struct v4l2_subdev_format *fmt) { … } /** * ov9282_get_pad_format() - Get subdevice pad format * @sd: pointer to ov9282 V4L2 sub-device structure * @sd_state: V4L2 sub-device configuration * @fmt: V4L2 sub-device format need to be set * * Return: 0 if successful, error code otherwise. */ static int ov9282_get_pad_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { … } /** * ov9282_set_pad_format() - Set subdevice pad format * @sd: pointer to ov9282 V4L2 sub-device structure * @sd_state: V4L2 sub-device configuration * @fmt: V4L2 sub-device format need to be set * * Return: 0 if successful, error code otherwise. */ static int ov9282_set_pad_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { … } /** * ov9282_init_state() - Initialize sub-device state * @sd: pointer to ov9282 V4L2 sub-device structure * @sd_state: V4L2 sub-device configuration * * Return: 0 if successful, error code otherwise. */ static int ov9282_init_state(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state) { … } static const struct v4l2_rect * __ov9282_get_pad_crop(struct ov9282 *ov9282, struct v4l2_subdev_state *sd_state, unsigned int pad, enum v4l2_subdev_format_whence which) { … } static int ov9282_get_selection(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_selection *sel) { … } /** * ov9282_start_streaming() - Start sensor stream * @ov9282: pointer to ov9282 device * * Return: 0 if successful, error code otherwise. */ static int ov9282_start_streaming(struct ov9282 *ov9282) { … } /** * ov9282_stop_streaming() - Stop sensor stream * @ov9282: pointer to ov9282 device * * Return: 0 if successful, error code otherwise. */ static int ov9282_stop_streaming(struct ov9282 *ov9282) { … } /** * ov9282_set_stream() - Enable sensor streaming * @sd: pointer to ov9282 subdevice * @enable: set to enable sensor streaming * * Return: 0 if successful, error code otherwise. */ static int ov9282_set_stream(struct v4l2_subdev *sd, int enable) { … } /** * ov9282_detect() - Detect ov9282 sensor * @ov9282: pointer to ov9282 device * * Return: 0 if successful, -EIO if sensor id does not match */ static int ov9282_detect(struct ov9282 *ov9282) { … } static int ov9282_configure_regulators(struct ov9282 *ov9282) { … } /** * ov9282_parse_hw_config() - Parse HW configuration and check if supported * @ov9282: pointer to ov9282 device * * Return: 0 if successful, error code otherwise. */ static int ov9282_parse_hw_config(struct ov9282 *ov9282) { … } /* V4l2 subdevice ops */ static const struct v4l2_subdev_core_ops ov9282_core_ops = …; static const struct v4l2_subdev_video_ops ov9282_video_ops = …; static const struct v4l2_subdev_pad_ops ov9282_pad_ops = …; static const struct v4l2_subdev_ops ov9282_subdev_ops = …; static const struct v4l2_subdev_internal_ops ov9282_internal_ops = …; /** * ov9282_power_on() - Sensor power on sequence * @dev: pointer to i2c device * * Return: 0 if successful, error code otherwise. */ static int ov9282_power_on(struct device *dev) { … } /** * ov9282_power_off() - Sensor power off sequence * @dev: pointer to i2c device * * Return: 0 if successful, error code otherwise. */ static int ov9282_power_off(struct device *dev) { … } /** * ov9282_init_controls() - Initialize sensor subdevice controls * @ov9282: pointer to ov9282 device * * Return: 0 if successful, error code otherwise. */ static int ov9282_init_controls(struct ov9282 *ov9282) { … } /** * ov9282_probe() - I2C client device binding * @client: pointer to i2c client device * * Return: 0 if successful, error code otherwise. */ static int ov9282_probe(struct i2c_client *client) { … } /** * ov9282_remove() - I2C client device unbinding * @client: pointer to I2C client device * * Return: 0 if successful, error code otherwise. */ static void ov9282_remove(struct i2c_client *client) { … } static const struct dev_pm_ops ov9282_pm_ops = …; static const struct of_device_id ov9282_of_match[] = …; MODULE_DEVICE_TABLE(of, ov9282_of_match); static struct i2c_driver ov9282_driver = …; module_i2c_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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