// SPDX-License-Identifier: GPL-2.0-only /* * Sony imx335 Camera Sensor Driver * * Copyright (C) 2021 Intel Corporation */ #include #include #include #include #include #include #include #include #include /* Streaming Mode */ #define IMX335_REG_MODE_SELECT 0x3000 #define IMX335_MODE_STANDBY 0x01 #define IMX335_MODE_STREAMING 0x00 /* Lines per frame */ #define IMX335_REG_LPFR 0x3030 /* Chip ID */ #define IMX335_REG_ID 0x3912 #define IMX335_ID 0x00 /* Exposure control */ #define IMX335_REG_SHUTTER 0x3058 #define IMX335_EXPOSURE_MIN 1 #define IMX335_EXPOSURE_OFFSET 9 #define IMX335_EXPOSURE_STEP 1 #define IMX335_EXPOSURE_DEFAULT 0x0648 /* Analog gain control */ #define IMX335_REG_AGAIN 0x30e8 #define IMX335_AGAIN_MIN 0 #define IMX335_AGAIN_MAX 240 #define IMX335_AGAIN_STEP 1 #define IMX335_AGAIN_DEFAULT 0 /* Group hold register */ #define IMX335_REG_HOLD 0x3001 /* Input clock rate */ #define IMX335_INCLK_RATE 24000000 /* CSI2 HW configuration */ #define IMX335_LINK_FREQ 594000000 #define IMX335_NUM_DATA_LANES 4 #define IMX335_REG_MIN 0x00 #define IMX335_REG_MAX 0xfffff /** * struct imx335_reg - imx335 sensor register * @address: Register address * @val: Register value */ struct imx335_reg { u16 address; u8 val; }; /** * struct imx335_reg_list - imx335 sensor register list * @num_of_regs: Number of registers in the list * @regs: Pointer to register list */ struct imx335_reg_list { u32 num_of_regs; const struct imx335_reg *regs; }; static const char * const imx335_supply_name[] = { "avdd", /* Analog (2.9V) supply */ "ovdd", /* Digital I/O (1.8V) supply */ "dvdd", /* Digital Core (1.2V) supply */ }; /** * struct imx335_mode - imx335 sensor mode structure * @width: Frame width * @height: Frame height * @code: Format code * @hblank: Horizontal blanking in lines * @vblank: Vertical blanking in lines * @vblank_min: Minimum vertical blanking in lines * @vblank_max: Maximum vertical blanking in lines * @pclk: Sensor pixel clock * @link_freq_idx: Link frequency index * @reg_list: Register list for sensor mode */ struct imx335_mode { u32 width; u32 height; u32 code; u32 hblank; u32 vblank; u32 vblank_min; u32 vblank_max; u64 pclk; u32 link_freq_idx; struct imx335_reg_list reg_list; }; /** * struct imx335 - imx335 sensor device structure * @dev: Pointer to generic device * @client: Pointer to i2c client * @sd: V4L2 sub-device * @pad: Media pad. Only one pad supported * @reset_gpio: Sensor reset gpio * @supplies: Regulator supplies to handle power control * @inclk: Sensor input clock * @ctrl_handler: V4L2 control handler * @link_freq_ctrl: Pointer to link frequency control * @pclk_ctrl: Pointer to pixel clock 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 * @vblank: Vertical blanking in lines * @cur_mode: Pointer to current selected sensor mode * @mutex: Mutex for serializing sensor controls * @streaming: Flag indicating streaming state */ struct imx335 { struct device *dev; struct i2c_client *client; struct v4l2_subdev sd; struct media_pad pad; struct gpio_desc *reset_gpio; struct regulator_bulk_data supplies[ARRAY_SIZE(imx335_supply_name)]; struct clk *inclk; struct v4l2_ctrl_handler ctrl_handler; struct v4l2_ctrl *link_freq_ctrl; struct v4l2_ctrl *pclk_ctrl; struct v4l2_ctrl *hblank_ctrl; struct v4l2_ctrl *vblank_ctrl; struct { struct v4l2_ctrl *exp_ctrl; struct v4l2_ctrl *again_ctrl; }; u32 vblank; const struct imx335_mode *cur_mode; struct mutex mutex; bool streaming; }; static const s64 link_freq[] = { IMX335_LINK_FREQ, }; /* Sensor mode registers */ static const struct imx335_reg mode_2592x1940_regs[] = { {0x3000, 0x01}, {0x3002, 0x00}, {0x300c, 0x3b}, {0x300d, 0x2a}, {0x3018, 0x04}, {0x302c, 0x3c}, {0x302e, 0x20}, {0x3056, 0x94}, {0x3074, 0xc8}, {0x3076, 0x28}, {0x304c, 0x00}, {0x314c, 0xc6}, {0x315a, 0x02}, {0x3168, 0xa0}, {0x316a, 0x7e}, {0x31a1, 0x00}, {0x3288, 0x21}, {0x328a, 0x02}, {0x3414, 0x05}, {0x3416, 0x18}, {0x3648, 0x01}, {0x364a, 0x04}, {0x364c, 0x04}, {0x3678, 0x01}, {0x367c, 0x31}, {0x367e, 0x31}, {0x3706, 0x10}, {0x3708, 0x03}, {0x3714, 0x02}, {0x3715, 0x02}, {0x3716, 0x01}, {0x3717, 0x03}, {0x371c, 0x3d}, {0x371d, 0x3f}, {0x372c, 0x00}, {0x372d, 0x00}, {0x372e, 0x46}, {0x372f, 0x00}, {0x3730, 0x89}, {0x3731, 0x00}, {0x3732, 0x08}, {0x3733, 0x01}, {0x3734, 0xfe}, {0x3735, 0x05}, {0x3740, 0x02}, {0x375d, 0x00}, {0x375e, 0x00}, {0x375f, 0x11}, {0x3760, 0x01}, {0x3768, 0x1b}, {0x3769, 0x1b}, {0x376a, 0x1b}, {0x376b, 0x1b}, {0x376c, 0x1a}, {0x376d, 0x17}, {0x376e, 0x0f}, {0x3776, 0x00}, {0x3777, 0x00}, {0x3778, 0x46}, {0x3779, 0x00}, {0x377a, 0x89}, {0x377b, 0x00}, {0x377c, 0x08}, {0x377d, 0x01}, {0x377e, 0x23}, {0x377f, 0x02}, {0x3780, 0xd9}, {0x3781, 0x03}, {0x3782, 0xf5}, {0x3783, 0x06}, {0x3784, 0xa5}, {0x3788, 0x0f}, {0x378a, 0xd9}, {0x378b, 0x03}, {0x378c, 0xeb}, {0x378d, 0x05}, {0x378e, 0x87}, {0x378f, 0x06}, {0x3790, 0xf5}, {0x3792, 0x43}, {0x3794, 0x7a}, {0x3796, 0xa1}, {0x37b0, 0x36}, {0x3a00, 0x01}, }; /* Supported sensor mode configurations */ static const struct imx335_mode supported_mode = { .width = 2592, .height = 1940, .hblank = 342, .vblank = 2560, .vblank_min = 2560, .vblank_max = 133060, .pclk = 396000000, .link_freq_idx = 0, .code = MEDIA_BUS_FMT_SRGGB12_1X12, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_2592x1940_regs), .regs = mode_2592x1940_regs, }, }; /** * to_imx335() - imx335 V4L2 sub-device to imx335 device. * @subdev: pointer to imx335 V4L2 sub-device * * Return: pointer to imx335 device */ static inline struct imx335 *to_imx335(struct v4l2_subdev *subdev) { return container_of(subdev, struct imx335, sd); } /** * imx335_read_reg() - Read registers. * @imx335: pointer to imx335 device * @reg: register address * @len: length of bytes to read. Max supported bytes is 4 * @val: pointer to register value to be filled. * * Big endian register addresses with little endian values. * * Return: 0 if successful, error code otherwise. */ static int imx335_read_reg(struct imx335 *imx335, u16 reg, u32 len, u32 *val) { struct i2c_client *client = v4l2_get_subdevdata(&imx335->sd); struct i2c_msg msgs[2] = {0}; u8 addr_buf[2] = {0}; u8 data_buf[4] = {0}; int ret; if (WARN_ON(len > 4)) return -EINVAL; put_unaligned_be16(reg, addr_buf); /* Write register address */ msgs[0].addr = client->addr; msgs[0].flags = 0; msgs[0].len = ARRAY_SIZE(addr_buf); msgs[0].buf = addr_buf; /* Read data from register */ msgs[1].addr = client->addr; msgs[1].flags = I2C_M_RD; msgs[1].len = len; msgs[1].buf = data_buf; ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); if (ret != ARRAY_SIZE(msgs)) return -EIO; *val = get_unaligned_le32(data_buf); return 0; } /** * imx335_write_reg() - Write register * @imx335: pointer to imx335 device * @reg: register address * @len: length of bytes. Max supported bytes is 4 * @val: register value * * Big endian register addresses with little endian values. * * Return: 0 if successful, error code otherwise. */ static int imx335_write_reg(struct imx335 *imx335, u16 reg, u32 len, u32 val) { struct i2c_client *client = v4l2_get_subdevdata(&imx335->sd); u8 buf[6] = {0}; if (WARN_ON(len > 4)) return -EINVAL; put_unaligned_be16(reg, buf); put_unaligned_le32(val, buf + 2); if (i2c_master_send(client, buf, len + 2) != len + 2) return -EIO; return 0; } /** * imx335_write_regs() - Write a list of registers * @imx335: pointer to imx335 device * @regs: list of registers to be written * @len: length of registers array * * Return: 0 if successful. error code otherwise. */ static int imx335_write_regs(struct imx335 *imx335, const struct imx335_reg *regs, u32 len) { unsigned int i; int ret; for (i = 0; i < len; i++) { ret = imx335_write_reg(imx335, regs[i].address, 1, regs[i].val); if (ret) return ret; } return 0; } /** * imx335_update_controls() - Update control ranges based on streaming mode * @imx335: pointer to imx335 device * @mode: pointer to imx335_mode sensor mode * * Return: 0 if successful, error code otherwise. */ static int imx335_update_controls(struct imx335 *imx335, const struct imx335_mode *mode) { int ret; ret = __v4l2_ctrl_s_ctrl(imx335->link_freq_ctrl, mode->link_freq_idx); if (ret) return ret; ret = __v4l2_ctrl_s_ctrl(imx335->hblank_ctrl, mode->hblank); if (ret) return ret; return __v4l2_ctrl_modify_range(imx335->vblank_ctrl, mode->vblank_min, mode->vblank_max, 1, mode->vblank); } /** * imx335_update_exp_gain() - Set updated exposure and gain * @imx335: pointer to imx335 device * @exposure: updated exposure value * @gain: updated analog gain value * * Return: 0 if successful, error code otherwise. */ static int imx335_update_exp_gain(struct imx335 *imx335, u32 exposure, u32 gain) { u32 lpfr, shutter; int ret; lpfr = imx335->vblank + imx335->cur_mode->height; shutter = lpfr - exposure; dev_dbg(imx335->dev, "Set exp %u, analog gain %u, shutter %u, lpfr %u", exposure, gain, shutter, lpfr); ret = imx335_write_reg(imx335, IMX335_REG_HOLD, 1, 1); if (ret) return ret; ret = imx335_write_reg(imx335, IMX335_REG_LPFR, 3, lpfr); if (ret) goto error_release_group_hold; ret = imx335_write_reg(imx335, IMX335_REG_SHUTTER, 3, shutter); if (ret) goto error_release_group_hold; ret = imx335_write_reg(imx335, IMX335_REG_AGAIN, 2, gain); error_release_group_hold: imx335_write_reg(imx335, IMX335_REG_HOLD, 1, 0); return ret; } /** * imx335_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 imx335_set_ctrl(struct v4l2_ctrl *ctrl) { struct imx335 *imx335 = container_of(ctrl->handler, struct imx335, ctrl_handler); u32 analog_gain; u32 exposure; int ret; switch (ctrl->id) { case V4L2_CID_VBLANK: imx335->vblank = imx335->vblank_ctrl->val; dev_dbg(imx335->dev, "Received vblank %u, new lpfr %u", imx335->vblank, imx335->vblank + imx335->cur_mode->height); ret = __v4l2_ctrl_modify_range(imx335->exp_ctrl, IMX335_EXPOSURE_MIN, imx335->vblank + imx335->cur_mode->height - IMX335_EXPOSURE_OFFSET, 1, IMX335_EXPOSURE_DEFAULT); break; case V4L2_CID_EXPOSURE: /* Set controls only if sensor is in power on state */ if (!pm_runtime_get_if_in_use(imx335->dev)) return 0; exposure = ctrl->val; analog_gain = imx335->again_ctrl->val; dev_dbg(imx335->dev, "Received exp %u, analog gain %u", exposure, analog_gain); ret = imx335_update_exp_gain(imx335, exposure, analog_gain); pm_runtime_put(imx335->dev); break; default: dev_err(imx335->dev, "Invalid control %d", ctrl->id); ret = -EINVAL; } return ret; } /* V4l2 subdevice control ops*/ static const struct v4l2_ctrl_ops imx335_ctrl_ops = { .s_ctrl = imx335_set_ctrl, }; /** * imx335_enum_mbus_code() - Enumerate V4L2 sub-device mbus codes * @sd: pointer to imx335 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 imx335_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { if (code->index > 0) return -EINVAL; code->code = supported_mode.code; return 0; } /** * imx335_enum_frame_size() - Enumerate V4L2 sub-device frame sizes * @sd: pointer to imx335 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 imx335_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_frame_size_enum *fsize) { if (fsize->index > 0) return -EINVAL; if (fsize->code != supported_mode.code) return -EINVAL; fsize->min_width = supported_mode.width; fsize->max_width = fsize->min_width; fsize->min_height = supported_mode.height; fsize->max_height = fsize->min_height; return 0; } /** * imx335_fill_pad_format() - Fill subdevice pad format * from selected sensor mode * @imx335: pointer to imx335 device * @mode: pointer to imx335_mode sensor mode * @fmt: V4L2 sub-device format need to be filled */ static void imx335_fill_pad_format(struct imx335 *imx335, const struct imx335_mode *mode, struct v4l2_subdev_format *fmt) { fmt->format.width = mode->width; fmt->format.height = mode->height; fmt->format.code = mode->code; fmt->format.field = V4L2_FIELD_NONE; fmt->format.colorspace = V4L2_COLORSPACE_RAW; fmt->format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; fmt->format.quantization = V4L2_QUANTIZATION_DEFAULT; fmt->format.xfer_func = V4L2_XFER_FUNC_NONE; } /** * imx335_get_pad_format() - Get subdevice pad format * @sd: pointer to imx335 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 imx335_get_pad_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { struct imx335 *imx335 = to_imx335(sd); mutex_lock(&imx335->mutex); if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { struct v4l2_mbus_framefmt *framefmt; framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad); fmt->format = *framefmt; } else { imx335_fill_pad_format(imx335, imx335->cur_mode, fmt); } mutex_unlock(&imx335->mutex); return 0; } /** * imx335_set_pad_format() - Set subdevice pad format * @sd: pointer to imx335 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 imx335_set_pad_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { struct imx335 *imx335 = to_imx335(sd); const struct imx335_mode *mode; int ret = 0; mutex_lock(&imx335->mutex); mode = &supported_mode; imx335_fill_pad_format(imx335, mode, fmt); if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { struct v4l2_mbus_framefmt *framefmt; framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad); *framefmt = fmt->format; } else { ret = imx335_update_controls(imx335, mode); if (!ret) imx335->cur_mode = mode; } mutex_unlock(&imx335->mutex); return ret; } /** * imx335_init_pad_cfg() - Initialize sub-device pad configuration * @sd: pointer to imx335 V4L2 sub-device structure * @sd_state: V4L2 sub-device configuration * * Return: 0 if successful, error code otherwise. */ static int imx335_init_pad_cfg(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state) { struct imx335 *imx335 = to_imx335(sd); struct v4l2_subdev_format fmt = { 0 }; fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; imx335_fill_pad_format(imx335, &supported_mode, &fmt); return imx335_set_pad_format(sd, sd_state, &fmt); } /** * imx335_start_streaming() - Start sensor stream * @imx335: pointer to imx335 device * * Return: 0 if successful, error code otherwise. */ static int imx335_start_streaming(struct imx335 *imx335) { const struct imx335_reg_list *reg_list; int ret; /* Write sensor mode registers */ reg_list = &imx335->cur_mode->reg_list; ret = imx335_write_regs(imx335, reg_list->regs, reg_list->num_of_regs); if (ret) { dev_err(imx335->dev, "fail to write initial registers"); return ret; } /* Setup handler will write actual exposure and gain */ ret = __v4l2_ctrl_handler_setup(imx335->sd.ctrl_handler); if (ret) { dev_err(imx335->dev, "fail to setup handler"); return ret; } /* Start streaming */ ret = imx335_write_reg(imx335, IMX335_REG_MODE_SELECT, 1, IMX335_MODE_STREAMING); if (ret) { dev_err(imx335->dev, "fail to start streaming"); return ret; } /* Initial regulator stabilization period */ usleep_range(18000, 20000); return 0; } /** * imx335_stop_streaming() - Stop sensor stream * @imx335: pointer to imx335 device * * Return: 0 if successful, error code otherwise. */ static int imx335_stop_streaming(struct imx335 *imx335) { return imx335_write_reg(imx335, IMX335_REG_MODE_SELECT, 1, IMX335_MODE_STANDBY); } /** * imx335_set_stream() - Enable sensor streaming * @sd: pointer to imx335 subdevice * @enable: set to enable sensor streaming * * Return: 0 if successful, error code otherwise. */ static int imx335_set_stream(struct v4l2_subdev *sd, int enable) { struct imx335 *imx335 = to_imx335(sd); int ret; mutex_lock(&imx335->mutex); if (imx335->streaming == enable) { mutex_unlock(&imx335->mutex); return 0; } if (enable) { ret = pm_runtime_resume_and_get(imx335->dev); if (ret) goto error_unlock; ret = imx335_start_streaming(imx335); if (ret) goto error_power_off; } else { imx335_stop_streaming(imx335); pm_runtime_put(imx335->dev); } imx335->streaming = enable; mutex_unlock(&imx335->mutex); return 0; error_power_off: pm_runtime_put(imx335->dev); error_unlock: mutex_unlock(&imx335->mutex); return ret; } /** * imx335_detect() - Detect imx335 sensor * @imx335: pointer to imx335 device * * Return: 0 if successful, -EIO if sensor id does not match */ static int imx335_detect(struct imx335 *imx335) { int ret; u32 val; ret = imx335_read_reg(imx335, IMX335_REG_ID, 2, &val); if (ret) return ret; if (val != IMX335_ID) { dev_err(imx335->dev, "chip id mismatch: %x!=%x", IMX335_ID, val); return -ENXIO; } return 0; } /** * imx335_parse_hw_config() - Parse HW configuration and check if supported * @imx335: pointer to imx335 device * * Return: 0 if successful, error code otherwise. */ static int imx335_parse_hw_config(struct imx335 *imx335) { struct fwnode_handle *fwnode = dev_fwnode(imx335->dev); struct v4l2_fwnode_endpoint bus_cfg = { .bus_type = V4L2_MBUS_CSI2_DPHY }; struct fwnode_handle *ep; unsigned long rate; unsigned int i; int ret; if (!fwnode) return -ENXIO; /* Request optional reset pin */ imx335->reset_gpio = devm_gpiod_get_optional(imx335->dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(imx335->reset_gpio)) { dev_err(imx335->dev, "failed to get reset gpio %ld", PTR_ERR(imx335->reset_gpio)); return PTR_ERR(imx335->reset_gpio); } for (i = 0; i < ARRAY_SIZE(imx335_supply_name); i++) imx335->supplies[i].supply = imx335_supply_name[i]; ret = devm_regulator_bulk_get(imx335->dev, ARRAY_SIZE(imx335_supply_name), imx335->supplies); if (ret) { dev_err(imx335->dev, "Failed to get regulators\n"); return ret; } /* Get sensor input clock */ imx335->inclk = devm_clk_get(imx335->dev, NULL); if (IS_ERR(imx335->inclk)) { dev_err(imx335->dev, "could not get inclk"); return PTR_ERR(imx335->inclk); } rate = clk_get_rate(imx335->inclk); if (rate != IMX335_INCLK_RATE) { dev_err(imx335->dev, "inclk frequency mismatch"); return -EINVAL; } ep = fwnode_graph_get_next_endpoint(fwnode, NULL); if (!ep) return -ENXIO; ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); fwnode_handle_put(ep); if (ret) return ret; if (bus_cfg.bus.mipi_csi2.num_data_lanes != IMX335_NUM_DATA_LANES) { dev_err(imx335->dev, "number of CSI2 data lanes %d is not supported", bus_cfg.bus.mipi_csi2.num_data_lanes); ret = -EINVAL; goto done_endpoint_free; } if (!bus_cfg.nr_of_link_frequencies) { dev_err(imx335->dev, "no link frequencies defined"); ret = -EINVAL; goto done_endpoint_free; } for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) if (bus_cfg.link_frequencies[i] == IMX335_LINK_FREQ) goto done_endpoint_free; ret = -EINVAL; done_endpoint_free: v4l2_fwnode_endpoint_free(&bus_cfg); return ret; } /* V4l2 subdevice ops */ static const struct v4l2_subdev_video_ops imx335_video_ops = { .s_stream = imx335_set_stream, }; static const struct v4l2_subdev_pad_ops imx335_pad_ops = { .init_cfg = imx335_init_pad_cfg, .enum_mbus_code = imx335_enum_mbus_code, .enum_frame_size = imx335_enum_frame_size, .get_fmt = imx335_get_pad_format, .set_fmt = imx335_set_pad_format, }; static const struct v4l2_subdev_ops imx335_subdev_ops = { .video = &imx335_video_ops, .pad = &imx335_pad_ops, }; /** * imx335_power_on() - Sensor power on sequence * @dev: pointer to i2c device * * Return: 0 if successful, error code otherwise. */ static int imx335_power_on(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct imx335 *imx335 = to_imx335(sd); int ret; ret = regulator_bulk_enable(ARRAY_SIZE(imx335_supply_name), imx335->supplies); if (ret) { dev_err(dev, "%s: failed to enable regulators\n", __func__); return ret; } usleep_range(500, 550); /* Tlow */ gpiod_set_value_cansleep(imx335->reset_gpio, 0); ret = clk_prepare_enable(imx335->inclk); if (ret) { dev_err(imx335->dev, "fail to enable inclk"); goto error_reset; } usleep_range(20, 22); /* T4 */ return 0; error_reset: gpiod_set_value_cansleep(imx335->reset_gpio, 1); regulator_bulk_disable(ARRAY_SIZE(imx335_supply_name), imx335->supplies); return ret; } /** * imx335_power_off() - Sensor power off sequence * @dev: pointer to i2c device * * Return: 0 if successful, error code otherwise. */ static int imx335_power_off(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct imx335 *imx335 = to_imx335(sd); gpiod_set_value_cansleep(imx335->reset_gpio, 1); clk_disable_unprepare(imx335->inclk); regulator_bulk_disable(ARRAY_SIZE(imx335_supply_name), imx335->supplies); return 0; } /** * imx335_init_controls() - Initialize sensor subdevice controls * @imx335: pointer to imx335 device * * Return: 0 if successful, error code otherwise. */ static int imx335_init_controls(struct imx335 *imx335) { struct v4l2_ctrl_handler *ctrl_hdlr = &imx335->ctrl_handler; const struct imx335_mode *mode = imx335->cur_mode; u32 lpfr; int ret; ret = v4l2_ctrl_handler_init(ctrl_hdlr, 6); if (ret) return ret; /* Serialize controls with sensor device */ ctrl_hdlr->lock = &imx335->mutex; /* Initialize exposure and gain */ lpfr = mode->vblank + mode->height; imx335->exp_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &imx335_ctrl_ops, V4L2_CID_EXPOSURE, IMX335_EXPOSURE_MIN, lpfr - IMX335_EXPOSURE_OFFSET, IMX335_EXPOSURE_STEP, IMX335_EXPOSURE_DEFAULT); imx335->again_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &imx335_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, IMX335_AGAIN_MIN, IMX335_AGAIN_MAX, IMX335_AGAIN_STEP, IMX335_AGAIN_DEFAULT); v4l2_ctrl_cluster(2, &imx335->exp_ctrl); imx335->vblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &imx335_ctrl_ops, V4L2_CID_VBLANK, mode->vblank_min, mode->vblank_max, 1, mode->vblank); /* Read only controls */ imx335->pclk_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &imx335_ctrl_ops, V4L2_CID_PIXEL_RATE, mode->pclk, mode->pclk, 1, mode->pclk); imx335->link_freq_ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr, &imx335_ctrl_ops, V4L2_CID_LINK_FREQ, ARRAY_SIZE(link_freq) - 1, mode->link_freq_idx, link_freq); if (imx335->link_freq_ctrl) imx335->link_freq_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; imx335->hblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &imx335_ctrl_ops, V4L2_CID_HBLANK, mode->hblank, mode->hblank, 1, mode->hblank); if (imx335->hblank_ctrl) imx335->hblank_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; if (ctrl_hdlr->error) { dev_err(imx335->dev, "control init failed: %d", ctrl_hdlr->error); v4l2_ctrl_handler_free(ctrl_hdlr); return ctrl_hdlr->error; } imx335->sd.ctrl_handler = ctrl_hdlr; return 0; } /** * imx335_probe() - I2C client device binding * @client: pointer to i2c client device * * Return: 0 if successful, error code otherwise. */ static int imx335_probe(struct i2c_client *client) { struct imx335 *imx335; int ret; imx335 = devm_kzalloc(&client->dev, sizeof(*imx335), GFP_KERNEL); if (!imx335) return -ENOMEM; imx335->dev = &client->dev; /* Initialize subdev */ v4l2_i2c_subdev_init(&imx335->sd, client, &imx335_subdev_ops); ret = imx335_parse_hw_config(imx335); if (ret) { dev_err(imx335->dev, "HW configuration is not supported"); return ret; } mutex_init(&imx335->mutex); ret = imx335_power_on(imx335->dev); if (ret) { dev_err(imx335->dev, "failed to power-on the sensor"); goto error_mutex_destroy; } /* Check module identity */ ret = imx335_detect(imx335); if (ret) { dev_err(imx335->dev, "failed to find sensor: %d", ret); goto error_power_off; } /* Set default mode to max resolution */ imx335->cur_mode = &supported_mode; imx335->vblank = imx335->cur_mode->vblank; ret = imx335_init_controls(imx335); if (ret) { dev_err(imx335->dev, "failed to init controls: %d", ret); goto error_power_off; } /* Initialize subdev */ imx335->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; imx335->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; /* Initialize source pad */ imx335->pad.flags = MEDIA_PAD_FL_SOURCE; ret = media_entity_pads_init(&imx335->sd.entity, 1, &imx335->pad); if (ret) { dev_err(imx335->dev, "failed to init entity pads: %d", ret); goto error_handler_free; } ret = v4l2_async_register_subdev_sensor(&imx335->sd); if (ret < 0) { dev_err(imx335->dev, "failed to register async subdev: %d", ret); goto error_media_entity; } pm_runtime_set_active(imx335->dev); pm_runtime_enable(imx335->dev); pm_runtime_idle(imx335->dev); return 0; error_media_entity: media_entity_cleanup(&imx335->sd.entity); error_handler_free: v4l2_ctrl_handler_free(imx335->sd.ctrl_handler); error_power_off: imx335_power_off(imx335->dev); error_mutex_destroy: mutex_destroy(&imx335->mutex); return ret; } /** * imx335_remove() - I2C client device unbinding * @client: pointer to I2C client device * * Return: 0 if successful, error code otherwise. */ static void imx335_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct imx335 *imx335 = to_imx335(sd); v4l2_async_unregister_subdev(sd); media_entity_cleanup(&sd->entity); v4l2_ctrl_handler_free(sd->ctrl_handler); pm_runtime_disable(&client->dev); if (!pm_runtime_status_suspended(&client->dev)) imx335_power_off(&client->dev); pm_runtime_set_suspended(&client->dev); mutex_destroy(&imx335->mutex); } static const struct dev_pm_ops imx335_pm_ops = { SET_RUNTIME_PM_OPS(imx335_power_off, imx335_power_on, NULL) }; static const struct of_device_id imx335_of_match[] = { { .compatible = "sony,imx335" }, { } }; MODULE_DEVICE_TABLE(of, imx335_of_match); static struct i2c_driver imx335_driver = { .probe = imx335_probe, .remove = imx335_remove, .driver = { .name = "imx335", .pm = &imx335_pm_ops, .of_match_table = imx335_of_match, }, }; module_i2c_driver(imx335_driver); MODULE_DESCRIPTION("Sony imx335 sensor driver"); MODULE_LICENSE("GPL");