// SPDX-License-Identifier: GPL-2.0-only /* * Sony imx412 Camera Sensor Driver * * Copyright (C) 2021 Intel Corporation */ #include #include #include #include #include #include #include #include #include #include /* Streaming Mode */ #define IMX412_REG_MODE_SELECT 0x0100 #define IMX412_MODE_STANDBY 0x00 #define IMX412_MODE_STREAMING 0x01 /* Lines per frame */ #define IMX412_REG_LPFR 0x0340 /* Chip ID */ #define IMX412_REG_ID 0x0016 #define IMX412_ID 0x577 /* Exposure control */ #define IMX412_REG_EXPOSURE_CIT 0x0202 #define IMX412_EXPOSURE_MIN 8 #define IMX412_EXPOSURE_OFFSET 22 #define IMX412_EXPOSURE_STEP 1 #define IMX412_EXPOSURE_DEFAULT 0x0648 /* Analog gain control */ #define IMX412_REG_AGAIN 0x0204 #define IMX412_AGAIN_MIN 0 #define IMX412_AGAIN_MAX 978 #define IMX412_AGAIN_STEP 1 #define IMX412_AGAIN_DEFAULT 0 /* Group hold register */ #define IMX412_REG_HOLD 0x0104 /* Input clock rate */ #define IMX412_INCLK_RATE 24000000 /* CSI2 HW configuration */ #define IMX412_LINK_FREQ 600000000 #define IMX412_NUM_DATA_LANES 4 #define IMX412_REG_MIN 0x00 #define IMX412_REG_MAX 0xffff /** * struct imx412_reg - imx412 sensor register * @address: Register address * @val: Register value */ struct imx412_reg { u16 address; u8 val; }; /** * struct imx412_reg_list - imx412 sensor register list * @num_of_regs: Number of registers in the list * @regs: Pointer to register list */ struct imx412_reg_list { u32 num_of_regs; const struct imx412_reg *regs; }; /** * struct imx412_mode - imx412 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 imx412_mode { u32 width; u32 height; u32 code; u32 hblank; u32 vblank; u32 vblank_min; u32 vblank_max; u64 pclk; u32 link_freq_idx; struct imx412_reg_list reg_list; }; static const char * const imx412_supply_names[] = { "dovdd", /* Digital I/O power */ "avdd", /* Analog power */ "dvdd", /* Digital core power */ }; /** * struct imx412 - imx412 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 * @inclk: Sensor input clock * @supplies: Regulator supplies * @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 */ struct imx412 { struct device *dev; struct i2c_client *client; struct v4l2_subdev sd; struct media_pad pad; struct gpio_desc *reset_gpio; struct clk *inclk; struct regulator_bulk_data supplies[ARRAY_SIZE(imx412_supply_names)]; 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 imx412_mode *cur_mode; struct mutex mutex; }; static const s64 link_freq[] = { IMX412_LINK_FREQ, }; /* Sensor mode registers */ static const struct imx412_reg mode_4056x3040_regs[] = { {0x0136, 0x18}, {0x0137, 0x00}, {0x3c7e, 0x08}, {0x3c7f, 0x02}, {0x38a8, 0x1f}, {0x38a9, 0xff}, {0x38aa, 0x1f}, {0x38ab, 0xff}, {0x55d4, 0x00}, {0x55d5, 0x00}, {0x55d6, 0x07}, {0x55d7, 0xff}, {0x55e8, 0x07}, {0x55e9, 0xff}, {0x55ea, 0x00}, {0x55eb, 0x00}, {0x575c, 0x07}, {0x575d, 0xff}, {0x575e, 0x00}, {0x575f, 0x00}, {0x5764, 0x00}, {0x5765, 0x00}, {0x5766, 0x07}, {0x5767, 0xff}, {0x5974, 0x04}, {0x5975, 0x01}, {0x5f10, 0x09}, {0x5f11, 0x92}, {0x5f12, 0x32}, {0x5f13, 0x72}, {0x5f14, 0x16}, {0x5f15, 0xba}, {0x5f17, 0x13}, {0x5f18, 0x24}, {0x5f19, 0x60}, {0x5f1a, 0xe3}, {0x5f1b, 0xad}, {0x5f1c, 0x74}, {0x5f2d, 0x25}, {0x5f5c, 0xd0}, {0x6a22, 0x00}, {0x6a23, 0x1d}, {0x7ba8, 0x00}, {0x7ba9, 0x00}, {0x886b, 0x00}, {0x9002, 0x0a}, {0x9004, 0x1a}, {0x9214, 0x93}, {0x9215, 0x69}, {0x9216, 0x93}, {0x9217, 0x6b}, {0x9218, 0x93}, {0x9219, 0x6d}, {0x921a, 0x57}, {0x921b, 0x58}, {0x921c, 0x57}, {0x921d, 0x59}, {0x921e, 0x57}, {0x921f, 0x5a}, {0x9220, 0x57}, {0x9221, 0x5b}, {0x9222, 0x93}, {0x9223, 0x02}, {0x9224, 0x93}, {0x9225, 0x03}, {0x9226, 0x93}, {0x9227, 0x04}, {0x9228, 0x93}, {0x9229, 0x05}, {0x922a, 0x98}, {0x922b, 0x21}, {0x922c, 0xb2}, {0x922d, 0xdb}, {0x922e, 0xb2}, {0x922f, 0xdc}, {0x9230, 0xb2}, {0x9231, 0xdd}, {0x9232, 0xe2}, {0x9233, 0xe1}, {0x9234, 0xb2}, {0x9235, 0xe2}, {0x9236, 0xb2}, {0x9237, 0xe3}, {0x9238, 0xb7}, {0x9239, 0xb9}, {0x923a, 0xb7}, {0x923b, 0xbb}, {0x923c, 0xb7}, {0x923d, 0xbc}, {0x923e, 0xb7}, {0x923f, 0xc5}, {0x9240, 0xb7}, {0x9241, 0xc7}, {0x9242, 0xb7}, {0x9243, 0xc9}, {0x9244, 0x98}, {0x9245, 0x56}, {0x9246, 0x98}, {0x9247, 0x55}, {0x9380, 0x00}, {0x9381, 0x62}, {0x9382, 0x00}, {0x9383, 0x56}, {0x9384, 0x00}, {0x9385, 0x52}, {0x9388, 0x00}, {0x9389, 0x55}, {0x938a, 0x00}, {0x938b, 0x55}, {0x938c, 0x00}, {0x938d, 0x41}, {0x5078, 0x01}, {0x0112, 0x0a}, {0x0113, 0x0a}, {0x0114, 0x03}, {0x0342, 0x11}, {0x0343, 0xa0}, {0x0340, 0x0d}, {0x0341, 0xda}, {0x3210, 0x00}, {0x0344, 0x00}, {0x0345, 0x00}, {0x0346, 0x00}, {0x0347, 0x00}, {0x0348, 0x0f}, {0x0349, 0xd7}, {0x034a, 0x0b}, {0x034b, 0xdf}, {0x00e3, 0x00}, {0x00e4, 0x00}, {0x00e5, 0x01}, {0x00fc, 0x0a}, {0x00fd, 0x0a}, {0x00fe, 0x0a}, {0x00ff, 0x0a}, {0xe013, 0x00}, {0x0220, 0x00}, {0x0221, 0x11}, {0x0381, 0x01}, {0x0383, 0x01}, {0x0385, 0x01}, {0x0387, 0x01}, {0x0900, 0x00}, {0x0901, 0x11}, {0x0902, 0x00}, {0x3140, 0x02}, {0x3241, 0x11}, {0x3250, 0x03}, {0x3e10, 0x00}, {0x3e11, 0x00}, {0x3f0d, 0x00}, {0x3f42, 0x00}, {0x3f43, 0x00}, {0x0401, 0x00}, {0x0404, 0x00}, {0x0405, 0x10}, {0x0408, 0x00}, {0x0409, 0x00}, {0x040a, 0x00}, {0x040b, 0x00}, {0x040c, 0x0f}, {0x040d, 0xd8}, {0x040e, 0x0b}, {0x040f, 0xe0}, {0x034c, 0x0f}, {0x034d, 0xd8}, {0x034e, 0x0b}, {0x034f, 0xe0}, {0x0301, 0x05}, {0x0303, 0x02}, {0x0305, 0x04}, {0x0306, 0x00}, {0x0307, 0xc8}, {0x0309, 0x0a}, {0x030b, 0x01}, {0x030d, 0x02}, {0x030e, 0x01}, {0x030f, 0x5e}, {0x0310, 0x00}, {0x0820, 0x12}, {0x0821, 0xc0}, {0x0822, 0x00}, {0x0823, 0x00}, {0x3e20, 0x01}, {0x3e37, 0x00}, {0x3f50, 0x00}, {0x3f56, 0x00}, {0x3f57, 0xe2}, {0x3c0a, 0x5a}, {0x3c0b, 0x55}, {0x3c0c, 0x28}, {0x3c0d, 0x07}, {0x3c0e, 0xff}, {0x3c0f, 0x00}, {0x3c10, 0x00}, {0x3c11, 0x02}, {0x3c12, 0x00}, {0x3c13, 0x03}, {0x3c14, 0x00}, {0x3c15, 0x00}, {0x3c16, 0x0c}, {0x3c17, 0x0c}, {0x3c18, 0x0c}, {0x3c19, 0x0a}, {0x3c1a, 0x0a}, {0x3c1b, 0x0a}, {0x3c1c, 0x00}, {0x3c1d, 0x00}, {0x3c1e, 0x00}, {0x3c1f, 0x00}, {0x3c20, 0x00}, {0x3c21, 0x00}, {0x3c22, 0x3f}, {0x3c23, 0x0a}, {0x3e35, 0x01}, {0x3f4a, 0x03}, {0x3f4b, 0xbf}, {0x3f26, 0x00}, {0x0202, 0x0d}, {0x0203, 0xc4}, {0x0204, 0x00}, {0x0205, 0x00}, {0x020e, 0x01}, {0x020f, 0x00}, {0x0210, 0x01}, {0x0211, 0x00}, {0x0212, 0x01}, {0x0213, 0x00}, {0x0214, 0x01}, {0x0215, 0x00}, {0xbcf1, 0x00}, }; /* Supported sensor mode configurations */ static const struct imx412_mode supported_mode = { .width = 4056, .height = 3040, .hblank = 456, .vblank = 506, .vblank_min = 506, .vblank_max = 32420, .pclk = 480000000, .link_freq_idx = 0, .code = MEDIA_BUS_FMT_SRGGB10_1X10, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_4056x3040_regs), .regs = mode_4056x3040_regs, }, }; /** * to_imx412() - imx412 V4L2 sub-device to imx412 device. * @subdev: pointer to imx412 V4L2 sub-device * * Return: pointer to imx412 device */ static inline struct imx412 *to_imx412(struct v4l2_subdev *subdev) { return container_of(subdev, struct imx412, sd); } /** * imx412_read_reg() - Read registers. * @imx412: pointer to imx412 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 imx412_read_reg(struct imx412 *imx412, u16 reg, u32 len, u32 *val) { struct i2c_client *client = v4l2_get_subdevdata(&imx412->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[4 - len]; ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); if (ret != ARRAY_SIZE(msgs)) return -EIO; *val = get_unaligned_be32(data_buf); return 0; } /** * imx412_write_reg() - Write register * @imx412: pointer to imx412 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 imx412_write_reg(struct imx412 *imx412, u16 reg, u32 len, u32 val) { struct i2c_client *client = v4l2_get_subdevdata(&imx412->sd); u8 buf[6] = {0}; if (WARN_ON(len > 4)) return -EINVAL; put_unaligned_be16(reg, buf); put_unaligned_be32(val << (8 * (4 - len)), buf + 2); if (i2c_master_send(client, buf, len + 2) != len + 2) return -EIO; return 0; } /** * imx412_write_regs() - Write a list of registers * @imx412: pointer to imx412 device * @regs: list of registers to be written * @len: length of registers array * * Return: 0 if successful, error code otherwise. */ static int imx412_write_regs(struct imx412 *imx412, const struct imx412_reg *regs, u32 len) { unsigned int i; int ret; for (i = 0; i < len; i++) { ret = imx412_write_reg(imx412, regs[i].address, 1, regs[i].val); if (ret) return ret; } return 0; } /** * imx412_update_controls() - Update control ranges based on streaming mode * @imx412: pointer to imx412 device * @mode: pointer to imx412_mode sensor mode * * Return: 0 if successful, error code otherwise. */ static int imx412_update_controls(struct imx412 *imx412, const struct imx412_mode *mode) { int ret; ret = __v4l2_ctrl_s_ctrl(imx412->link_freq_ctrl, mode->link_freq_idx); if (ret) return ret; ret = __v4l2_ctrl_s_ctrl(imx412->hblank_ctrl, mode->hblank); if (ret) return ret; return __v4l2_ctrl_modify_range(imx412->vblank_ctrl, mode->vblank_min, mode->vblank_max, 1, mode->vblank); } /** * imx412_update_exp_gain() - Set updated exposure and gain * @imx412: pointer to imx412 device * @exposure: updated exposure value * @gain: updated analog gain value * * Return: 0 if successful, error code otherwise. */ static int imx412_update_exp_gain(struct imx412 *imx412, u32 exposure, u32 gain) { u32 lpfr, shutter; int ret; lpfr = imx412->vblank + imx412->cur_mode->height; shutter = lpfr - exposure; dev_dbg(imx412->dev, "Set exp %u, analog gain %u, shutter %u, lpfr %u", exposure, gain, shutter, lpfr); ret = imx412_write_reg(imx412, IMX412_REG_HOLD, 1, 1); if (ret) return ret; ret = imx412_write_reg(imx412, IMX412_REG_LPFR, 2, lpfr); if (ret) goto error_release_group_hold; ret = imx412_write_reg(imx412, IMX412_REG_EXPOSURE_CIT, 2, shutter); if (ret) goto error_release_group_hold; ret = imx412_write_reg(imx412, IMX412_REG_AGAIN, 2, gain); error_release_group_hold: imx412_write_reg(imx412, IMX412_REG_HOLD, 1, 0); return ret; } /** * imx412_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 imx412_set_ctrl(struct v4l2_ctrl *ctrl) { struct imx412 *imx412 = container_of(ctrl->handler, struct imx412, ctrl_handler); u32 analog_gain; u32 exposure; int ret; switch (ctrl->id) { case V4L2_CID_VBLANK: imx412->vblank = imx412->vblank_ctrl->val; dev_dbg(imx412->dev, "Received vblank %u, new lpfr %u", imx412->vblank, imx412->vblank + imx412->cur_mode->height); ret = __v4l2_ctrl_modify_range(imx412->exp_ctrl, IMX412_EXPOSURE_MIN, imx412->vblank + imx412->cur_mode->height - IMX412_EXPOSURE_OFFSET, 1, IMX412_EXPOSURE_DEFAULT); break; case V4L2_CID_EXPOSURE: /* Set controls only if sensor is in power on state */ if (!pm_runtime_get_if_in_use(imx412->dev)) return 0; exposure = ctrl->val; analog_gain = imx412->again_ctrl->val; dev_dbg(imx412->dev, "Received exp %u, analog gain %u", exposure, analog_gain); ret = imx412_update_exp_gain(imx412, exposure, analog_gain); pm_runtime_put(imx412->dev); break; default: dev_err(imx412->dev, "Invalid control %d", ctrl->id); ret = -EINVAL; } return ret; } /* V4l2 subdevice control ops*/ static const struct v4l2_ctrl_ops imx412_ctrl_ops = { .s_ctrl = imx412_set_ctrl, }; /** * imx412_enum_mbus_code() - Enumerate V4L2 sub-device mbus codes * @sd: pointer to imx412 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 imx412_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; } /** * imx412_enum_frame_size() - Enumerate V4L2 sub-device frame sizes * @sd: pointer to imx412 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 imx412_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; } /** * imx412_fill_pad_format() - Fill subdevice pad format * from selected sensor mode * @imx412: pointer to imx412 device * @mode: pointer to imx412_mode sensor mode * @fmt: V4L2 sub-device format need to be filled */ static void imx412_fill_pad_format(struct imx412 *imx412, const struct imx412_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; } /** * imx412_get_pad_format() - Get subdevice pad format * @sd: pointer to imx412 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 imx412_get_pad_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { struct imx412 *imx412 = to_imx412(sd); mutex_lock(&imx412->mutex); if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { struct v4l2_mbus_framefmt *framefmt; framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad); fmt->format = *framefmt; } else { imx412_fill_pad_format(imx412, imx412->cur_mode, fmt); } mutex_unlock(&imx412->mutex); return 0; } /** * imx412_set_pad_format() - Set subdevice pad format * @sd: pointer to imx412 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 imx412_set_pad_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { struct imx412 *imx412 = to_imx412(sd); const struct imx412_mode *mode; int ret = 0; mutex_lock(&imx412->mutex); mode = &supported_mode; imx412_fill_pad_format(imx412, mode, fmt); if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { struct v4l2_mbus_framefmt *framefmt; framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad); *framefmt = fmt->format; } else { ret = imx412_update_controls(imx412, mode); if (!ret) imx412->cur_mode = mode; } mutex_unlock(&imx412->mutex); return ret; } /** * imx412_init_state() - Initialize sub-device state * @sd: pointer to imx412 V4L2 sub-device structure * @sd_state: V4L2 sub-device configuration * * Return: 0 if successful, error code otherwise. */ static int imx412_init_state(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state) { struct imx412 *imx412 = to_imx412(sd); struct v4l2_subdev_format fmt = { 0 }; fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; imx412_fill_pad_format(imx412, &supported_mode, &fmt); return imx412_set_pad_format(sd, sd_state, &fmt); } /** * imx412_start_streaming() - Start sensor stream * @imx412: pointer to imx412 device * * Return: 0 if successful, error code otherwise. */ static int imx412_start_streaming(struct imx412 *imx412) { const struct imx412_reg_list *reg_list; int ret; /* Write sensor mode registers */ reg_list = &imx412->cur_mode->reg_list; ret = imx412_write_regs(imx412, reg_list->regs, reg_list->num_of_regs); if (ret) { dev_err(imx412->dev, "fail to write initial registers"); return ret; } /* Setup handler will write actual exposure and gain */ ret = __v4l2_ctrl_handler_setup(imx412->sd.ctrl_handler); if (ret) { dev_err(imx412->dev, "fail to setup handler"); return ret; } /* Delay is required before streaming*/ usleep_range(7400, 8000); /* Start streaming */ ret = imx412_write_reg(imx412, IMX412_REG_MODE_SELECT, 1, IMX412_MODE_STREAMING); if (ret) { dev_err(imx412->dev, "fail to start streaming"); return ret; } return 0; } /** * imx412_stop_streaming() - Stop sensor stream * @imx412: pointer to imx412 device * * Return: 0 if successful, error code otherwise. */ static int imx412_stop_streaming(struct imx412 *imx412) { return imx412_write_reg(imx412, IMX412_REG_MODE_SELECT, 1, IMX412_MODE_STANDBY); } /** * imx412_set_stream() - Enable sensor streaming * @sd: pointer to imx412 subdevice * @enable: set to enable sensor streaming * * Return: 0 if successful, error code otherwise. */ static int imx412_set_stream(struct v4l2_subdev *sd, int enable) { struct imx412 *imx412 = to_imx412(sd); int ret; mutex_lock(&imx412->mutex); if (enable) { ret = pm_runtime_resume_and_get(imx412->dev); if (ret) goto error_unlock; ret = imx412_start_streaming(imx412); if (ret) goto error_power_off; } else { imx412_stop_streaming(imx412); pm_runtime_put(imx412->dev); } mutex_unlock(&imx412->mutex); return 0; error_power_off: pm_runtime_put(imx412->dev); error_unlock: mutex_unlock(&imx412->mutex); return ret; } /** * imx412_detect() - Detect imx412 sensor * @imx412: pointer to imx412 device * * Return: 0 if successful, -EIO if sensor id does not match */ static int imx412_detect(struct imx412 *imx412) { int ret; u32 val; ret = imx412_read_reg(imx412, IMX412_REG_ID, 2, &val); if (ret) return ret; if (val != IMX412_ID) { dev_err(imx412->dev, "chip id mismatch: %x!=%x", IMX412_ID, val); return -ENXIO; } return 0; } /** * imx412_parse_hw_config() - Parse HW configuration and check if supported * @imx412: pointer to imx412 device * * Return: 0 if successful, error code otherwise. */ static int imx412_parse_hw_config(struct imx412 *imx412) { struct fwnode_handle *fwnode = dev_fwnode(imx412->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 */ imx412->reset_gpio = devm_gpiod_get_optional(imx412->dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(imx412->reset_gpio)) { dev_err(imx412->dev, "failed to get reset gpio %ld", PTR_ERR(imx412->reset_gpio)); return PTR_ERR(imx412->reset_gpio); } /* Get sensor input clock */ imx412->inclk = devm_clk_get(imx412->dev, NULL); if (IS_ERR(imx412->inclk)) { dev_err(imx412->dev, "could not get inclk"); return PTR_ERR(imx412->inclk); } rate = clk_get_rate(imx412->inclk); if (rate != IMX412_INCLK_RATE) { dev_err(imx412->dev, "inclk frequency mismatch"); return -EINVAL; } /* Get optional DT defined regulators */ for (i = 0; i < ARRAY_SIZE(imx412_supply_names); i++) imx412->supplies[i].supply = imx412_supply_names[i]; ret = devm_regulator_bulk_get(imx412->dev, ARRAY_SIZE(imx412_supply_names), imx412->supplies); if (ret) return ret; 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 != IMX412_NUM_DATA_LANES) { dev_err(imx412->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(imx412->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] == IMX412_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 imx412_video_ops = { .s_stream = imx412_set_stream, }; static const struct v4l2_subdev_pad_ops imx412_pad_ops = { .enum_mbus_code = imx412_enum_mbus_code, .enum_frame_size = imx412_enum_frame_size, .get_fmt = imx412_get_pad_format, .set_fmt = imx412_set_pad_format, }; static const struct v4l2_subdev_ops imx412_subdev_ops = { .video = &imx412_video_ops, .pad = &imx412_pad_ops, }; static const struct v4l2_subdev_internal_ops imx412_internal_ops = { .init_state = imx412_init_state, }; /** * imx412_power_on() - Sensor power on sequence * @dev: pointer to i2c device * * Return: 0 if successful, error code otherwise. */ static int imx412_power_on(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct imx412 *imx412 = to_imx412(sd); int ret; ret = regulator_bulk_enable(ARRAY_SIZE(imx412_supply_names), imx412->supplies); if (ret < 0) { dev_err(dev, "failed to enable regulators\n"); return ret; } gpiod_set_value_cansleep(imx412->reset_gpio, 0); ret = clk_prepare_enable(imx412->inclk); if (ret) { dev_err(imx412->dev, "fail to enable inclk"); goto error_reset; } usleep_range(1000, 1200); return 0; error_reset: gpiod_set_value_cansleep(imx412->reset_gpio, 1); regulator_bulk_disable(ARRAY_SIZE(imx412_supply_names), imx412->supplies); return ret; } /** * imx412_power_off() - Sensor power off sequence * @dev: pointer to i2c device * * Return: 0 if successful, error code otherwise. */ static int imx412_power_off(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct imx412 *imx412 = to_imx412(sd); clk_disable_unprepare(imx412->inclk); gpiod_set_value_cansleep(imx412->reset_gpio, 1); regulator_bulk_disable(ARRAY_SIZE(imx412_supply_names), imx412->supplies); return 0; } /** * imx412_init_controls() - Initialize sensor subdevice controls * @imx412: pointer to imx412 device * * Return: 0 if successful, error code otherwise. */ static int imx412_init_controls(struct imx412 *imx412) { struct v4l2_ctrl_handler *ctrl_hdlr = &imx412->ctrl_handler; const struct imx412_mode *mode = imx412->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 = &imx412->mutex; /* Initialize exposure and gain */ lpfr = mode->vblank + mode->height; imx412->exp_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &imx412_ctrl_ops, V4L2_CID_EXPOSURE, IMX412_EXPOSURE_MIN, lpfr - IMX412_EXPOSURE_OFFSET, IMX412_EXPOSURE_STEP, IMX412_EXPOSURE_DEFAULT); imx412->again_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &imx412_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, IMX412_AGAIN_MIN, IMX412_AGAIN_MAX, IMX412_AGAIN_STEP, IMX412_AGAIN_DEFAULT); v4l2_ctrl_cluster(2, &imx412->exp_ctrl); imx412->vblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &imx412_ctrl_ops, V4L2_CID_VBLANK, mode->vblank_min, mode->vblank_max, 1, mode->vblank); /* Read only controls */ imx412->pclk_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &imx412_ctrl_ops, V4L2_CID_PIXEL_RATE, mode->pclk, mode->pclk, 1, mode->pclk); imx412->link_freq_ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr, &imx412_ctrl_ops, V4L2_CID_LINK_FREQ, ARRAY_SIZE(link_freq) - 1, mode->link_freq_idx, link_freq); if (imx412->link_freq_ctrl) imx412->link_freq_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; imx412->hblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &imx412_ctrl_ops, V4L2_CID_HBLANK, IMX412_REG_MIN, IMX412_REG_MAX, 1, mode->hblank); if (imx412->hblank_ctrl) imx412->hblank_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; if (ctrl_hdlr->error) { dev_err(imx412->dev, "control init failed: %d", ctrl_hdlr->error); v4l2_ctrl_handler_free(ctrl_hdlr); return ctrl_hdlr->error; } imx412->sd.ctrl_handler = ctrl_hdlr; return 0; } /** * imx412_probe() - I2C client device binding * @client: pointer to i2c client device * * Return: 0 if successful, error code otherwise. */ static int imx412_probe(struct i2c_client *client) { struct imx412 *imx412; const char *name; int ret; imx412 = devm_kzalloc(&client->dev, sizeof(*imx412), GFP_KERNEL); if (!imx412) return -ENOMEM; imx412->dev = &client->dev; name = device_get_match_data(&client->dev); if (!name) return -ENODEV; /* Initialize subdev */ v4l2_i2c_subdev_init(&imx412->sd, client, &imx412_subdev_ops); imx412->sd.internal_ops = &imx412_internal_ops; ret = imx412_parse_hw_config(imx412); if (ret) { dev_err(imx412->dev, "HW configuration is not supported"); return ret; } mutex_init(&imx412->mutex); ret = imx412_power_on(imx412->dev); if (ret) { dev_err(imx412->dev, "failed to power-on the sensor"); goto error_mutex_destroy; } /* Check module identity */ ret = imx412_detect(imx412); if (ret) { dev_err(imx412->dev, "failed to find sensor: %d", ret); goto error_power_off; } /* Set default mode to max resolution */ imx412->cur_mode = &supported_mode; imx412->vblank = imx412->cur_mode->vblank; ret = imx412_init_controls(imx412); if (ret) { dev_err(imx412->dev, "failed to init controls: %d", ret); goto error_power_off; } /* Initialize subdev */ imx412->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; imx412->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; v4l2_i2c_subdev_set_name(&imx412->sd, client, name, NULL); /* Initialize source pad */ imx412->pad.flags = MEDIA_PAD_FL_SOURCE; ret = media_entity_pads_init(&imx412->sd.entity, 1, &imx412->pad); if (ret) { dev_err(imx412->dev, "failed to init entity pads: %d", ret); goto error_handler_free; } ret = v4l2_async_register_subdev_sensor(&imx412->sd); if (ret < 0) { dev_err(imx412->dev, "failed to register async subdev: %d", ret); goto error_media_entity; } pm_runtime_set_active(imx412->dev); pm_runtime_enable(imx412->dev); pm_runtime_idle(imx412->dev); return 0; error_media_entity: media_entity_cleanup(&imx412->sd.entity); error_handler_free: v4l2_ctrl_handler_free(imx412->sd.ctrl_handler); error_power_off: imx412_power_off(imx412->dev); error_mutex_destroy: mutex_destroy(&imx412->mutex); return ret; } /** * imx412_remove() - I2C client device unbinding * @client: pointer to I2C client device * * Return: 0 if successful, error code otherwise. */ static void imx412_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct imx412 *imx412 = to_imx412(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)) imx412_power_off(&client->dev); pm_runtime_set_suspended(&client->dev); mutex_destroy(&imx412->mutex); } static const struct dev_pm_ops imx412_pm_ops = { SET_RUNTIME_PM_OPS(imx412_power_off, imx412_power_on, NULL) }; static const struct of_device_id imx412_of_match[] = { { .compatible = "sony,imx412", .data = "imx412" }, { .compatible = "sony,imx577", .data = "imx577" }, { } }; MODULE_DEVICE_TABLE(of, imx412_of_match); static struct i2c_driver imx412_driver = { .probe = imx412_probe, .remove = imx412_remove, .driver = { .name = "imx412", .pm = &imx412_pm_ops, .of_match_table = imx412_of_match, }, }; module_i2c_driver(imx412_driver); MODULE_DESCRIPTION("Sony imx412 sensor driver"); MODULE_LICENSE("GPL");