diff options
Diffstat (limited to 'drivers/media/i2c/imx412.c')
| -rw-r--r-- | drivers/media/i2c/imx412.c | 1301 |
1 files changed, 1301 insertions, 0 deletions
diff --git a/drivers/media/i2c/imx412.c b/drivers/media/i2c/imx412.c new file mode 100644 index 000000000..7f6d29e0e --- /dev/null +++ b/drivers/media/i2c/imx412.c @@ -0,0 +1,1301 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Sony imx412 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-fwnode.h> +#include <media/v4l2-subdev.h> + +/* 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 + * @streaming: Flag indicating streaming state + */ +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; + bool streaming; +}; + +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_get_try_format(sd, 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_get_try_format(sd, 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_pad_cfg() - Initialize sub-device pad configuration + * @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_pad_cfg(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 (imx412->streaming == enable) { + mutex_unlock(&imx412->mutex); + return 0; + } + + 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); + } + + imx412->streaming = enable; + + 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 = { + .init_cfg = imx412_init_pad_cfg, + .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, +}; + +/** + * 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; + int ret; + + imx412 = devm_kzalloc(&client->dev, sizeof(*imx412), GFP_KERNEL); + if (!imx412) + return -ENOMEM; + + imx412->dev = &client->dev; + + /* Initialize subdev */ + v4l2_i2c_subdev_init(&imx412->sd, client, &imx412_subdev_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; + + /* 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" }, + { } +}; + +MODULE_DEVICE_TABLE(of, imx412_of_match); + +static struct i2c_driver imx412_driver = { + .probe_new = 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"); |