diff options
Diffstat (limited to 'drivers/media/i2c/imx219.c')
| -rw-r--r-- | drivers/media/i2c/imx219.c | 1406 |
1 files changed, 1406 insertions, 0 deletions
diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c new file mode 100644 index 000000000..3afa3f79c --- /dev/null +++ b/drivers/media/i2c/imx219.c @@ -0,0 +1,1406 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * A V4L2 driver for Sony IMX219 cameras. + * Copyright (C) 2019, Raspberry Pi (Trading) Ltd + * + * Based on Sony imx258 camera driver + * Copyright (C) 2018 Intel Corporation + * + * DT / fwnode changes, and regulator / GPIO control taken from imx214 driver + * Copyright 2018 Qtechnology A/S + * + * Flip handling taken from the Sony IMX319 driver. + * Copyright (C) 2018 Intel Corporation + * + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> + +#include <media/v4l2-cci.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/v4l2-event.h> +#include <media/v4l2-fwnode.h> +#include <media/v4l2-mediabus.h> + +/* Chip ID */ +#define IMX219_REG_CHIP_ID CCI_REG16(0x0000) +#define IMX219_CHIP_ID 0x0219 + +#define IMX219_REG_MODE_SELECT CCI_REG8(0x0100) +#define IMX219_MODE_STANDBY 0x00 +#define IMX219_MODE_STREAMING 0x01 + +#define IMX219_REG_CSI_LANE_MODE CCI_REG8(0x0114) +#define IMX219_CSI_2_LANE_MODE 0x01 +#define IMX219_CSI_4_LANE_MODE 0x03 + +#define IMX219_REG_DPHY_CTRL CCI_REG8(0x0128) +#define IMX219_DPHY_CTRL_TIMING_AUTO 0 +#define IMX219_DPHY_CTRL_TIMING_MANUAL 1 + +#define IMX219_REG_EXCK_FREQ CCI_REG16(0x012a) +#define IMX219_EXCK_FREQ(n) ((n) * 256) /* n expressed in MHz */ + +/* Analog gain control */ +#define IMX219_REG_ANALOG_GAIN CCI_REG8(0x0157) +#define IMX219_ANA_GAIN_MIN 0 +#define IMX219_ANA_GAIN_MAX 232 +#define IMX219_ANA_GAIN_STEP 1 +#define IMX219_ANA_GAIN_DEFAULT 0x0 + +/* Digital gain control */ +#define IMX219_REG_DIGITAL_GAIN CCI_REG16(0x0158) +#define IMX219_DGTL_GAIN_MIN 0x0100 +#define IMX219_DGTL_GAIN_MAX 0x0fff +#define IMX219_DGTL_GAIN_DEFAULT 0x0100 +#define IMX219_DGTL_GAIN_STEP 1 + +/* Exposure control */ +#define IMX219_REG_EXPOSURE CCI_REG16(0x015a) +#define IMX219_EXPOSURE_MIN 4 +#define IMX219_EXPOSURE_STEP 1 +#define IMX219_EXPOSURE_DEFAULT 0x640 +#define IMX219_EXPOSURE_MAX 65535 + +/* V_TIMING internal */ +#define IMX219_REG_VTS CCI_REG16(0x0160) +#define IMX219_VTS_15FPS 0x0dc6 +#define IMX219_VTS_30FPS_1080P 0x06e3 +#define IMX219_VTS_30FPS_BINNED 0x06e3 +#define IMX219_VTS_30FPS_640x480 0x06e3 +#define IMX219_VTS_MAX 0xffff + +#define IMX219_VBLANK_MIN 4 + +/*Frame Length Line*/ +#define IMX219_FLL_MIN 0x08a6 +#define IMX219_FLL_MAX 0xffff +#define IMX219_FLL_STEP 1 +#define IMX219_FLL_DEFAULT 0x0c98 + +/* HBLANK control - read only */ +#define IMX219_PPL_DEFAULT 3448 + +#define IMX219_REG_LINE_LENGTH_A CCI_REG16(0x0162) +#define IMX219_REG_X_ADD_STA_A CCI_REG16(0x0164) +#define IMX219_REG_X_ADD_END_A CCI_REG16(0x0166) +#define IMX219_REG_Y_ADD_STA_A CCI_REG16(0x0168) +#define IMX219_REG_Y_ADD_END_A CCI_REG16(0x016a) +#define IMX219_REG_X_OUTPUT_SIZE CCI_REG16(0x016c) +#define IMX219_REG_Y_OUTPUT_SIZE CCI_REG16(0x016e) +#define IMX219_REG_X_ODD_INC_A CCI_REG8(0x0170) +#define IMX219_REG_Y_ODD_INC_A CCI_REG8(0x0171) +#define IMX219_REG_ORIENTATION CCI_REG8(0x0172) + +/* Binning Mode */ +#define IMX219_REG_BINNING_MODE CCI_REG16(0x0174) +#define IMX219_BINNING_NONE 0x0000 +#define IMX219_BINNING_2X2 0x0101 +#define IMX219_BINNING_2X2_ANALOG 0x0303 + +#define IMX219_REG_CSI_DATA_FORMAT_A CCI_REG16(0x018c) + +/* PLL Settings */ +#define IMX219_REG_VTPXCK_DIV CCI_REG8(0x0301) +#define IMX219_REG_VTSYCK_DIV CCI_REG8(0x0303) +#define IMX219_REG_PREPLLCK_VT_DIV CCI_REG8(0x0304) +#define IMX219_REG_PREPLLCK_OP_DIV CCI_REG8(0x0305) +#define IMX219_REG_PLL_VT_MPY CCI_REG16(0x0306) +#define IMX219_REG_OPPXCK_DIV CCI_REG8(0x0309) +#define IMX219_REG_OPSYCK_DIV CCI_REG8(0x030b) +#define IMX219_REG_PLL_OP_MPY CCI_REG16(0x030c) + +/* Test Pattern Control */ +#define IMX219_REG_TEST_PATTERN CCI_REG16(0x0600) +#define IMX219_TEST_PATTERN_DISABLE 0 +#define IMX219_TEST_PATTERN_SOLID_COLOR 1 +#define IMX219_TEST_PATTERN_COLOR_BARS 2 +#define IMX219_TEST_PATTERN_GREY_COLOR 3 +#define IMX219_TEST_PATTERN_PN9 4 + +/* Test pattern colour components */ +#define IMX219_REG_TESTP_RED CCI_REG16(0x0602) +#define IMX219_REG_TESTP_GREENR CCI_REG16(0x0604) +#define IMX219_REG_TESTP_BLUE CCI_REG16(0x0606) +#define IMX219_REG_TESTP_GREENB CCI_REG16(0x0608) +#define IMX219_TESTP_COLOUR_MIN 0 +#define IMX219_TESTP_COLOUR_MAX 0x03ff +#define IMX219_TESTP_COLOUR_STEP 1 +#define IMX219_TESTP_RED_DEFAULT IMX219_TESTP_COLOUR_MAX +#define IMX219_TESTP_GREENR_DEFAULT 0 +#define IMX219_TESTP_BLUE_DEFAULT 0 +#define IMX219_TESTP_GREENB_DEFAULT 0 + +#define IMX219_REG_TP_WINDOW_WIDTH CCI_REG16(0x0624) +#define IMX219_REG_TP_WINDOW_HEIGHT CCI_REG16(0x0626) + +/* External clock frequency is 24.0M */ +#define IMX219_XCLK_FREQ 24000000 + +/* Pixel rate is fixed for all the modes */ +#define IMX219_PIXEL_RATE 182400000 +#define IMX219_PIXEL_RATE_4LANE 280800000 + +#define IMX219_DEFAULT_LINK_FREQ 456000000 +#define IMX219_DEFAULT_LINK_FREQ_4LANE 363000000 + +/* IMX219 native and active pixel array size. */ +#define IMX219_NATIVE_WIDTH 3296U +#define IMX219_NATIVE_HEIGHT 2480U +#define IMX219_PIXEL_ARRAY_LEFT 8U +#define IMX219_PIXEL_ARRAY_TOP 8U +#define IMX219_PIXEL_ARRAY_WIDTH 3280U +#define IMX219_PIXEL_ARRAY_HEIGHT 2464U + +struct imx219_reg_list { + unsigned int num_of_regs; + const struct cci_reg_sequence *regs; +}; + +/* Mode : resolution and related config&values */ +struct imx219_mode { + /* Frame width */ + unsigned int width; + /* Frame height */ + unsigned int height; + + /* Analog crop rectangle. */ + struct v4l2_rect crop; + + /* V-timing */ + unsigned int vts_def; + + /* Default register values */ + struct imx219_reg_list reg_list; + + /* 2x2 binning is used */ + bool binning; +}; + +static const struct cci_reg_sequence imx219_common_regs[] = { + { IMX219_REG_MODE_SELECT, 0x00 }, /* Mode Select */ + + /* To Access Addresses 3000-5fff, send the following commands */ + { CCI_REG8(0x30eb), 0x0c }, + { CCI_REG8(0x30eb), 0x05 }, + { CCI_REG8(0x300a), 0xff }, + { CCI_REG8(0x300b), 0xff }, + { CCI_REG8(0x30eb), 0x05 }, + { CCI_REG8(0x30eb), 0x09 }, + + /* PLL Clock Table */ + { IMX219_REG_VTPXCK_DIV, 5 }, + { IMX219_REG_VTSYCK_DIV, 1 }, + { IMX219_REG_PREPLLCK_VT_DIV, 3 }, /* 0x03 = AUTO set */ + { IMX219_REG_PREPLLCK_OP_DIV, 3 }, /* 0x03 = AUTO set */ + { IMX219_REG_PLL_VT_MPY, 57 }, + { IMX219_REG_OPSYCK_DIV, 1 }, + { IMX219_REG_PLL_OP_MPY, 114 }, + + /* Undocumented registers */ + { CCI_REG8(0x455e), 0x00 }, + { CCI_REG8(0x471e), 0x4b }, + { CCI_REG8(0x4767), 0x0f }, + { CCI_REG8(0x4750), 0x14 }, + { CCI_REG8(0x4540), 0x00 }, + { CCI_REG8(0x47b4), 0x14 }, + { CCI_REG8(0x4713), 0x30 }, + { CCI_REG8(0x478b), 0x10 }, + { CCI_REG8(0x478f), 0x10 }, + { CCI_REG8(0x4793), 0x10 }, + { CCI_REG8(0x4797), 0x0e }, + { CCI_REG8(0x479b), 0x0e }, + + /* Frame Bank Register Group "A" */ + { IMX219_REG_LINE_LENGTH_A, 3448 }, + { IMX219_REG_X_ODD_INC_A, 1 }, + { IMX219_REG_Y_ODD_INC_A, 1 }, + + /* Output setup registers */ + { IMX219_REG_DPHY_CTRL, IMX219_DPHY_CTRL_TIMING_AUTO }, + { IMX219_REG_EXCK_FREQ, IMX219_EXCK_FREQ(IMX219_XCLK_FREQ / 1000000) }, +}; + +/* + * Register sets lifted off the i2C interface from the Raspberry Pi firmware + * driver. + * 3280x2464 = mode 2, 1920x1080 = mode 1, 1640x1232 = mode 4, 640x480 = mode 7. + */ +static const struct cci_reg_sequence mode_3280x2464_regs[] = { + { IMX219_REG_X_ADD_STA_A, 0 }, + { IMX219_REG_X_ADD_END_A, 3279 }, + { IMX219_REG_Y_ADD_STA_A, 0 }, + { IMX219_REG_Y_ADD_END_A, 2463 }, + { IMX219_REG_X_OUTPUT_SIZE, 3280 }, + { IMX219_REG_Y_OUTPUT_SIZE, 2464 }, + { IMX219_REG_TP_WINDOW_WIDTH, 3280 }, + { IMX219_REG_TP_WINDOW_HEIGHT, 2464 }, +}; + +static const struct cci_reg_sequence mode_1920_1080_regs[] = { + { IMX219_REG_X_ADD_STA_A, 680 }, + { IMX219_REG_X_ADD_END_A, 2599 }, + { IMX219_REG_Y_ADD_STA_A, 692 }, + { IMX219_REG_Y_ADD_END_A, 1771 }, + { IMX219_REG_X_OUTPUT_SIZE, 1920 }, + { IMX219_REG_Y_OUTPUT_SIZE, 1080 }, + { IMX219_REG_TP_WINDOW_WIDTH, 1920 }, + { IMX219_REG_TP_WINDOW_HEIGHT, 1080 }, +}; + +static const struct cci_reg_sequence mode_1640_1232_regs[] = { + { IMX219_REG_X_ADD_STA_A, 0 }, + { IMX219_REG_X_ADD_END_A, 3279 }, + { IMX219_REG_Y_ADD_STA_A, 0 }, + { IMX219_REG_Y_ADD_END_A, 2463 }, + { IMX219_REG_X_OUTPUT_SIZE, 1640 }, + { IMX219_REG_Y_OUTPUT_SIZE, 1232 }, + { IMX219_REG_TP_WINDOW_WIDTH, 1640 }, + { IMX219_REG_TP_WINDOW_HEIGHT, 1232 }, +}; + +static const struct cci_reg_sequence mode_640_480_regs[] = { + { IMX219_REG_X_ADD_STA_A, 1000 }, + { IMX219_REG_X_ADD_END_A, 2279 }, + { IMX219_REG_Y_ADD_STA_A, 752 }, + { IMX219_REG_Y_ADD_END_A, 1711 }, + { IMX219_REG_X_OUTPUT_SIZE, 640 }, + { IMX219_REG_Y_OUTPUT_SIZE, 480 }, + { IMX219_REG_TP_WINDOW_WIDTH, 1640 }, + { IMX219_REG_TP_WINDOW_HEIGHT, 1232 }, +}; + +static const struct cci_reg_sequence raw8_framefmt_regs[] = { + { IMX219_REG_CSI_DATA_FORMAT_A, 0x0808 }, + { IMX219_REG_OPPXCK_DIV, 8 }, +}; + +static const struct cci_reg_sequence raw10_framefmt_regs[] = { + { IMX219_REG_CSI_DATA_FORMAT_A, 0x0a0a }, + { IMX219_REG_OPPXCK_DIV, 10 }, +}; + +static const s64 imx219_link_freq_menu[] = { + IMX219_DEFAULT_LINK_FREQ, +}; + +static const s64 imx219_link_freq_4lane_menu[] = { + IMX219_DEFAULT_LINK_FREQ_4LANE, +}; + +static const char * const imx219_test_pattern_menu[] = { + "Disabled", + "Color Bars", + "Solid Color", + "Grey Color Bars", + "PN9" +}; + +static const int imx219_test_pattern_val[] = { + IMX219_TEST_PATTERN_DISABLE, + IMX219_TEST_PATTERN_COLOR_BARS, + IMX219_TEST_PATTERN_SOLID_COLOR, + IMX219_TEST_PATTERN_GREY_COLOR, + IMX219_TEST_PATTERN_PN9, +}; + +/* regulator supplies */ +static const char * const imx219_supply_name[] = { + /* Supplies can be enabled in any order */ + "VANA", /* Analog (2.8V) supply */ + "VDIG", /* Digital Core (1.8V) supply */ + "VDDL", /* IF (1.2V) supply */ +}; + +#define IMX219_NUM_SUPPLIES ARRAY_SIZE(imx219_supply_name) + +/* + * The supported formats. + * This table MUST contain 4 entries per format, to cover the various flip + * combinations in the order + * - no flip + * - h flip + * - v flip + * - h&v flips + */ +static const u32 imx219_mbus_formats[] = { + MEDIA_BUS_FMT_SRGGB10_1X10, + MEDIA_BUS_FMT_SGRBG10_1X10, + MEDIA_BUS_FMT_SGBRG10_1X10, + MEDIA_BUS_FMT_SBGGR10_1X10, + + MEDIA_BUS_FMT_SRGGB8_1X8, + MEDIA_BUS_FMT_SGRBG8_1X8, + MEDIA_BUS_FMT_SGBRG8_1X8, + MEDIA_BUS_FMT_SBGGR8_1X8, +}; + +/* + * Initialisation delay between XCLR low->high and the moment when the sensor + * can start capture (i.e. can leave software stanby) must be not less than: + * t4 + max(t5, t6 + <time to initialize the sensor register over I2C>) + * where + * t4 is fixed, and is max 200uS, + * t5 is fixed, and is 6000uS, + * t6 depends on the sensor external clock, and is max 32000 clock periods. + * As per sensor datasheet, the external clock must be from 6MHz to 27MHz. + * So for any acceptable external clock t6 is always within the range of + * 1185 to 5333 uS, and is always less than t5. + * For this reason this is always safe to wait (t4 + t5) = 6200 uS, then + * initialize the sensor over I2C, and then exit the software standby. + * + * This start-up time can be optimized a bit more, if we start the writes + * over I2C after (t4+t6), but before (t4+t5) expires. But then sensor + * initialization over I2C may complete before (t4+t5) expires, and we must + * ensure that capture is not started before (t4+t5). + * + * This delay doesn't account for the power supply startup time. If needed, + * this should be taken care of via the regulator framework. E.g. in the + * case of DT for regulator-fixed one should define the startup-delay-us + * property. + */ +#define IMX219_XCLR_MIN_DELAY_US 6200 +#define IMX219_XCLR_DELAY_RANGE_US 1000 + +/* Mode configs */ +static const struct imx219_mode supported_modes[] = { + { + /* 8MPix 15fps mode */ + .width = 3280, + .height = 2464, + .crop = { + .left = IMX219_PIXEL_ARRAY_LEFT, + .top = IMX219_PIXEL_ARRAY_TOP, + .width = 3280, + .height = 2464 + }, + .vts_def = IMX219_VTS_15FPS, + .reg_list = { + .num_of_regs = ARRAY_SIZE(mode_3280x2464_regs), + .regs = mode_3280x2464_regs, + }, + .binning = false, + }, + { + /* 1080P 30fps cropped */ + .width = 1920, + .height = 1080, + .crop = { + .left = 688, + .top = 700, + .width = 1920, + .height = 1080 + }, + .vts_def = IMX219_VTS_30FPS_1080P, + .reg_list = { + .num_of_regs = ARRAY_SIZE(mode_1920_1080_regs), + .regs = mode_1920_1080_regs, + }, + .binning = false, + }, + { + /* 2x2 binned 30fps mode */ + .width = 1640, + .height = 1232, + .crop = { + .left = IMX219_PIXEL_ARRAY_LEFT, + .top = IMX219_PIXEL_ARRAY_TOP, + .width = 3280, + .height = 2464 + }, + .vts_def = IMX219_VTS_30FPS_BINNED, + .reg_list = { + .num_of_regs = ARRAY_SIZE(mode_1640_1232_regs), + .regs = mode_1640_1232_regs, + }, + .binning = true, + }, + { + /* 640x480 30fps mode */ + .width = 640, + .height = 480, + .crop = { + .left = 1008, + .top = 760, + .width = 1280, + .height = 960 + }, + .vts_def = IMX219_VTS_30FPS_640x480, + .reg_list = { + .num_of_regs = ARRAY_SIZE(mode_640_480_regs), + .regs = mode_640_480_regs, + }, + .binning = true, + }, +}; + +struct imx219 { + struct v4l2_subdev sd; + struct media_pad pad; + + struct regmap *regmap; + struct clk *xclk; /* system clock to IMX219 */ + u32 xclk_freq; + + struct gpio_desc *reset_gpio; + struct regulator_bulk_data supplies[IMX219_NUM_SUPPLIES]; + + struct v4l2_ctrl_handler ctrl_handler; + /* V4L2 Controls */ + struct v4l2_ctrl *pixel_rate; + struct v4l2_ctrl *link_freq; + struct v4l2_ctrl *exposure; + struct v4l2_ctrl *vflip; + struct v4l2_ctrl *hflip; + struct v4l2_ctrl *vblank; + struct v4l2_ctrl *hblank; + + /* Current mode */ + const struct imx219_mode *mode; + + /* Streaming on/off */ + bool streaming; + + /* Two or Four lanes */ + u8 lanes; +}; + +static inline struct imx219 *to_imx219(struct v4l2_subdev *_sd) +{ + return container_of(_sd, struct imx219, sd); +} + +/* Get bayer order based on flip setting. */ +static u32 imx219_get_format_code(struct imx219 *imx219, u32 code) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(imx219_mbus_formats); i++) + if (imx219_mbus_formats[i] == code) + break; + + if (i >= ARRAY_SIZE(imx219_mbus_formats)) + i = 0; + + i = (i & ~3) | (imx219->vflip->val ? 2 : 0) | + (imx219->hflip->val ? 1 : 0); + + return imx219_mbus_formats[i]; +} + +static int imx219_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct imx219 *imx219 = + container_of(ctrl->handler, struct imx219, ctrl_handler); + struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd); + int ret = 0; + + if (ctrl->id == V4L2_CID_VBLANK) { + int exposure_max, exposure_def; + + /* Update max exposure while meeting expected vblanking */ + exposure_max = imx219->mode->height + ctrl->val - 4; + exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ? + exposure_max : IMX219_EXPOSURE_DEFAULT; + __v4l2_ctrl_modify_range(imx219->exposure, + imx219->exposure->minimum, + exposure_max, imx219->exposure->step, + exposure_def); + } + + /* + * Applying V4L2 control value only happens + * when power is up for streaming + */ + if (pm_runtime_get_if_in_use(&client->dev) == 0) + return 0; + + switch (ctrl->id) { + case V4L2_CID_ANALOGUE_GAIN: + cci_write(imx219->regmap, IMX219_REG_ANALOG_GAIN, + ctrl->val, &ret); + break; + case V4L2_CID_EXPOSURE: + cci_write(imx219->regmap, IMX219_REG_EXPOSURE, + ctrl->val, &ret); + break; + case V4L2_CID_DIGITAL_GAIN: + cci_write(imx219->regmap, IMX219_REG_DIGITAL_GAIN, + ctrl->val, &ret); + break; + case V4L2_CID_TEST_PATTERN: + cci_write(imx219->regmap, IMX219_REG_TEST_PATTERN, + imx219_test_pattern_val[ctrl->val], &ret); + break; + case V4L2_CID_HFLIP: + case V4L2_CID_VFLIP: + cci_write(imx219->regmap, IMX219_REG_ORIENTATION, + imx219->hflip->val | imx219->vflip->val << 1, &ret); + break; + case V4L2_CID_VBLANK: + cci_write(imx219->regmap, IMX219_REG_VTS, + imx219->mode->height + ctrl->val, &ret); + break; + case V4L2_CID_TEST_PATTERN_RED: + cci_write(imx219->regmap, IMX219_REG_TESTP_RED, + ctrl->val, &ret); + break; + case V4L2_CID_TEST_PATTERN_GREENR: + cci_write(imx219->regmap, IMX219_REG_TESTP_GREENR, + ctrl->val, &ret); + break; + case V4L2_CID_TEST_PATTERN_BLUE: + cci_write(imx219->regmap, IMX219_REG_TESTP_BLUE, + ctrl->val, &ret); + break; + case V4L2_CID_TEST_PATTERN_GREENB: + cci_write(imx219->regmap, IMX219_REG_TESTP_GREENB, + ctrl->val, &ret); + break; + default: + dev_info(&client->dev, + "ctrl(id:0x%x,val:0x%x) is not handled\n", + ctrl->id, ctrl->val); + ret = -EINVAL; + break; + } + + pm_runtime_put(&client->dev); + + return ret; +} + +static const struct v4l2_ctrl_ops imx219_ctrl_ops = { + .s_ctrl = imx219_set_ctrl, +}; + +static void imx219_update_pad_format(struct imx219 *imx219, + const struct imx219_mode *mode, + struct v4l2_mbus_framefmt *fmt, u32 code) +{ + /* Bayer order varies with flips */ + fmt->code = imx219_get_format_code(imx219, code); + fmt->width = mode->width; + fmt->height = mode->height; + fmt->field = V4L2_FIELD_NONE; + fmt->colorspace = V4L2_COLORSPACE_RAW; + fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE; + fmt->xfer_func = V4L2_XFER_FUNC_NONE; +} + +static int imx219_init_cfg(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state) +{ + struct imx219 *imx219 = to_imx219(sd); + struct v4l2_mbus_framefmt *format; + struct v4l2_rect *crop; + + /* Initialize the format. */ + format = v4l2_subdev_get_pad_format(sd, state, 0); + imx219_update_pad_format(imx219, &supported_modes[0], format, + MEDIA_BUS_FMT_SRGGB10_1X10); + + /* Initialize the crop rectangle. */ + crop = v4l2_subdev_get_pad_crop(sd, state, 0); + crop->top = IMX219_PIXEL_ARRAY_TOP; + crop->left = IMX219_PIXEL_ARRAY_LEFT; + crop->width = IMX219_PIXEL_ARRAY_WIDTH; + crop->height = IMX219_PIXEL_ARRAY_HEIGHT; + + return 0; +} + +static int imx219_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_mbus_code_enum *code) +{ + struct imx219 *imx219 = to_imx219(sd); + + if (code->index >= (ARRAY_SIZE(imx219_mbus_formats) / 4)) + return -EINVAL; + + code->code = imx219_get_format_code(imx219, imx219_mbus_formats[code->index * 4]); + + return 0; +} + +static int imx219_enum_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_frame_size_enum *fse) +{ + struct imx219 *imx219 = to_imx219(sd); + u32 code; + + if (fse->index >= ARRAY_SIZE(supported_modes)) + return -EINVAL; + + code = imx219_get_format_code(imx219, fse->code); + if (fse->code != code) + return -EINVAL; + + fse->min_width = supported_modes[fse->index].width; + fse->max_width = fse->min_width; + fse->min_height = supported_modes[fse->index].height; + fse->max_height = fse->min_height; + + return 0; +} + +static int imx219_set_pad_format(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *fmt) +{ + struct imx219 *imx219 = to_imx219(sd); + const struct imx219_mode *mode; + int exposure_max, exposure_def, hblank; + struct v4l2_mbus_framefmt *format; + struct v4l2_rect *crop; + + mode = v4l2_find_nearest_size(supported_modes, + ARRAY_SIZE(supported_modes), + width, height, + fmt->format.width, fmt->format.height); + + imx219_update_pad_format(imx219, mode, &fmt->format, fmt->format.code); + + format = v4l2_subdev_get_pad_format(sd, sd_state, 0); + crop = v4l2_subdev_get_pad_crop(sd, sd_state, 0); + + *format = fmt->format; + *crop = mode->crop; + + if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { + imx219->mode = mode; + /* Update limits and set FPS to default */ + __v4l2_ctrl_modify_range(imx219->vblank, IMX219_VBLANK_MIN, + IMX219_VTS_MAX - mode->height, 1, + mode->vts_def - mode->height); + __v4l2_ctrl_s_ctrl(imx219->vblank, + mode->vts_def - mode->height); + /* Update max exposure while meeting expected vblanking */ + exposure_max = mode->vts_def - 4; + exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ? + exposure_max : IMX219_EXPOSURE_DEFAULT; + __v4l2_ctrl_modify_range(imx219->exposure, + imx219->exposure->minimum, + exposure_max, imx219->exposure->step, + exposure_def); + /* + * Currently PPL is fixed to IMX219_PPL_DEFAULT, so hblank + * depends on mode->width only, and is not changeble in any + * way other than changing the mode. + */ + hblank = IMX219_PPL_DEFAULT - mode->width; + __v4l2_ctrl_modify_range(imx219->hblank, hblank, hblank, 1, + hblank); + } + + return 0; +} + +static int imx219_set_framefmt(struct imx219 *imx219, + const struct v4l2_mbus_framefmt *format) +{ + switch (format->code) { + case MEDIA_BUS_FMT_SRGGB8_1X8: + case MEDIA_BUS_FMT_SGRBG8_1X8: + case MEDIA_BUS_FMT_SGBRG8_1X8: + case MEDIA_BUS_FMT_SBGGR8_1X8: + return cci_multi_reg_write(imx219->regmap, raw8_framefmt_regs, + ARRAY_SIZE(raw8_framefmt_regs), NULL); + + case MEDIA_BUS_FMT_SRGGB10_1X10: + case MEDIA_BUS_FMT_SGRBG10_1X10: + case MEDIA_BUS_FMT_SGBRG10_1X10: + case MEDIA_BUS_FMT_SBGGR10_1X10: + return cci_multi_reg_write(imx219->regmap, raw10_framefmt_regs, + ARRAY_SIZE(raw10_framefmt_regs), NULL); + } + + return -EINVAL; +} + +static int imx219_set_binning(struct imx219 *imx219, + const struct v4l2_mbus_framefmt *format) +{ + if (!imx219->mode->binning) + return cci_write(imx219->regmap, IMX219_REG_BINNING_MODE, + IMX219_BINNING_NONE, NULL); + + switch (format->code) { + case MEDIA_BUS_FMT_SRGGB8_1X8: + case MEDIA_BUS_FMT_SGRBG8_1X8: + case MEDIA_BUS_FMT_SGBRG8_1X8: + case MEDIA_BUS_FMT_SBGGR8_1X8: + return cci_write(imx219->regmap, IMX219_REG_BINNING_MODE, + IMX219_BINNING_2X2_ANALOG, NULL); + + case MEDIA_BUS_FMT_SRGGB10_1X10: + case MEDIA_BUS_FMT_SGRBG10_1X10: + case MEDIA_BUS_FMT_SGBRG10_1X10: + case MEDIA_BUS_FMT_SBGGR10_1X10: + return cci_write(imx219->regmap, IMX219_REG_BINNING_MODE, + IMX219_BINNING_2X2, NULL); + } + + return -EINVAL; +} + +static int imx219_get_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_selection *sel) +{ + switch (sel->target) { + case V4L2_SEL_TGT_CROP: { + sel->r = *v4l2_subdev_get_pad_crop(sd, sd_state, 0); + return 0; + } + + case V4L2_SEL_TGT_NATIVE_SIZE: + sel->r.top = 0; + sel->r.left = 0; + sel->r.width = IMX219_NATIVE_WIDTH; + sel->r.height = IMX219_NATIVE_HEIGHT; + + return 0; + + case V4L2_SEL_TGT_CROP_DEFAULT: + case V4L2_SEL_TGT_CROP_BOUNDS: + sel->r.top = IMX219_PIXEL_ARRAY_TOP; + sel->r.left = IMX219_PIXEL_ARRAY_LEFT; + sel->r.width = IMX219_PIXEL_ARRAY_WIDTH; + sel->r.height = IMX219_PIXEL_ARRAY_HEIGHT; + + return 0; + } + + return -EINVAL; +} + +static int imx219_configure_lanes(struct imx219 *imx219) +{ + return cci_write(imx219->regmap, IMX219_REG_CSI_LANE_MODE, + imx219->lanes == 2 ? IMX219_CSI_2_LANE_MODE : + IMX219_CSI_4_LANE_MODE, NULL); +}; + +static int imx219_start_streaming(struct imx219 *imx219, + struct v4l2_subdev_state *state) +{ + struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd); + const struct v4l2_mbus_framefmt *format; + const struct imx219_reg_list *reg_list; + int ret; + + ret = pm_runtime_resume_and_get(&client->dev); + if (ret < 0) + return ret; + + /* Send all registers that are common to all modes */ + ret = cci_multi_reg_write(imx219->regmap, imx219_common_regs, + ARRAY_SIZE(imx219_common_regs), NULL); + if (ret) { + dev_err(&client->dev, "%s failed to send mfg header\n", __func__); + goto err_rpm_put; + } + + /* Configure two or four Lane mode */ + ret = imx219_configure_lanes(imx219); + if (ret) { + dev_err(&client->dev, "%s failed to configure lanes\n", __func__); + goto err_rpm_put; + } + + /* Apply default values of current mode */ + reg_list = &imx219->mode->reg_list; + ret = cci_multi_reg_write(imx219->regmap, reg_list->regs, + reg_list->num_of_regs, NULL); + if (ret) { + dev_err(&client->dev, "%s failed to set mode\n", __func__); + goto err_rpm_put; + } + + format = v4l2_subdev_get_pad_format(&imx219->sd, state, 0); + ret = imx219_set_framefmt(imx219, format); + if (ret) { + dev_err(&client->dev, "%s failed to set frame format: %d\n", + __func__, ret); + goto err_rpm_put; + } + + ret = imx219_set_binning(imx219, format); + if (ret) { + dev_err(&client->dev, "%s failed to set binning: %d\n", + __func__, ret); + goto err_rpm_put; + } + + /* Apply customized values from user */ + ret = __v4l2_ctrl_handler_setup(imx219->sd.ctrl_handler); + if (ret) + goto err_rpm_put; + + /* set stream on register */ + ret = cci_write(imx219->regmap, IMX219_REG_MODE_SELECT, + IMX219_MODE_STREAMING, NULL); + if (ret) + goto err_rpm_put; + + /* vflip and hflip cannot change during streaming */ + __v4l2_ctrl_grab(imx219->vflip, true); + __v4l2_ctrl_grab(imx219->hflip, true); + + return 0; + +err_rpm_put: + pm_runtime_put(&client->dev); + return ret; +} + +static void imx219_stop_streaming(struct imx219 *imx219) +{ + struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd); + int ret; + + /* set stream off register */ + ret = cci_write(imx219->regmap, IMX219_REG_MODE_SELECT, + IMX219_MODE_STANDBY, NULL); + if (ret) + dev_err(&client->dev, "%s failed to set stream\n", __func__); + + __v4l2_ctrl_grab(imx219->vflip, false); + __v4l2_ctrl_grab(imx219->hflip, false); + + pm_runtime_put(&client->dev); +} + +static int imx219_set_stream(struct v4l2_subdev *sd, int enable) +{ + struct imx219 *imx219 = to_imx219(sd); + struct v4l2_subdev_state *state; + int ret = 0; + + state = v4l2_subdev_lock_and_get_active_state(sd); + + if (imx219->streaming == enable) + goto unlock; + + if (enable) { + /* + * Apply default & customized values + * and then start streaming. + */ + ret = imx219_start_streaming(imx219, state); + if (ret) + goto unlock; + } else { + imx219_stop_streaming(imx219); + } + + imx219->streaming = enable; + +unlock: + v4l2_subdev_unlock_state(state); + return ret; +} + +/* Power/clock management functions */ +static int imx219_power_on(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct imx219 *imx219 = to_imx219(sd); + int ret; + + ret = regulator_bulk_enable(IMX219_NUM_SUPPLIES, + imx219->supplies); + if (ret) { + dev_err(dev, "%s: failed to enable regulators\n", + __func__); + return ret; + } + + ret = clk_prepare_enable(imx219->xclk); + if (ret) { + dev_err(dev, "%s: failed to enable clock\n", + __func__); + goto reg_off; + } + + gpiod_set_value_cansleep(imx219->reset_gpio, 1); + usleep_range(IMX219_XCLR_MIN_DELAY_US, + IMX219_XCLR_MIN_DELAY_US + IMX219_XCLR_DELAY_RANGE_US); + + return 0; + +reg_off: + regulator_bulk_disable(IMX219_NUM_SUPPLIES, imx219->supplies); + + return ret; +} + +static int imx219_power_off(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct imx219 *imx219 = to_imx219(sd); + + gpiod_set_value_cansleep(imx219->reset_gpio, 0); + regulator_bulk_disable(IMX219_NUM_SUPPLIES, imx219->supplies); + clk_disable_unprepare(imx219->xclk); + + return 0; +} + +static int __maybe_unused imx219_suspend(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct imx219 *imx219 = to_imx219(sd); + + if (imx219->streaming) + imx219_stop_streaming(imx219); + + return 0; +} + +static int __maybe_unused imx219_resume(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct imx219 *imx219 = to_imx219(sd); + struct v4l2_subdev_state *state; + int ret; + + if (imx219->streaming) { + state = v4l2_subdev_lock_and_get_active_state(sd); + ret = imx219_start_streaming(imx219, state); + v4l2_subdev_unlock_state(state); + if (ret) + goto error; + } + + return 0; + +error: + imx219_stop_streaming(imx219); + imx219->streaming = false; + + return ret; +} + +static int imx219_get_regulators(struct imx219 *imx219) +{ + struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd); + unsigned int i; + + for (i = 0; i < IMX219_NUM_SUPPLIES; i++) + imx219->supplies[i].supply = imx219_supply_name[i]; + + return devm_regulator_bulk_get(&client->dev, + IMX219_NUM_SUPPLIES, + imx219->supplies); +} + +/* Verify chip ID */ +static int imx219_identify_module(struct imx219 *imx219) +{ + struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd); + int ret; + u64 val; + + ret = cci_read(imx219->regmap, IMX219_REG_CHIP_ID, &val, NULL); + if (ret) { + dev_err(&client->dev, "failed to read chip id %x\n", + IMX219_CHIP_ID); + return ret; + } + + if (val != IMX219_CHIP_ID) { + dev_err(&client->dev, "chip id mismatch: %x!=%llx\n", + IMX219_CHIP_ID, val); + return -EIO; + } + + return 0; +} + +static const struct v4l2_subdev_core_ops imx219_core_ops = { + .subscribe_event = v4l2_ctrl_subdev_subscribe_event, + .unsubscribe_event = v4l2_event_subdev_unsubscribe, +}; + +static const struct v4l2_subdev_video_ops imx219_video_ops = { + .s_stream = imx219_set_stream, +}; + +static const struct v4l2_subdev_pad_ops imx219_pad_ops = { + .init_cfg = imx219_init_cfg, + .enum_mbus_code = imx219_enum_mbus_code, + .get_fmt = v4l2_subdev_get_fmt, + .set_fmt = imx219_set_pad_format, + .get_selection = imx219_get_selection, + .enum_frame_size = imx219_enum_frame_size, +}; + +static const struct v4l2_subdev_ops imx219_subdev_ops = { + .core = &imx219_core_ops, + .video = &imx219_video_ops, + .pad = &imx219_pad_ops, +}; + + +static unsigned long imx219_get_pixel_rate(struct imx219 *imx219) +{ + return (imx219->lanes == 2) ? IMX219_PIXEL_RATE : IMX219_PIXEL_RATE_4LANE; +} + +/* Initialize control handlers */ +static int imx219_init_controls(struct imx219 *imx219) +{ + struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd); + struct v4l2_ctrl_handler *ctrl_hdlr; + unsigned int height = imx219->mode->height; + struct v4l2_fwnode_device_properties props; + int exposure_max, exposure_def, hblank; + int i, ret; + + ctrl_hdlr = &imx219->ctrl_handler; + ret = v4l2_ctrl_handler_init(ctrl_hdlr, 12); + if (ret) + return ret; + + /* By default, PIXEL_RATE is read only */ + imx219->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, + V4L2_CID_PIXEL_RATE, + imx219_get_pixel_rate(imx219), + imx219_get_pixel_rate(imx219), 1, + imx219_get_pixel_rate(imx219)); + + imx219->link_freq = + v4l2_ctrl_new_int_menu(ctrl_hdlr, &imx219_ctrl_ops, + V4L2_CID_LINK_FREQ, + ARRAY_SIZE(imx219_link_freq_menu) - 1, 0, + (imx219->lanes == 2) ? imx219_link_freq_menu : + imx219_link_freq_4lane_menu); + if (imx219->link_freq) + imx219->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + /* Initial vblank/hblank/exposure parameters based on current mode */ + imx219->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, + V4L2_CID_VBLANK, IMX219_VBLANK_MIN, + IMX219_VTS_MAX - height, 1, + imx219->mode->vts_def - height); + hblank = IMX219_PPL_DEFAULT - imx219->mode->width; + imx219->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, + V4L2_CID_HBLANK, hblank, hblank, + 1, hblank); + if (imx219->hblank) + imx219->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; + exposure_max = imx219->mode->vts_def - 4; + exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ? + exposure_max : IMX219_EXPOSURE_DEFAULT; + imx219->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, + V4L2_CID_EXPOSURE, + IMX219_EXPOSURE_MIN, exposure_max, + IMX219_EXPOSURE_STEP, + exposure_def); + + v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, + IMX219_ANA_GAIN_MIN, IMX219_ANA_GAIN_MAX, + IMX219_ANA_GAIN_STEP, IMX219_ANA_GAIN_DEFAULT); + + v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, V4L2_CID_DIGITAL_GAIN, + IMX219_DGTL_GAIN_MIN, IMX219_DGTL_GAIN_MAX, + IMX219_DGTL_GAIN_STEP, IMX219_DGTL_GAIN_DEFAULT); + + imx219->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, + V4L2_CID_HFLIP, 0, 1, 1, 0); + if (imx219->hflip) + imx219->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; + + imx219->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 0); + if (imx219->vflip) + imx219->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; + + v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx219_ctrl_ops, + V4L2_CID_TEST_PATTERN, + ARRAY_SIZE(imx219_test_pattern_menu) - 1, + 0, 0, imx219_test_pattern_menu); + for (i = 0; i < 4; i++) { + /* + * The assumption is that + * V4L2_CID_TEST_PATTERN_GREENR == V4L2_CID_TEST_PATTERN_RED + 1 + * V4L2_CID_TEST_PATTERN_BLUE == V4L2_CID_TEST_PATTERN_RED + 2 + * V4L2_CID_TEST_PATTERN_GREENB == V4L2_CID_TEST_PATTERN_RED + 3 + */ + v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, + V4L2_CID_TEST_PATTERN_RED + i, + IMX219_TESTP_COLOUR_MIN, + IMX219_TESTP_COLOUR_MAX, + IMX219_TESTP_COLOUR_STEP, + IMX219_TESTP_COLOUR_MAX); + /* The "Solid color" pattern is white by default */ + } + + if (ctrl_hdlr->error) { + ret = ctrl_hdlr->error; + dev_err(&client->dev, "%s control init failed (%d)\n", + __func__, ret); + goto error; + } + + ret = v4l2_fwnode_device_parse(&client->dev, &props); + if (ret) + goto error; + + ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &imx219_ctrl_ops, + &props); + if (ret) + goto error; + + imx219->sd.ctrl_handler = ctrl_hdlr; + + return 0; + +error: + v4l2_ctrl_handler_free(ctrl_hdlr); + + return ret; +} + +static void imx219_free_controls(struct imx219 *imx219) +{ + v4l2_ctrl_handler_free(imx219->sd.ctrl_handler); +} + +static int imx219_check_hwcfg(struct device *dev, struct imx219 *imx219) +{ + struct fwnode_handle *endpoint; + struct v4l2_fwnode_endpoint ep_cfg = { + .bus_type = V4L2_MBUS_CSI2_DPHY + }; + int ret = -EINVAL; + + endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL); + if (!endpoint) { + dev_err(dev, "endpoint node not found\n"); + return -EINVAL; + } + + if (v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep_cfg)) { + dev_err(dev, "could not parse endpoint\n"); + goto error_out; + } + + /* Check the number of MIPI CSI2 data lanes */ + if (ep_cfg.bus.mipi_csi2.num_data_lanes != 2 && + ep_cfg.bus.mipi_csi2.num_data_lanes != 4) { + dev_err(dev, "only 2 or 4 data lanes are currently supported\n"); + goto error_out; + } + imx219->lanes = ep_cfg.bus.mipi_csi2.num_data_lanes; + + /* Check the link frequency set in device tree */ + if (!ep_cfg.nr_of_link_frequencies) { + dev_err(dev, "link-frequency property not found in DT\n"); + goto error_out; + } + + if (ep_cfg.nr_of_link_frequencies != 1 || + (ep_cfg.link_frequencies[0] != ((imx219->lanes == 2) ? + IMX219_DEFAULT_LINK_FREQ : IMX219_DEFAULT_LINK_FREQ_4LANE))) { + dev_err(dev, "Link frequency not supported: %lld\n", + ep_cfg.link_frequencies[0]); + goto error_out; + } + + ret = 0; + +error_out: + v4l2_fwnode_endpoint_free(&ep_cfg); + fwnode_handle_put(endpoint); + + return ret; +} + +static int imx219_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct imx219 *imx219; + int ret; + + imx219 = devm_kzalloc(&client->dev, sizeof(*imx219), GFP_KERNEL); + if (!imx219) + return -ENOMEM; + + v4l2_i2c_subdev_init(&imx219->sd, client, &imx219_subdev_ops); + + /* Check the hardware configuration in device tree */ + if (imx219_check_hwcfg(dev, imx219)) + return -EINVAL; + + imx219->regmap = devm_cci_regmap_init_i2c(client, 16); + if (IS_ERR(imx219->regmap)) { + ret = PTR_ERR(imx219->regmap); + dev_err(dev, "failed to initialize CCI: %d\n", ret); + return ret; + } + + /* Get system clock (xclk) */ + imx219->xclk = devm_clk_get(dev, NULL); + if (IS_ERR(imx219->xclk)) { + dev_err(dev, "failed to get xclk\n"); + return PTR_ERR(imx219->xclk); + } + + imx219->xclk_freq = clk_get_rate(imx219->xclk); + if (imx219->xclk_freq != IMX219_XCLK_FREQ) { + dev_err(dev, "xclk frequency not supported: %d Hz\n", + imx219->xclk_freq); + return -EINVAL; + } + + ret = imx219_get_regulators(imx219); + if (ret) { + dev_err(dev, "failed to get regulators\n"); + return ret; + } + + /* Request optional enable pin */ + imx219->reset_gpio = devm_gpiod_get_optional(dev, "reset", + GPIOD_OUT_HIGH); + + /* + * The sensor must be powered for imx219_identify_module() + * to be able to read the CHIP_ID register + */ + ret = imx219_power_on(dev); + if (ret) + return ret; + + ret = imx219_identify_module(imx219); + if (ret) + goto error_power_off; + + /* Set default mode to max resolution */ + imx219->mode = &supported_modes[0]; + + /* sensor doesn't enter LP-11 state upon power up until and unless + * streaming is started, so upon power up switch the modes to: + * streaming -> standby + */ + ret = cci_write(imx219->regmap, IMX219_REG_MODE_SELECT, + IMX219_MODE_STREAMING, NULL); + if (ret < 0) + goto error_power_off; + + usleep_range(100, 110); + + /* put sensor back to standby mode */ + ret = cci_write(imx219->regmap, IMX219_REG_MODE_SELECT, + IMX219_MODE_STANDBY, NULL); + if (ret < 0) + goto error_power_off; + + usleep_range(100, 110); + + ret = imx219_init_controls(imx219); + if (ret) + goto error_power_off; + + /* Initialize subdev */ + imx219->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | + V4L2_SUBDEV_FL_HAS_EVENTS; + imx219->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; + + /* Initialize source pad */ + imx219->pad.flags = MEDIA_PAD_FL_SOURCE; + + ret = media_entity_pads_init(&imx219->sd.entity, 1, &imx219->pad); + if (ret) { + dev_err(dev, "failed to init entity pads: %d\n", ret); + goto error_handler_free; + } + + imx219->sd.state_lock = imx219->ctrl_handler.lock; + ret = v4l2_subdev_init_finalize(&imx219->sd); + if (ret < 0) { + dev_err(dev, "subdev init error: %d\n", ret); + goto error_media_entity; + } + + ret = v4l2_async_register_subdev_sensor(&imx219->sd); + if (ret < 0) { + dev_err(dev, "failed to register sensor sub-device: %d\n", ret); + goto error_subdev_cleanup; + } + + /* Enable runtime PM and turn off the device */ + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_idle(dev); + + return 0; + +error_subdev_cleanup: + v4l2_subdev_cleanup(&imx219->sd); + +error_media_entity: + media_entity_cleanup(&imx219->sd.entity); + +error_handler_free: + imx219_free_controls(imx219); + +error_power_off: + imx219_power_off(dev); + + return ret; +} + +static void imx219_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct imx219 *imx219 = to_imx219(sd); + + v4l2_async_unregister_subdev(sd); + v4l2_subdev_cleanup(sd); + media_entity_cleanup(&sd->entity); + imx219_free_controls(imx219); + + pm_runtime_disable(&client->dev); + if (!pm_runtime_status_suspended(&client->dev)) + imx219_power_off(&client->dev); + pm_runtime_set_suspended(&client->dev); +} + +static const struct of_device_id imx219_dt_ids[] = { + { .compatible = "sony,imx219" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, imx219_dt_ids); + +static const struct dev_pm_ops imx219_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(imx219_suspend, imx219_resume) + SET_RUNTIME_PM_OPS(imx219_power_off, imx219_power_on, NULL) +}; + +static struct i2c_driver imx219_i2c_driver = { + .driver = { + .name = "imx219", + .of_match_table = imx219_dt_ids, + .pm = &imx219_pm_ops, + }, + .probe = imx219_probe, + .remove = imx219_remove, +}; + +module_i2c_driver(imx219_i2c_driver); + +MODULE_AUTHOR("Dave Stevenson <dave.stevenson@raspberrypi.com"); +MODULE_DESCRIPTION("Sony IMX219 sensor driver"); +MODULE_LICENSE("GPL v2"); |