[PATCH v2 2/3] media: i2c: Add IMX290 CMOS image sensor driver

From: Manivannan Sadhasivam
Date: Tue Aug 06 2019 - 09:10:03 EST

Add driver for Sony IMX290 CMOS image sensor driver. The driver only
supports I2C interface for programming and MIPI CSI-2 for sensor output.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
---
drivers/media/i2c/Kconfig | 11 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/imx290.c | 845 +++++++++++++++++++++++++++++++++++++
3 files changed, 857 insertions(+)
create mode 100644 drivers/media/i2c/imx290.c

diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index cb8db944aa41..256edd289abe 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -594,6 +594,17 @@ config VIDEO_IMX274
This is a V4L2 sensor driver for the Sony IMX274
CMOS image sensor.

+config VIDEO_IMX290
+ tristate "Sony IMX290 sensor support"
+ depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+ depends on MEDIA_CAMERA_SUPPORT
+ help
+ This is a Video4Linux2 sensor driver for the Sony
+ IMX290 camera sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called imx290.
+
config VIDEO_IMX319
tristate "Sony IMX319 sensor support"
depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index d8ad9dad495d..490e59070407 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -111,6 +111,7 @@ obj-$(CONFIG_VIDEO_TC358743) += tc358743.o
obj-$(CONFIG_VIDEO_IMX214) += imx214.o
obj-$(CONFIG_VIDEO_IMX258) += imx258.o
obj-$(CONFIG_VIDEO_IMX274) += imx274.o
+obj-$(CONFIG_VIDEO_IMX290) += imx290.o
obj-$(CONFIG_VIDEO_IMX319) += imx319.o
obj-$(CONFIG_VIDEO_IMX355) += imx355.o
obj-$(CONFIG_VIDEO_ST_MIPID02) += st-mipid02.o
diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
new file mode 100644
index 000000000000..8c50fbd51ca5
--- /dev/null
+++ b/drivers/media/i2c/imx290.c
@@ -0,0 +1,845 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Sony IMX290 CMOS Image Sensor Driver
+ *
+ * Copyright (C) 2019 FRAMOS GmbH.
+ *
+ * Copyright (C) 2019 Linaro Ltd.
+ * Author: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <media/media-entity.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#define IMX290_STANDBY 0x3000
+#define IMX290_REGHOLD 0x3001
+#define IMX290_XMSTA 0x3002
+#define IMX290_GAIN 0x3014
+
+static const char * const imx290_supply_name[] = {
+ "vdda",
+ "vddd",
+ "vdddo",
+};
+
+#define IMX290_NUM_SUPPLIES ARRAY_SIZE(imx290_supply_name)
+
+struct imx290_regval {
+ u16 reg;
+ u8 val;
+};
+
+struct imx290_mode {
+ u32 width;
+ u32 height;
+ u32 pixel_rate;
+ u32 link_freq_index;
+
+ const struct imx290_regval *data;
+ u32 data_size;
+};
+
+struct imx290 {
+ struct device *dev;
+ struct clk *xclk;
+ struct regmap *regmap;
+
+ struct v4l2_subdev sd;
+ struct v4l2_fwnode_endpoint ep;
+ struct media_pad pad;
+ struct v4l2_mbus_framefmt current_format;
+ const struct imx290_mode *current_mode;
+
+ struct regulator_bulk_data supplies[IMX290_NUM_SUPPLIES];
+ struct gpio_desc *rst_gpio;
+
+ struct v4l2_ctrl_handler ctrls;
+ struct v4l2_ctrl *link_freq;
+ struct v4l2_ctrl *pixel_rate;
+
+ struct mutex lock;
+};
+
+struct imx290_pixfmt {
+ u32 code;
+ u32 colorspace;
+};
+
+static const struct imx290_pixfmt imx290_formats[] = {
+ { MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_COLORSPACE_SRGB, },
+};
+
+static struct regmap_config imx290_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 8,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static const struct imx290_regval imx290_global_init_settings[] = {
+ { 0x3007, 0x00 },
+ { 0x3009, 0x00 },
+ { 0x3018, 0x65 },
+ { 0x3019, 0x04 },
+ { 0x301a, 0x00 },
+ { 0x3443, 0x03 },
+ { 0x3444, 0x20 },
+ { 0x3445, 0x25 },
+ { 0x3407, 0x03 },
+ { 0x303a, 0x0c },
+ { 0x3040, 0x00 },
+ { 0x3041, 0x00 },
+ { 0x303c, 0x00 },
+ { 0x303d, 0x00 },
+ { 0x3042, 0x9c },
+ { 0x3043, 0x07 },
+ { 0x303e, 0x49 },
+ { 0x303f, 0x04 },
+ { 0x304b, 0x0a },
+ { 0x300f, 0x00 },
+ { 0x3010, 0x21 },
+ { 0x3012, 0x64 },
+ { 0x3016, 0x09 },
+ { 0x3070, 0x02 },
+ { 0x3071, 0x11 },
+ { 0x309b, 0x10 },
+ { 0x309c, 0x22 },
+ { 0x30a2, 0x02 },
+ { 0x30a6, 0x20 },
+ { 0x30a8, 0x20 },
+ { 0x30aa, 0x20 },
+ { 0x30ac, 0x20 },
+ { 0x30b0, 0x43 },
+ { 0x3119, 0x9e },
+ { 0x311c, 0x1e },
+ { 0x311e, 0x08 },
+ { 0x3128, 0x05 },
+ { 0x313d, 0x83 },
+ { 0x3150, 0x03 },
+ { 0x317e, 0x00 },
+ { 0x32b8, 0x50 },
+ { 0x32b9, 0x10 },
+ { 0x32ba, 0x00 },
+ { 0x32bb, 0x04 },
+ { 0x32c8, 0x50 },
+ { 0x32c9, 0x10 },
+ { 0x32ca, 0x00 },
+ { 0x32cb, 0x04 },
+ { 0x332c, 0xd3 },
+ { 0x332d, 0x10 },
+ { 0x332e, 0x0d },
+ { 0x3358, 0x06 },
+ { 0x3359, 0xe1 },
+ { 0x335a, 0x11 },
+ { 0x3360, 0x1e },
+ { 0x3361, 0x61 },
+ { 0x3362, 0x10 },
+ { 0x33b0, 0x50 },
+ { 0x33b2, 0x1a },
+ { 0x33b3, 0x04 },
+};
+
+static const struct imx290_regval imx290_1080p_settings[] = {
+ /* mode settings */
+ { 0x3007, 0x00 },
+ { 0x303a, 0x0c },
+ { 0x3414, 0x0a },
+ { 0x3472, 0x80 },
+ { 0x3473, 0x07 },
+ { 0x3418, 0x38 },
+ { 0x3419, 0x04 },
+ { 0x3012, 0x64 },
+ { 0x3013, 0x00 },
+ { 0x305c, 0x18 },
+ { 0x305d, 0x03 },
+ { 0x305e, 0x20 },
+ { 0x305f, 0x01 },
+ { 0x315e, 0x1a },
+ { 0x3164, 0x1a },
+ { 0x3480, 0x49 },
+ /* data rate settings */
+ { 0x3009, 0x01 },
+ { 0x3405, 0x10 },
+ { 0x3446, 0x57 },
+ { 0x3447, 0x00 },
+ { 0x3448, 0x37 },
+ { 0x3449, 0x00 },
+ { 0x344a, 0x1f },
+ { 0x344b, 0x00 },
+ { 0x344c, 0x1f },
+ { 0x344d, 0x00 },
+ { 0x344e, 0x1f },
+ { 0x344f, 0x00 },
+ { 0x3450, 0x77 },
+ { 0x3451, 0x00 },
+ { 0x3452, 0x1f },
+ { 0x3453, 0x00 },
+ { 0x3454, 0x17 },
+ { 0x3455, 0x00 },
+ { 0x301c, 0x98 },
+ { 0x301d, 0x08 },
+};
+
+static const struct imx290_regval imx290_720p_settings[] = {
+ /* mode settings */
+ { 0x3007, 0x10 },
+ { 0x303a, 0x06 },
+ { 0x3414, 0x04 },
+ { 0x3472, 0x00 },
+ { 0x3473, 0x05 },
+ { 0x3418, 0xd0 },
+ { 0x3419, 0x02 },
+ { 0x3012, 0x64 },
+ { 0x3013, 0x00 },
+ { 0x305c, 0x20 },
+ { 0x305d, 0x00 },
+ { 0x305e, 0x20 },
+ { 0x305f, 0x01 },
+ { 0x315e, 0x1a },
+ { 0x3164, 0x1a },
+ { 0x3480, 0x49 },
+ /* data rate settings */
+ { 0x3009, 0x01 },
+ { 0x3405, 0x10 },
+ { 0x3446, 0x4f },
+ { 0x3447, 0x00 },
+ { 0x3448, 0x2f },
+ { 0x3449, 0x00 },
+ { 0x344a, 0x17 },
+ { 0x344b, 0x00 },
+ { 0x344c, 0x17 },
+ { 0x344d, 0x00 },
+ { 0x344e, 0x17 },
+ { 0x344f, 0x00 },
+ { 0x3450, 0x57 },
+ { 0x3451, 0x00 },
+ { 0x3452, 0x17 },
+ { 0x3453, 0x00 },
+ { 0x3454, 0x17 },
+ { 0x3455, 0x00 },
+ { 0x301c, 0xe4 },
+ { 0x301d, 0x0c },
+};
+
+static const struct imx290_regval imx290_10bit_settings[] = {
+ { 0x3005, 0x00},
+ { 0x3046, 0x00},
+ { 0x3129, 0x1d},
+ { 0x317c, 0x12},
+ { 0x31ec, 0x37},
+ { 0x3441, 0x0a},
+ { 0x3442, 0x0a},
+ { 0x300a, 0x3c},
+ { 0x300b, 0x00},
+};
+
+/* supported link frequencies */
+static const s64 imx290_link_freq[] = {
+ 445500000,
+};
+
+/* Mode configs */
+static const struct imx290_mode imx290_modes[] = {
+ {
+ .width = 1920,
+ .height = 1080,
+ .data = imx290_1080p_settings,
+ .data_size = ARRAY_SIZE(imx290_1080p_settings),
+ .pixel_rate = 178200000,
+ .link_freq_index = 0,
+ },
+ {
+ .width = 1280,
+ .height = 720,
+ .data = imx290_720p_settings,
+ .data_size = ARRAY_SIZE(imx290_720p_settings),
+ .pixel_rate = 178200000,
+ .link_freq_index = 0,
+ },
+};
+
+static inline struct imx290 *to_imx290(struct v4l2_subdev *_sd)
+{
+ return container_of(_sd, struct imx290, sd);
+}
+
+static inline int imx290_read_reg(struct imx290 *imx290, u16 addr, u8 *value)
+{
+ u32 regval;
+ int ret;
+
+ ret = regmap_read(imx290->regmap, addr, &regval);
+ if (ret) {
+ dev_err(imx290->dev, "I2C read failed for addr: %x\n", addr);
+ return ret;
+ }
+
+ *value = regval & 0xFF;
+
+ return 0;
+}
+
+static int imx290_write_reg(struct imx290 *imx290, u16 addr, u8 value)
+{
+ int ret;
+
+ ret = regmap_write(imx290->regmap, addr, value);
+ if (ret) {
+ dev_err(imx290->dev, "I2C write failed for addr: %x\n", addr);
+ return ret;
+ }
+
+ return ret;
+}
+
+static int imx290_set_register_array(struct imx290 *imx290,
+ const struct imx290_regval *settings,
+ unsigned int num_settings)
+{
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < num_settings; ++i, ++settings) {
+ ret = imx290_write_reg(imx290, settings->reg, settings->val);
+ if (ret < 0)
+ return ret;
+
+ /* Settle time is 10ms for all registers */
+ msleep(10);
+ }
+
+ return 0;
+}
+
+static int imx290_write_buffered_reg(struct imx290 *imx290, u16 address_low,
+ u8 nr_regs, u32 value)
+{
+ int ret, i;
+ u8 val = 0;
+
+ ret = imx290_write_reg(imx290, IMX290_REGHOLD, 0x01);
+ if (ret) {
+ dev_err(imx290->dev, "Error setting hold register\n");
+ return ret;
+ }
+
+ for (i = 0; i < nr_regs; i++) {
+ imx290_read_reg(imx290, address_low + i, &val);
+ ret = imx290_write_reg(imx290, address_low + i,
+ (u8)(value >> (i * 8)));
+ if (ret) {
+ dev_err(imx290->dev, "Error writing buffered registers\n");
+ return ret;
+ }
+ imx290_read_reg(imx290, address_low + i, &val);
+ }
+
+ ret = imx290_write_reg(imx290, IMX290_REGHOLD, 0x00);
+ if (ret) {
+ dev_err(imx290->dev, "Error setting hold register\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+static int imx290_set_gain(struct imx290 *imx290, u32 value)
+{
+ int ret;
+
+ u32 adjusted_value = (value * 10) / 3;
+
+ ret = imx290_write_buffered_reg(imx290, IMX290_GAIN, 1, adjusted_value);
+ if (ret)
+ dev_err(imx290->dev, "Unable to write gain\n");
+
+ return ret;
+}
+
+static int imx290_set_power_on(struct imx290 *imx290)
+{
+ int ret;
+
+ ret = clk_prepare_enable(imx290->xclk);
+ if (ret) {
+ dev_err(imx290->dev, "Failed to enable clock\n");
+ return ret;
+ }
+
+ ret = regulator_bulk_enable(IMX290_NUM_SUPPLIES,
+ imx290->supplies);
+ if (ret) {
+ dev_err(imx290->dev, "Failed to enable regulators\n");
+ goto xclk_off;
+ }
+
+ usleep_range(1, 2);
+ gpiod_set_value_cansleep(imx290->rst_gpio, 1);
+ usleep_range(30000, 31000);
+
+ return 0;
+
+xclk_off:
+ clk_disable_unprepare(imx290->xclk);
+ return ret;
+}
+
+/* Stop streaming */
+static int imx290_stop_streaming(struct imx290 *imx290)
+{
+ int ret;
+
+ ret = imx290_write_reg(imx290, IMX290_STANDBY, 0x01);
+ if (ret < 0)
+ return ret;
+
+ msleep(30);
+
+ return imx290_write_reg(imx290, IMX290_XMSTA, 0x01);
+}
+
+static void imx290_set_power_off(struct imx290 *imx290)
+{
+ clk_disable_unprepare(imx290->xclk);
+ gpiod_set_value_cansleep(imx290->rst_gpio, 0);
+ regulator_bulk_disable(IMX290_NUM_SUPPLIES, imx290->supplies);
+}
+
+static int imx290_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct imx290 *imx290 = to_imx290(sd);
+ int ret = 0;
+
+ mutex_lock(&imx290->lock);
+
+ if (on) {
+ ret = imx290_set_power_on(imx290);
+ if (ret < 0)
+ goto exit;
+
+ ret = imx290_set_register_array(imx290,
+ imx290_global_init_settings,
+ ARRAY_SIZE(imx290_global_init_settings));
+ if (ret < 0) {
+ dev_err(imx290->dev,
+ "Could not set init registers\n");
+ imx290_set_power_off(imx290);
+ goto exit;
+ }
+
+ imx290_stop_streaming(imx290);
+ } else {
+ imx290_set_power_off(imx290);
+ }
+
+exit:
+ mutex_unlock(&imx290->lock);
+
+ return ret;
+}
+
+static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct imx290 *imx290 = container_of(ctrl->handler,
+ struct imx290, ctrls);
+ int ret = 0;
+
+ mutex_lock(&imx290->lock);
+
+ switch (ctrl->id) {
+ case V4L2_CID_GAIN:
+ ret = imx290_set_gain(imx290, ctrl->val);
+ break;
+ default:
+ dev_info(imx290->dev, "ctrl(id:0x%x,val:0x%x) is not handled",
+ ctrl->id, ctrl->val);
+ break;
+ }
+
+ mutex_unlock(&imx290->lock);
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops imx290_ctrl_ops = {
+ .s_ctrl = imx290_set_ctrl,
+};
+
+static int imx290_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index >= ARRAY_SIZE(imx290_formats))
+ return -EINVAL;
+
+ code->code = imx290_formats[code->index].code;
+
+ return 0;
+}
+
+static int imx290_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct imx290 *imx290 = to_imx290(sd);
+ struct v4l2_mbus_framefmt *framefmt;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+ framefmt = v4l2_subdev_get_try_format(&imx290->sd, cfg,
+ fmt->pad);
+ else
+ framefmt = &imx290->current_format;
+
+ fmt->format = *framefmt;
+
+ return 0;
+}
+
+static int imx290_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct imx290 *imx290 = to_imx290(sd);
+ const struct imx290_mode *mode;
+ struct v4l2_mbus_framefmt *format;
+ int i, ret = 0;
+
+ mode = v4l2_find_nearest_size(imx290_modes,
+ ARRAY_SIZE(imx290_modes),
+ width, height,
+ fmt->format.width, fmt->format.height);
+
+ fmt->format.width = mode->width;
+ fmt->format.height = mode->height;
+
+ for (i = 0; i < ARRAY_SIZE(imx290_formats); i++)
+ if (imx290_formats[i].code == fmt->format.code)
+ break;
+
+ if (i >= ARRAY_SIZE(imx290_formats))
+ i = 0;
+
+ fmt->format.code = imx290_formats[i].code;
+ fmt->format.colorspace = imx290_formats[i].colorspace;
+ fmt->format.field = V4L2_FIELD_NONE;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ format = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
+ } else {
+ format = &imx290->current_format;
+ __v4l2_ctrl_s_ctrl(imx290->link_freq, mode->link_freq_index);
+ __v4l2_ctrl_s_ctrl_int64(imx290->pixel_rate, mode->pixel_rate);
+
+ imx290->current_mode = mode;
+ }
+
+ *format = fmt->format;
+
+ return ret;
+}
+
+static int imx290_entity_init_cfg(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg)
+{
+ struct v4l2_subdev_format fmt = { 0 };
+
+ fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
+ fmt.format.width = 1920;
+ fmt.format.height = 1080;
+
+ imx290_set_fmt(subdev, cfg, &fmt);
+
+ return 0;
+}
+
+static int imx290_write_current_format(struct imx290 *imx290,
+ struct v4l2_mbus_framefmt *format)
+{
+ int ret;
+
+ switch (format->code) {
+ case MEDIA_BUS_FMT_SRGGB10_1X10:
+ ret = imx290_set_register_array(imx290, imx290_10bit_settings,
+ ARRAY_SIZE(imx290_10bit_settings));
+ if (ret < 0) {
+ dev_err(imx290->dev, "Could not set format registers\n");
+ return ret;
+ }
+ break;
+ default:
+ dev_err(imx290->dev, "Unknown pixel format\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* Start streaming */
+static int imx290_start_streaming(struct imx290 *imx290)
+{
+ int ret;
+
+ /* Set current frame format */
+ ret = imx290_write_current_format(imx290, &imx290->current_format);
+ if (ret < 0) {
+ dev_err(imx290->dev, "Could not set frame format\n");
+ return ret;
+ }
+
+ /* Apply default values of current mode */
+ ret = imx290_set_register_array(imx290, imx290->current_mode->data,
+ imx290->current_mode->data_size);
+ if (ret < 0) {
+ dev_err(imx290->dev, "Could not set current mode\n");
+ return ret;
+ }
+
+ /* Apply customized values from user */
+ ret = v4l2_ctrl_handler_setup(imx290->sd.ctrl_handler);
+ if (ret) {
+ dev_err(imx290->dev, "Could not sync v4l2 controls\n");
+ return ret;
+ }
+
+ ret = imx290_write_reg(imx290, IMX290_STANDBY, 0x00);
+ if (ret < 0)
+ return ret;
+
+ msleep(30);
+
+ /* Start streaming */
+ return imx290_write_reg(imx290, IMX290_XMSTA, 0x00);
+}
+
+static int imx290_set_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct imx290 *imx290 = to_imx290(sd);
+ int ret = 0;
+
+ if (enable)
+ ret = imx290_start_streaming(imx290);
+ else
+ imx290_stop_streaming(imx290);
+
+ return ret;
+}
+
+static int imx290_get_regulators(struct device *dev, struct imx290 *imx290)
+{
+ unsigned int i;
+
+ for (i = 0; i < IMX290_NUM_SUPPLIES; i++)
+ imx290->supplies[i].supply = imx290_supply_name[i];
+
+ return devm_regulator_bulk_get(dev, IMX290_NUM_SUPPLIES,
+ imx290->supplies);
+}
+
+static const struct v4l2_subdev_core_ops imx290_subdev_core_ops = {
+ .s_power = imx290_s_power,
+};
+
+static const struct v4l2_subdev_video_ops imx290_video_ops = {
+ .s_stream = imx290_set_stream,
+};
+
+static const struct v4l2_subdev_pad_ops imx290_pad_ops = {
+ .init_cfg = imx290_entity_init_cfg,
+ .enum_mbus_code = imx290_enum_mbus_code,
+ .get_fmt = imx290_get_fmt,
+ .set_fmt = imx290_set_fmt,
+};
+
+static const struct v4l2_subdev_ops imx290_subdev_ops = {
+ .core = &imx290_subdev_core_ops,
+ .video = &imx290_video_ops,
+ .pad = &imx290_pad_ops,
+};
+
+static const struct media_entity_operations imx290_subdev_entity_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+static int imx290_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct fwnode_handle *endpoint;
+ struct imx290 *imx290;
+ u32 xclk_freq;
+ int ret;
+
+ imx290 = devm_kzalloc(dev, sizeof(*imx290), GFP_KERNEL);
+ if (!imx290)
+ return -ENOMEM;
+
+ imx290->dev = dev;
+ imx290->regmap = devm_regmap_init_i2c(client, &imx290_regmap_config);
+ if (IS_ERR(imx290->regmap)) {
+ dev_err(dev, "Unable to initialize I2C\n");
+ return -ENODEV;
+ }
+
+ endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
+ if (!endpoint) {
+ dev_err(dev, "Endpoint node not found\n");
+ return -EINVAL;
+ }
+
+ ret = v4l2_fwnode_endpoint_parse(endpoint, &imx290->ep);
+ fwnode_handle_put(endpoint);
+ if (ret < 0) {
+ dev_err(dev, "Parsing endpoint node failed\n");
+ return ret;
+ }
+
+ /* Only CSI2 is supported for now */
+ if (imx290->ep.bus_type != V4L2_MBUS_CSI2_DPHY) {
+ dev_err(dev, "Unsupported bus type, should be CSI2\n");
+ return -EINVAL;
+ }
+
+ /* Set default mode to max resolution */
+ imx290->current_mode = &imx290_modes[0];
+
+ /* get system clock (xclk) */
+ imx290->xclk = devm_clk_get(dev, "xclk");
+ if (IS_ERR(imx290->xclk)) {
+ dev_err(dev, "Could not get xclk");
+ return PTR_ERR(imx290->xclk);
+ }
+
+ ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq);
+ if (ret) {
+ dev_err(dev, "Could not get xclk frequency\n");
+ return ret;
+ }
+
+ /* external clock must be 37.125 MHz */
+ if (xclk_freq != 37125000) {
+ dev_err(dev, "External clock frequency %u is not supported\n",
+ xclk_freq);
+ return -EINVAL;
+ }
+
+ ret = clk_set_rate(imx290->xclk, xclk_freq);
+ if (ret) {
+ dev_err(dev, "Could not set xclk frequency\n");
+ return ret;
+ }
+
+ ret = imx290_get_regulators(dev, imx290);
+ if (ret < 0) {
+ dev_err(dev, "Cannot get regulators\n");
+ return ret;
+ }
+
+ imx290->rst_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_ASIS);
+ if (IS_ERR(imx290->rst_gpio)) {
+ dev_err(dev, "Cannot get reset gpio\n");
+ return PTR_ERR(imx290->rst_gpio);
+ }
+
+ mutex_init(&imx290->lock);
+
+ v4l2_ctrl_handler_init(&imx290->ctrls, 3);
+
+ v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
+ V4L2_CID_GAIN, 0, 72, 1, 0);
+ imx290->link_freq = v4l2_ctrl_new_int_menu(&imx290->ctrls,
+ &imx290_ctrl_ops,
+ V4L2_CID_LINK_FREQ,
+ ARRAY_SIZE(imx290_link_freq) - 1,
+ 0, imx290_link_freq);
+ if (imx290->link_freq)
+ imx290->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ imx290->pixel_rate = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
+ V4L2_CID_PIXEL_RATE, 1,
+ INT_MAX, 1,
+ imx290_modes[0].pixel_rate);
+
+ imx290->sd.ctrl_handler = &imx290->ctrls;
+
+ if (imx290->ctrls.error) {
+ dev_err(dev, "Control initialization error %d\n",
+ imx290->ctrls.error);
+ ret = imx290->ctrls.error;
+ goto free_ctrl;
+ }
+
+ v4l2_i2c_subdev_init(&imx290->sd, client, &imx290_subdev_ops);
+ imx290->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ imx290->sd.dev = &client->dev;
+ imx290->sd.entity.ops = &imx290_subdev_entity_ops;
+ imx290->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+
+ imx290->pad.flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_pads_init(&imx290->sd.entity, 1, &imx290->pad);
+ if (ret < 0) {
+ dev_err(dev, "Could not register media entity\n");
+ goto free_ctrl;
+ }
+
+ ret = v4l2_async_register_subdev(&imx290->sd);
+ if (ret < 0) {
+ dev_err(dev, "Could not register v4l2 device\n");
+ goto free_entity;
+ }
+
+ return 0;
+
+free_entity:
+ media_entity_cleanup(&imx290->sd.entity);
+free_ctrl:
+ v4l2_ctrl_handler_free(&imx290->ctrls);
+ mutex_destroy(&imx290->lock);
+
+ return ret;
+}
+
+static int imx290_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct imx290 *imx290 = to_imx290(sd);
+
+ v4l2_async_unregister_subdev(sd);
+ media_entity_cleanup(&sd->entity);
+ v4l2_ctrl_handler_free(sd->ctrl_handler);
+
+ imx290_set_power_off(imx290);
+ mutex_destroy(&imx290->lock);
+
+ return 0;
+}
+
+static const struct of_device_id imx290_of_match[] = {
+ { .compatible = "sony,imx290" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx290_of_match);
+
+static struct i2c_driver imx290_i2c_driver = {
+ .probe = imx290_probe,
+ .remove = imx290_remove,
+ .driver = {
+ .name = "imx290",
+ .of_match_table = of_match_ptr(imx290_of_match),
+ },
+};
+
+module_i2c_driver(imx290_i2c_driver);
+
+MODULE_DESCRIPTION("Sony IMX290 CMOS Image Sensor Driver");
+MODULE_AUTHOR("FRAMOS GmbH");
+MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
--
2.17.1