On 05/12/2016 04:59 PM, Todor Tomov wrote:
> The ov5645 sensor from Omnivision supports up to 2592x1944
> and CSI2 interface.
>
> The driver adds support for the following modes:
> - 1280x960
> - 1920x1080
> - 2592x1944
>
> Output format is packed 8bit UYVY.
>
> Signed-off-by: Todor Tomov <todor.to...@linaro.org>
> ---
> .../devicetree/bindings/media/i2c/ov5645.txt | 54 +
> drivers/media/i2c/Kconfig | 11 +
> drivers/media/i2c/Makefile | 1 +
> drivers/media/i2c/ov5645.c | 1344
> ++++++++++++++++++++
> 4 files changed, 1410 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/i2c/ov5645.txt
> create mode 100644 drivers/media/i2c/ov5645.c
>
> +static int ov5645_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
> +{
> + return ov5645_s_power(subdev, true);
> +}
> +
> +static int ov5645_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh
> *fh)
> +{
> + return ov5645_s_power(subdev, false);
> +}
This won't work: you can open the v4l-subdev node multiple times, so if I open
it twice then
the next close will power down the chip and the last remaining open is in a bad
state.
> +
> +static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable)
> +{
> + struct ov5645 *ov5645 = to_ov5645(subdev);
> + int ret;
> +
> + dev_dbg(ov5645->dev, "%s: enable = %d\n", __func__, enable);
> +
> + if (enable) {
> + ret = ov5645_change_mode(ov5645, ov5645->current_mode);
> + if (ret < 0) {
> + dev_err(ov5645->dev, "could not set mode %d\n",
> + ov5645->current_mode);
> + return ret;
> + }
> + ret = v4l2_ctrl_handler_setup(&ov5645->ctrls);
> + if (ret < 0) {
> + dev_err(ov5645->dev, "could not sync v4l2 controls\n");
> + return ret;
> + }
> + ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
> + OV5645_SYSTEM_CTRL0_START);
> + } else {
> + ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
> + OV5645_SYSTEM_CTRL0_STOP);
> + }
> +
> + return 0;
> +}
It might make more sense to power up on s_stream(true) or off on
s_stream(false).
> +
> +static struct v4l2_subdev_core_ops ov5645_core_ops = {
> + .s_power = ov5645_s_power,
> +};
> +
> +static struct v4l2_subdev_video_ops ov5645_video_ops = {
> + .s_stream = ov5645_s_stream,
> +};
> +
> +static struct v4l2_subdev_pad_ops ov5645_subdev_pad_ops = {
> + .enum_mbus_code = ov5645_enum_mbus_code,
> + .enum_frame_size = ov5645_enum_frame_size,
> + .get_fmt = ov5645_get_format,
> + .set_fmt = ov5645_set_format,
> + .get_selection = ov5645_get_selection,
> +};
> +
> +static struct v4l2_subdev_ops ov5645_subdev_ops = {
> + .core = &ov5645_core_ops,
> + .video = &ov5645_video_ops,
> + .pad = &ov5645_subdev_pad_ops,
> +};
> +
> +static const struct v4l2_subdev_internal_ops ov5645_subdev_internal_ops = {
> + .registered = ov5645_registered,
> + .open = ov5645_open,
> + .close = ov5645_close,
> +};
> +
> +static int ov5645_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct device *dev = &client->dev;
> + struct device_node *endpoint;
> + struct ov5645 *ov5645;
> + int ret = 0;
> +
> + ov5645 = devm_kzalloc(dev, sizeof(struct ov5645), GFP_KERNEL);
> + if (!ov5645)
> + return -ENOMEM;
> +
> + ov5645->i2c_client = client;
> + ov5645->dev = dev;
> + ov5645->fmt.code = MEDIA_BUS_FMT_UYVY8_2X8;
> + ov5645->fmt.width = 1920;
> + ov5645->fmt.height = 1080;
> + ov5645->fmt.field = V4L2_FIELD_NONE;
You need to set the colorspace as well. Probably _SRGB or _RAW.
> + ov5645->current_mode = ov5645_mode_1080p_1920_1080;
> +
> + endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
> + if (!endpoint) {
> + dev_err(dev, "endpoint node not found\n");
> + return -EINVAL;
> + }
> +
> + v4l2_of_parse_endpoint(endpoint, &ov5645->ep);
> + if (ov5645->ep.bus_type != V4L2_MBUS_CSI2) {
> + dev_err(dev, "invalid bus type, must be CSI2\n");
> + of_node_put(endpoint);
> + return -EINVAL;
> + }
> + of_node_put(endpoint);
> +
> + /* get system clock (xclk) frequency */
> + ret = of_property_read_u32(dev->of_node, "clock-rates",
> + &ov5645->xclk_freq);
> + if (!ret) {
> + if (ov5645->xclk_freq < OV5645_XCLK_MIN ||
> + ov5645->xclk_freq > OV5645_XCLK_MAX) {
> + dev_err(dev, "invalid xclk frequency: %d\n",
> + ov5645->xclk_freq);
> + return -EINVAL;
> + }
> + }
> +
> + /* get system clock (xclk) */
> + ov5645->xclk = devm_clk_get(dev, "xclk");
> + if (IS_ERR(ov5645->xclk)) {
> + dev_err(dev, "could not get xclk");
> + return -EINVAL;
> + }
> + clk_set_rate(ov5645->xclk, ov5645->xclk_freq);
> +
> + ov5645_regulators_get(ov5645);
> +
> + ret = of_get_named_gpio(dev->of_node, "reset-gpio", 0);
> + if (!gpio_is_valid(ret)) {
> + dev_dbg(dev, "no reset pin available\n");
> + ov5645->rst_gpio = 0;
> + } else {
> + ov5645->rst_gpio = ret;
> + }
> +
> + if (ov5645->rst_gpio) {
> + ret = devm_gpio_request_one(dev, ov5645->rst_gpio,
> + GPIOF_OUT_INIT_LOW, "ov5645-reset");
> + if (ret < 0) {
> + dev_err(dev, "could not request reset gpio\n");
> + return ret;
> + }
> + }
> +
> + ret = of_get_named_gpio(dev->of_node, "pwdn-gpio", 0);
> + if (!gpio_is_valid(ret)) {
> + dev_dbg(dev, "no powerdown pin available\n");
> + ov5645->pwdn_gpio = 0;
> + } else {
> + ov5645->pwdn_gpio = ret;
> + }
> +
> + if (ov5645->pwdn_gpio) {
> + ret = devm_gpio_request_one(dev, ov5645->pwdn_gpio,
> + GPIOF_OUT_INIT_LOW, "ov5645-pwdn");
> + if (ret < 0) {
> + dev_err(dev, "could not request powerdown gpio\n");
> + return ret;
> + }
> + }
> +
> + mutex_init(&ov5645->power_lock);
> +
> + v4l2_ctrl_handler_init(&ov5645->ctrls, 7);
> + ov5645->saturation = v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
> + V4L2_CID_SATURATION, -4, 4, 1, 0);
> + ov5645->hflip = v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
> + V4L2_CID_HFLIP, 0, 1, 1, 0);
> + ov5645->vflip = v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
> + V4L2_CID_VFLIP, 0, 1, 1, 0);
> + ov5645->autogain = v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
> + V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
> + ov5645->autoexposure = v4l2_ctrl_new_std_menu(&ov5645->ctrls,
> + &ov5645_ctrl_ops, V4L2_CID_EXPOSURE_AUTO,
> + V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO);
> + ov5645->awb = v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
> + V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
> + ov5645->pattern = v4l2_ctrl_new_std_menu_items(&ov5645->ctrls,
> + &ov5645_ctrl_ops, V4L2_CID_TEST_PATTERN,
> + ARRAY_SIZE(ov5645_test_pattern_menu) - 1, 0, 0,
> + ov5645_test_pattern_menu);
> +
> + ov5645->sd.ctrl_handler = &ov5645->ctrls;
> +
> + if (ov5645->ctrls.error) {
> + dev_err(dev, "%s: control initialization error %d\n",
> + __func__, ov5645->ctrls.error);
> + ret = ov5645->ctrls.error;
> + goto free_ctrl;
> + }
> +
> + v4l2_i2c_subdev_init(&ov5645->sd, client, &ov5645_subdev_ops);
> + ov5645->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
> + ov5645->pad.flags = MEDIA_PAD_FL_SOURCE;
> + ov5645->sd.internal_ops = &ov5645_subdev_internal_ops;
> +
> + ret = media_entity_init(&ov5645->sd.entity, 1, &ov5645->pad, 0);
> + if (ret < 0) {
> + dev_err(dev, "could not register media entity\n");
> + goto free_ctrl;
> + }
> +
> + ov5645->sd.dev = &client->dev;
> + ret = v4l2_async_register_subdev(&ov5645->sd);
> + if (ret < 0) {
> + dev_err(dev, "could not register v4l2 device\n");
> + goto free_entity;
> + }
> +
> + return 0;
> +
> +free_entity:
> + media_entity_cleanup(&ov5645->sd.entity);
> +free_ctrl:
> + v4l2_ctrl_handler_free(&ov5645->ctrls);
> +
> + return ret;
> +}
> +
> +
> +static int ov5645_remove(struct i2c_client *client)
> +{
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct ov5645 *ov5645 = to_ov5645(sd);
> +
> + v4l2_async_unregister_subdev(&ov5645->sd);
> + media_entity_cleanup(&ov5645->sd.entity);
> + v4l2_ctrl_handler_free(&ov5645->ctrls);
> +
> + return 0;
> +}
> +
> +
> +static const struct i2c_device_id ov5645_id[] = {
> + { "ov5645", 0 },
> + {}
> +};
> +MODULE_DEVICE_TABLE(i2c, ov5645_id);
> +
> +#if IS_ENABLED(CONFIG_OF)
> +static const struct of_device_id ov5645_of_match[] = {
> + { .compatible = "ovti,ov5645" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, ov5645_of_match);
> +#endif
> +
> +static struct i2c_driver ov5645_i2c_driver = {
> + .driver = {
> + .of_match_table = of_match_ptr(ov5645_of_match),
> + .name = "ov5645",
> + },
> + .probe = ov5645_probe,
> + .remove = ov5645_remove,
> + .id_table = ov5645_id,
> +};
> +
> +module_i2c_driver(ov5645_i2c_driver);
> +
> +MODULE_DESCRIPTION("Omnivision OV5645 Camera Driver");
> +MODULE_AUTHOR("Todor Tomov <todor.to...@linaro.org>");
> +MODULE_LICENSE("GPL v2");
>
Regards,
Hans
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