diff options
Diffstat (limited to 'drivers/media/i2c/ov5670.c')
-rw-r--r-- | drivers/media/i2c/ov5670.c | 312 |
1 files changed, 267 insertions, 45 deletions
diff --git a/drivers/media/i2c/ov5670.c b/drivers/media/i2c/ov5670.c index bc9fc3bc90c2..f79d908f4531 100644 --- a/drivers/media/i2c/ov5670.c +++ b/drivers/media/i2c/ov5670.c @@ -1,15 +1,24 @@ // SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2017 Intel Corporation. +#include <asm/unaligned.h> #include <linux/acpi.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> #include <linux/i2c.h> +#include <linux/mod_devicetable.h> #include <linux/module.h> +#include <linux/of.h> #include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-device.h> #include <media/v4l2-event.h> #include <media/v4l2-fwnode.h> +#define OV5670_XVCLK_FREQ 19200000 + #define OV5670_REG_CHIP_ID 0x300a #define OV5670_CHIP_ID 0x005670 @@ -65,6 +74,10 @@ #define OV5670_REG_VALUE_16BIT 2 #define OV5670_REG_VALUE_24BIT 3 +/* Pixel Array */ +#define OV5670_NATIVE_WIDTH 2624 +#define OV5670_NATIVE_HEIGHT 1980 + /* Initial number of frames to skip to avoid possible garbage */ #define OV5670_NUM_OF_SKIP_FRAMES 2 @@ -83,6 +96,14 @@ struct ov5670_link_freq_config { const struct ov5670_reg_list reg_list; }; +static const char * const ov5670_supply_names[] = { + "avdd", /* Analog power */ + "dvdd", /* Digital power */ + "dovdd", /* Digital output power */ +}; + +#define OV5670_NUM_SUPPLIES ARRAY_SIZE(ov5670_supply_names) + struct ov5670_mode { /* Frame width in pixels */ u32 width; @@ -99,10 +120,25 @@ struct ov5670_mode { /* Link frequency needed for this resolution */ u32 link_freq_index; + /* Analog crop rectangle */ + const struct v4l2_rect *analog_crop; + /* Sensor register settings for this resolution */ const struct ov5670_reg_list reg_list; }; +/* + * All the modes supported by the driver are obtained by subsampling the + * full pixel array. The below values are reflected in registers from + * 0x3800-0x3807 in the modes register-value tables. + */ +static const struct v4l2_rect ov5670_analog_crop = { + .left = 12, + .top = 4, + .width = 2600, + .height = 1952, +}; + static const struct ov5670_reg mipi_data_rate_840mbps[] = { {0x0300, 0x04}, {0x0301, 0x00}, @@ -1750,66 +1786,73 @@ static const struct ov5670_mode supported_modes[] = { .height = 1944, .vts_def = OV5670_VTS_30FPS, .vts_min = OV5670_VTS_30FPS, + .link_freq_index = OV5670_LINK_FREQ_422MHZ_INDEX, + .analog_crop = &ov5670_analog_crop, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_2592x1944_regs), .regs = mode_2592x1944_regs, }, - .link_freq_index = OV5670_LINK_FREQ_422MHZ_INDEX, }, { .width = 1296, .height = 972, .vts_def = OV5670_VTS_30FPS, .vts_min = 996, + .link_freq_index = OV5670_LINK_FREQ_422MHZ_INDEX, + .analog_crop = &ov5670_analog_crop, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_1296x972_regs), .regs = mode_1296x972_regs, }, - .link_freq_index = OV5670_LINK_FREQ_422MHZ_INDEX, }, { .width = 648, .height = 486, .vts_def = OV5670_VTS_30FPS, .vts_min = 516, + .link_freq_index = OV5670_LINK_FREQ_422MHZ_INDEX, + .analog_crop = &ov5670_analog_crop, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_648x486_regs), .regs = mode_648x486_regs, }, - .link_freq_index = OV5670_LINK_FREQ_422MHZ_INDEX, }, { .width = 2560, .height = 1440, .vts_def = OV5670_VTS_30FPS, .vts_min = OV5670_VTS_30FPS, + .link_freq_index = OV5670_LINK_FREQ_422MHZ_INDEX, + .analog_crop = &ov5670_analog_crop, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_2560x1440_regs), .regs = mode_2560x1440_regs, }, - .link_freq_index = OV5670_LINK_FREQ_422MHZ_INDEX, }, { .width = 1280, .height = 720, .vts_def = OV5670_VTS_30FPS, .vts_min = 1020, + + .link_freq_index = OV5670_LINK_FREQ_422MHZ_INDEX, + .analog_crop = &ov5670_analog_crop, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_1280x720_regs), .regs = mode_1280x720_regs, }, - .link_freq_index = OV5670_LINK_FREQ_422MHZ_INDEX, }, { .width = 640, .height = 360, .vts_def = OV5670_VTS_30FPS, .vts_min = 510, + .link_freq_index = OV5670_LINK_FREQ_422MHZ_INDEX, + .analog_crop = &ov5670_analog_crop, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_640x360_regs), .regs = mode_640x360_regs, }, - .link_freq_index = OV5670_LINK_FREQ_422MHZ_INDEX, } }; @@ -1828,6 +1871,16 @@ struct ov5670 { /* Current mode */ const struct ov5670_mode *cur_mode; + /* xvclk input clock */ + struct clk *xvclk; + + /* Regulators */ + struct regulator_bulk_data supplies[OV5670_NUM_SUPPLIES]; + + /* Power-down and reset gpios. */ + struct gpio_desc *pwdn_gpio; /* PWDNB pin. */ + struct gpio_desc *reset_gpio; /* XSHUTDOWN pin. */ + /* To serialize asynchronus callbacks */ struct mutex mutex; @@ -1935,27 +1988,6 @@ static int ov5670_write_reg_list(struct ov5670 *ov5670, return ov5670_write_regs(ov5670, r_list->regs, r_list->num_of_regs); } -/* Open sub-device */ -static int ov5670_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) -{ - struct ov5670 *ov5670 = to_ov5670(sd); - struct v4l2_mbus_framefmt *try_fmt = - v4l2_subdev_get_try_format(sd, fh->state, 0); - - mutex_lock(&ov5670->mutex); - - /* Initialize try_fmt */ - try_fmt->width = ov5670->cur_mode->width; - try_fmt->height = ov5670->cur_mode->height; - try_fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; - try_fmt->field = V4L2_FIELD_NONE; - - /* No crop or compose */ - mutex_unlock(&ov5670->mutex); - - return 0; -} - static int ov5670_update_digital_gain(struct ov5670 *ov5670, u32 d_gain) { int ret; @@ -2006,7 +2038,7 @@ static int ov5670_set_ctrl(struct v4l2_ctrl *ctrl) struct ov5670, ctrl_handler); struct i2c_client *client = v4l2_get_subdevdata(&ov5670->sd); s64 max; - int ret = 0; + int ret; /* Propagate change of current control to all related controls */ switch (ctrl->id) { @@ -2045,7 +2077,13 @@ static int ov5670_set_ctrl(struct v4l2_ctrl *ctrl) case V4L2_CID_TEST_PATTERN: ret = ov5670_enable_test_pattern(ov5670, ctrl->val); break; + case V4L2_CID_HBLANK: + case V4L2_CID_LINK_FREQ: + case V4L2_CID_PIXEL_RATE: + ret = 0; + break; default: + ret = -EINVAL; dev_info(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n", __func__, ctrl->id, ctrl->val); break; @@ -2155,6 +2193,28 @@ error: return ret; } +static int ov5670_init_cfg(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state) +{ + struct v4l2_mbus_framefmt *fmt = + v4l2_subdev_get_try_format(sd, state, 0); + const struct ov5670_mode *default_mode = &supported_modes[0]; + struct v4l2_rect *crop = v4l2_subdev_get_try_crop(sd, state, 0); + + fmt->width = default_mode->width; + fmt->height = default_mode->height; + fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; + fmt->field = V4L2_FIELD_NONE; + fmt->colorspace = V4L2_COLORSPACE_SRGB; + fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(V4L2_COLORSPACE_SRGB); + fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE; + fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(V4L2_COLORSPACE_SRGB); + + *crop = *default_mode->analog_crop; + + return 0; +} + static int ov5670_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) @@ -2404,6 +2464,49 @@ unlock_and_return: return ret; } +static int __maybe_unused ov5670_runtime_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov5670 *ov5670 = to_ov5670(sd); + unsigned long delay_us; + int ret; + + ret = clk_prepare_enable(ov5670->xvclk); + if (ret) + return ret; + + ret = regulator_bulk_enable(OV5670_NUM_SUPPLIES, ov5670->supplies); + if (ret) { + clk_disable_unprepare(ov5670->xvclk); + return ret; + } + + gpiod_set_value_cansleep(ov5670->pwdn_gpio, 0); + gpiod_set_value_cansleep(ov5670->reset_gpio, 0); + + /* 8192 * 2 clock pulses before the first SCCB transaction. */ + delay_us = DIV_ROUND_UP(8192 * 2 * 1000, + DIV_ROUND_UP(OV5670_XVCLK_FREQ, 1000)); + fsleep(delay_us); + + return 0; +} + +static int __maybe_unused ov5670_runtime_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov5670 *ov5670 = to_ov5670(sd); + + gpiod_set_value_cansleep(ov5670->reset_gpio, 1); + gpiod_set_value_cansleep(ov5670->pwdn_gpio, 1); + regulator_bulk_disable(OV5670_NUM_SUPPLIES, ov5670->supplies); + clk_disable_unprepare(ov5670->xvclk); + + return 0; +} + static int __maybe_unused ov5670_suspend(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); @@ -2438,15 +2541,64 @@ static const struct v4l2_subdev_core_ops ov5670_core_ops = { .unsubscribe_event = v4l2_event_subdev_unsubscribe, }; +static const struct v4l2_rect * +__ov5670_get_pad_crop(struct ov5670 *sensor, struct v4l2_subdev_state *state, + unsigned int pad, enum v4l2_subdev_format_whence which) +{ + const struct ov5670_mode *mode = sensor->cur_mode; + + switch (which) { + case V4L2_SUBDEV_FORMAT_TRY: + return v4l2_subdev_get_try_crop(&sensor->sd, state, pad); + case V4L2_SUBDEV_FORMAT_ACTIVE: + return mode->analog_crop; + } + + return NULL; +} + +static int ov5670_get_selection(struct v4l2_subdev *subdev, + struct v4l2_subdev_state *state, + struct v4l2_subdev_selection *sel) +{ + struct ov5670 *sensor = to_ov5670(subdev); + + switch (sel->target) { + case V4L2_SEL_TGT_CROP: + mutex_lock(&sensor->mutex); + sel->r = *__ov5670_get_pad_crop(sensor, state, sel->pad, + sel->which); + mutex_unlock(&sensor->mutex); + break; + case V4L2_SEL_TGT_NATIVE_SIZE: + case V4L2_SEL_TGT_CROP_BOUNDS: + sel->r.top = 0; + sel->r.left = 0; + sel->r.width = OV5670_NATIVE_WIDTH; + sel->r.height = OV5670_NATIVE_HEIGHT; + break; + case V4L2_SEL_TGT_CROP_DEFAULT: + sel->r = ov5670_analog_crop; + break; + default: + return -EINVAL; + } + + return 0; +} + static const struct v4l2_subdev_video_ops ov5670_video_ops = { .s_stream = ov5670_set_stream, }; static const struct v4l2_subdev_pad_ops ov5670_pad_ops = { + .init_cfg = ov5670_init_cfg, .enum_mbus_code = ov5670_enum_mbus_code, .get_fmt = ov5670_get_pad_format, .set_fmt = ov5670_set_pad_format, .enum_frame_size = ov5670_enum_frame_size, + .get_selection = ov5670_get_selection, + .set_selection = ov5670_get_selection, }; static const struct v4l2_subdev_sensor_ops ov5670_sensor_ops = { @@ -2464,9 +2616,34 @@ static const struct media_entity_operations ov5670_subdev_entity_ops = { .link_validate = v4l2_subdev_link_validate, }; -static const struct v4l2_subdev_internal_ops ov5670_internal_ops = { - .open = ov5670_open, -}; +static int ov5670_regulators_probe(struct ov5670 *ov5670) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov5670->sd); + unsigned int i; + + for (i = 0; i < OV5670_NUM_SUPPLIES; i++) + ov5670->supplies[i].supply = ov5670_supply_names[i]; + + return devm_regulator_bulk_get(&client->dev, OV5670_NUM_SUPPLIES, + ov5670->supplies); +} + +static int ov5670_gpio_probe(struct ov5670 *ov5670) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov5670->sd); + + ov5670->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "powerdown", + GPIOD_OUT_LOW); + if (IS_ERR(ov5670->pwdn_gpio)) + return PTR_ERR(ov5670->pwdn_gpio); + + ov5670->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(ov5670->reset_gpio)) + return PTR_ERR(ov5670->reset_gpio); + + return 0; +} static int ov5670_probe(struct i2c_client *client) { @@ -2476,10 +2653,6 @@ static int ov5670_probe(struct i2c_client *client) bool full_power; int ret; - device_property_read_u32(&client->dev, "clock-frequency", &input_clk); - if (input_clk != 19200000) - return -EINVAL; - ov5670 = devm_kzalloc(&client->dev, sizeof(*ov5670), GFP_KERNEL); if (!ov5670) { ret = -ENOMEM; @@ -2487,16 +2660,50 @@ static int ov5670_probe(struct i2c_client *client) goto error_print; } + ov5670->xvclk = devm_clk_get(&client->dev, NULL); + if (!IS_ERR_OR_NULL(ov5670->xvclk)) + input_clk = clk_get_rate(ov5670->xvclk); + else if (PTR_ERR(ov5670->xvclk) == -ENOENT) + device_property_read_u32(&client->dev, "clock-frequency", + &input_clk); + else + return dev_err_probe(&client->dev, PTR_ERR(ov5670->xvclk), + "error getting clock\n"); + + if (input_clk != OV5670_XVCLK_FREQ) { + dev_err(&client->dev, + "Unsupported clock frequency %u\n", input_clk); + return -EINVAL; + } + /* Initialize subdev */ v4l2_i2c_subdev_init(&ov5670->sd, client, &ov5670_subdev_ops); + ret = ov5670_regulators_probe(ov5670); + if (ret) { + err_msg = "Regulators probe failed"; + goto error_print; + } + + ret = ov5670_gpio_probe(ov5670); + if (ret) { + err_msg = "GPIO probe failed"; + goto error_print; + } + full_power = acpi_dev_state_d0(&client->dev); if (full_power) { + ret = ov5670_runtime_resume(&client->dev); + if (ret) { + err_msg = "Power up failed"; + goto error_print; + } + /* Check module identity */ ret = ov5670_identify_module(ov5670); if (ret) { err_msg = "ov5670_identify_module() error"; - goto error_print; + goto error_power_off; } } @@ -2511,7 +2718,6 @@ static int ov5670_probe(struct i2c_client *client) goto error_mutex_destroy; } - ov5670->sd.internal_ops = &ov5670_internal_ops; ov5670->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; ov5670->sd.entity.ops = &ov5670_subdev_entity_ops; @@ -2525,24 +2731,27 @@ static int ov5670_probe(struct i2c_client *client) goto error_handler_free; } - /* Async register for subdev */ - ret = v4l2_async_register_subdev_sensor(&ov5670->sd); - if (ret < 0) { - err_msg = "v4l2_async_register_subdev() error"; - goto error_entity_cleanup; - } - ov5670->streaming = false; /* Set the device's state to active if it's in D0 state. */ if (full_power) pm_runtime_set_active(&client->dev); pm_runtime_enable(&client->dev); + + /* Async register for subdev */ + ret = v4l2_async_register_subdev_sensor(&ov5670->sd); + if (ret < 0) { + err_msg = "v4l2_async_register_subdev() error"; + goto error_pm_disable; + } + pm_runtime_idle(&client->dev); return 0; -error_entity_cleanup: +error_pm_disable: + pm_runtime_disable(&client->dev); + media_entity_cleanup(&ov5670->sd.entity); error_handler_free: @@ -2551,6 +2760,10 @@ error_handler_free: error_mutex_destroy: mutex_destroy(&ov5670->mutex); +error_power_off: + if (full_power) + ov5670_runtime_suspend(&client->dev); + error_print: dev_err(&client->dev, "%s: %s %d\n", __func__, err_msg, ret); @@ -2568,10 +2781,12 @@ static void ov5670_remove(struct i2c_client *client) mutex_destroy(&ov5670->mutex); pm_runtime_disable(&client->dev); + ov5670_runtime_suspend(&client->dev); } static const struct dev_pm_ops ov5670_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(ov5670_suspend, ov5670_resume) + SET_RUNTIME_PM_OPS(ov5670_runtime_suspend, ov5670_runtime_resume, NULL) }; #ifdef CONFIG_ACPI @@ -2583,11 +2798,18 @@ static const struct acpi_device_id ov5670_acpi_ids[] = { MODULE_DEVICE_TABLE(acpi, ov5670_acpi_ids); #endif +static const struct of_device_id ov5670_of_ids[] = { + { .compatible = "ovti,ov5670" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ov5670_of_ids); + static struct i2c_driver ov5670_i2c_driver = { .driver = { .name = "ov5670", .pm = &ov5670_pm_ops, .acpi_match_table = ACPI_PTR(ov5670_acpi_ids), + .of_match_table = ov5670_of_ids, }, .probe_new = ov5670_probe, .remove = ov5670_remove, |