From 95ed103ede48f9472a7aa52ea96811f96ef3c6c0 Mon Sep 17 00:00:00 2001 From: Leo Wen Date: Fri, 9 Nov 2018 15:59:25 +0800 Subject: [PATCH] media: i2c: add support for omnivision's ov7725 sensor Change-Id: I8cac9ff7d40ce01f270e92f78c0f5bb8f7e8d08b Signed-off-by: Leo Wen --- drivers/media/i2c/Kconfig | 11 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/ov7725.c | 632 +++++++++++++++++++++++++++++++++++++ 3 files changed, 644 insertions(+) create mode 100644 drivers/media/i2c/ov7725.c diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 693f9ff7f317..3cafbb6ef2cb 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -610,6 +610,17 @@ config VIDEO_OV7670 OV7670 VGA camera. It currently only works with the M88ALP01 controller. +config VIDEO_OV7725 + tristate "OmniVision OV7725 sensor support" + depends on I2C && VIDEO_V4L2 + depends on MEDIA_CAMERA_SUPPORT + help + This is a Video4Linux2 sensor-level driver for the OmniVision + OV7725 camera. + + To compile this driver as a module, choose M here: the + module will be called ov7725. + config VIDEO_OV7750 tristate "OmniVision OV7750 sensor support" depends on I2C && VIDEO_V4L2 diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index a669eb4d9a8d..69d20dea3fe1 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -63,6 +63,7 @@ obj-$(CONFIG_VIDEO_OV5695) += ov5695.o obj-$(CONFIG_VIDEO_OV7251) += ov7251.o obj-$(CONFIG_VIDEO_OV7640) += ov7640.o obj-$(CONFIG_VIDEO_OV7670) += ov7670.o +obj-$(CONFIG_VIDEO_OV7725) += ov7725.o obj-$(CONFIG_VIDEO_OV7750) += ov7750.o obj-$(CONFIG_VIDEO_OV9650) += ov9650.o obj-$(CONFIG_VIDEO_OV13850) += ov13850.o diff --git a/drivers/media/i2c/ov7725.c b/drivers/media/i2c/ov7725.c new file mode 100644 index 000000000000..8d4416f9bf8d --- /dev/null +++ b/drivers/media/i2c/ov7725.c @@ -0,0 +1,632 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ov7725 driver + * + * Copyright (C) 2018 Fuzhou Rockchip Electronics Co., Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define REG_CHIP_ID_H 0x0a +#define REG_CHIP_ID_L 0x0b +#define CHIP_ID_H 0x77 +#define CHIP_ID_L 0x21 + +#define REG_NULL 0xFF + +#define ov7725_XVCLK_FREQ 24000000 + +static const char * const ov7725_supply_names[] = { + "avdd", + "dovdd", + "dvdd", +}; + +#define ov7725_NUM_SUPPLIES ARRAY_SIZE(ov7725_supply_names) + +struct regval { + u8 addr; + u8 val; +}; + +struct ov7725_mode { + u32 width; + u32 height; + const struct regval *reg_list; +}; + +struct ov7725 { + struct i2c_client *client; + struct clk *xvclk; + struct gpio_desc *reset_gpio; + struct gpio_desc *pwdn_gpio; + struct regulator_bulk_data supplies[ov7725_NUM_SUPPLIES]; + + bool streaming; + struct mutex mutex; /* lock to serialize v4l2 callback */ + struct v4l2_subdev subdev; + struct media_pad pad; + + const struct ov7725_mode *cur_mode; +}; + +#define to_ov7725(sd) container_of(sd, struct ov7725, subdev) + +/* 30fps at 24MHz input clock,4x maximum gain */ +static struct regval ov7725_640x480_30fps[] = { + {0x12, 0x80}, + {0x3d, 0x03}, + {0x17, 0x25}, /* Raw: 0x17,0x22 */ + {0x18, 0xa4}, /* Raw: 0x18,0xa4 */ + {0x19, 0x06}, /* Raw: 0x19,0x07 */ + {0x1a, 0xf0}, + {0x32, 0x60}, /* Raw: 0x32,0x00 */ + {0x29, 0xa0}, + {0x2c, 0xf0}, + {0x2a, 0x00}, + {0x11, 0x01}, + {0x42, 0x7f}, + {0x4d, 0x00}, + {0x63, 0xe0}, + {0x64, 0xff}, + {0x65, 0x20}, + {0x66, 0x00}, + {0x67, 0x48}, + {0x13, 0xf0}, + {0x0d, 0x41}, + {0x0f, 0xc5}, + + {0x14, 0x17}, /* 0x14,0x11 */ + {0x22, 0x3f}, + {0x23, 0x07}, + {0x24, 0x44}, + {0x25, 0x3c}, + {0x26, 0xa1}, + {0x2b, 0x00}, + {0x6b, 0xaa}, + {0x13, 0xff}, + {0x90, 0x05}, + {0x91, 0x01}, + {0x92, 0x03}, + {0x93, 0x00}, + {0x94, 0x40}, + {0x95, 0x40}, + {0x96, 0x00}, + {0x97, 0x11}, + {0x98, 0x2f}, + {0x99, 0x40}, + {0x9a, 0x9e}, + {0x9b, 0x08}, + {0x9c, 0x20}, + {0x9e, 0x81}, + {0xa6, 0x06}, + {0x7e, 0x0c}, + {0x7f, 0x16}, + {0x80, 0x2a}, + {0x81, 0x4e}, + {0x82, 0x61}, + {0x83, 0x6f}, + {0x84, 0x7b}, + {0x85, 0x86}, + {0x86, 0x8e}, + {0x87, 0x97}, + {0x88, 0xa4}, + {0x89, 0xaf}, + {0x8a, 0xc5}, + {0x8b, 0xd7}, + {0x8c, 0xe8}, + {0x8d, 0x20}, + {0x33, 0x00}, + {0x22, 0x99}, + {0x23, 0x03}, + {0x4a, 0x00}, + {0x49, 0x13}, + {0x47, 0x08}, + {0x4b, 0x14}, + {0x4c, 0x17}, + {0x46, 0x05}, + {0x0e, 0x65}, + {0x0c, 0x00}, + {REG_NULL, 0x0}, +}; + +static struct regval ov7725_1600x1200_7fps[] = { + {REG_NULL, 0x0}, +}; + +static const struct ov7725_mode supported_modes[] = { + { + .width = 640, + .height = 480, + .reg_list = ov7725_640x480_30fps, + }, + { + .width = 1600, + .height = 1200, + .reg_list = ov7725_1600x1200_7fps, + }, +}; + +static int ov7725_write_reg(struct i2c_client *client, u8 reg, u8 val) +{ + int ret; + + ret = i2c_smbus_write_byte_data(client, reg, val); + + if (ret < 0) + dev_err(&client->dev, "write reg error: %d\n", ret); + + return ret; +} + +static int ov7725_write_array(struct i2c_client *client, + const struct regval *regs) +{ + int i, ret = 0; + + for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++) + ret = ov7725_write_reg(client, regs[i].addr, regs[i].val); + + return ret; +} + +static inline u8 ov7725_read_reg(struct i2c_client *client, u8 reg) +{ + return i2c_smbus_read_byte_data(client, reg); +} + +static int ov7725_get_reso_dist(const struct ov7725_mode *mode, + struct v4l2_mbus_framefmt *framefmt) +{ + return abs(mode->width - framefmt->width) + + abs(mode->height - framefmt->height); +} + +static const struct ov7725_mode * +ov7725_find_best_fit(struct v4l2_subdev_format *fmt) +{ + struct v4l2_mbus_framefmt *framefmt = &fmt->format; + int dist; + int cur_best_fit = 0; + int cur_best_fit_dist = -1; + size_t i; + + for (i = 0; i < ARRAY_SIZE(supported_modes); i++) { + dist = ov7725_get_reso_dist(&supported_modes[i], framefmt); + if (cur_best_fit_dist == -1 || dist < cur_best_fit_dist) { + cur_best_fit_dist = dist; + cur_best_fit = i; + } + } + + return &supported_modes[cur_best_fit]; +} + +static int ov7725_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct ov7725 *ov7725 = to_ov7725(sd); + const struct ov7725_mode *mode; + + mutex_lock(&ov7725->mutex); + + mode = ov7725_find_best_fit(fmt); + fmt->format.code = MEDIA_BUS_FMT_UYVY8_2X8; + fmt->format.width = mode->width; + fmt->format.height = mode->height; + fmt->format.field = V4L2_FIELD_NONE; + fmt->format.colorspace = V4L2_COLORSPACE_JPEG; + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API + *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format; +#else + mutex_unlock(&ov7725->mutex); + return -ENOTTY; +#endif + } else { + ov7725->cur_mode = mode; + } + + mutex_unlock(&ov7725->mutex); + + return 0; +} + +static int ov7725_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct ov7725 *ov7725 = to_ov7725(sd); + const struct ov7725_mode *mode = ov7725->cur_mode; + + mutex_lock(&ov7725->mutex); + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API + fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad); +#else + mutex_unlock(&ov7725->mutex); + return -ENOTTY; +#endif + } else { + fmt->format.width = mode->width; + fmt->format.height = mode->height; + fmt->format.code = MEDIA_BUS_FMT_UYVY8_2X8; + fmt->format.field = V4L2_FIELD_NONE; + fmt->format.colorspace = V4L2_COLORSPACE_JPEG; + } + mutex_unlock(&ov7725->mutex); + + return 0; +} + +static int ov7725_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(supported_modes)) + return -EINVAL; + + code->code = MEDIA_BUS_FMT_UYVY8_2X8; + + return 0; +} + +static int ov7725_enum_frame_sizes(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_size_enum *fse) +{ + u32 index = fse->index; + + if (index >= ARRAY_SIZE(supported_modes)) + return -EINVAL; + + fse->code = MEDIA_BUS_FMT_UYVY8_2X8; + + fse->min_width = supported_modes[index].width; + fse->max_width = supported_modes[index].width; + fse->max_height = supported_modes[index].height; + fse->min_height = supported_modes[index].height; + + return 0; +} + +static int __ov7725_power_on(struct ov7725 *ov7725) +{ + int ret; + struct device *dev = &ov7725->client->dev; + + if (!IS_ERR(ov7725->reset_gpio)) + gpiod_set_value_cansleep(ov7725->reset_gpio, 0); + + ret = regulator_bulk_enable(ov7725_NUM_SUPPLIES, ov7725->supplies); + if (ret < 0) { + dev_err(dev, "Failed to enable regulators\n"); + return ret; + } + + if (!IS_ERR(ov7725->xvclk)) { + ret = clk_prepare_enable(ov7725->xvclk); + if (ret < 0) { + dev_err(dev, "Failed to enable xvclk\n"); + return ret; + } + } + + if (!IS_ERR(ov7725->pwdn_gpio)) + gpiod_set_value_cansleep(ov7725->pwdn_gpio, 0); + + if (!IS_ERR(ov7725->reset_gpio)) + gpiod_set_value_cansleep(ov7725->reset_gpio, 1); + + return 0; +} + +static void __ov7725_power_off(struct ov7725 *ov7725) +{ + if (!IS_ERR(ov7725->reset_gpio)) + gpiod_set_value_cansleep(ov7725->reset_gpio, 0); + if (!IS_ERR(ov7725->pwdn_gpio)) + gpiod_set_value_cansleep(ov7725->pwdn_gpio, 1); + + if (!IS_ERR(ov7725->xvclk)) + clk_disable_unprepare(ov7725->xvclk); + + regulator_bulk_disable(ov7725_NUM_SUPPLIES, ov7725->supplies); +} + +static int ov7725_s_stream(struct v4l2_subdev *sd, int on) +{ + struct ov7725 *ov7725 = to_ov7725(sd); + struct i2c_client *client = ov7725->client; + int ret = 0; + + mutex_lock(&ov7725->mutex); + + on = !!on; + if (on == ov7725->streaming) + goto unlock_and_return; + + if (on) { + ret = pm_runtime_get_sync(&ov7725->client->dev); + if (ret < 0) { + pm_runtime_put_noidle(&client->dev); + goto unlock_and_return; + } + + ret = ov7725_write_array(ov7725->client, + ov7725->cur_mode->reg_list); + if (ret) { + pm_runtime_put(&client->dev); + goto unlock_and_return; + } + + } else { + pm_runtime_put(&client->dev); + } + + ov7725->streaming = on; + +unlock_and_return: + mutex_unlock(&ov7725->mutex); + + return ret; +} + +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API +static int ov7725_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + struct ov7725 *ov7725 = to_ov7725(sd); + struct v4l2_mbus_framefmt *try_fmt = + v4l2_subdev_get_try_format(sd, fh->pad, 0); + const struct ov7725_mode *def_mode = &supported_modes[0]; + + mutex_lock(&ov7725->mutex); + + try_fmt->width = def_mode->width; + try_fmt->height = def_mode->height; + try_fmt->code = MEDIA_BUS_FMT_UYVY8_2X8; + try_fmt->field = V4L2_FIELD_NONE; + try_fmt->colorspace = V4L2_COLORSPACE_JPEG; + + mutex_unlock(&ov7725->mutex); + + return 0; +} +#endif + +static int ov7725_runtime_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov7725 *ov7725 = to_ov7725(sd); + + return __ov7725_power_on(ov7725); +} + +static int ov7725_runtime_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov7725 *ov7725 = to_ov7725(sd); + + __ov7725_power_off(ov7725); + + return 0; +} + +static const struct dev_pm_ops ov7725_pm_ops = { + SET_RUNTIME_PM_OPS(ov7725_runtime_suspend, + ov7725_runtime_resume, NULL) +}; + +static const struct v4l2_subdev_video_ops ov7725_video_ops = { + .s_stream = ov7725_s_stream, +}; + +static const struct v4l2_subdev_pad_ops ov7725_pad_ops = { + .enum_mbus_code = ov7725_enum_mbus_code, + .enum_frame_size = ov7725_enum_frame_sizes, + .get_fmt = ov7725_get_fmt, + .set_fmt = ov7725_set_fmt, +}; + +static const struct v4l2_subdev_ops ov7725_subdev_ops = { + .video = &ov7725_video_ops, + .pad = &ov7725_pad_ops, +}; + +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API +static const struct v4l2_subdev_internal_ops ov7725_internal_ops = { + .open = ov7725_open, +}; +#endif + +static int ov7725_check_sensor_id(struct ov7725 *ov7725, + struct i2c_client *client) +{ + struct device *dev = &ov7725->client->dev; + u8 id_h = 0, id_l = 0; + + id_h = ov7725_read_reg(client, REG_CHIP_ID_H); + id_l = ov7725_read_reg(client, REG_CHIP_ID_L); + if (id_h != CHIP_ID_H && id_l != CHIP_ID_L) { + dev_err(dev, "Wrong camera sensor id(0x%02x%02x)\n", + id_h, id_l); + return -EINVAL; + } + + dev_info(dev, "Detected ov7725 (0x%02x%02x) sensor\n", + CHIP_ID_H, CHIP_ID_L); + + return 0; +} + +static int ov7725_configure_regulators(struct ov7725 *ov7725) +{ + u32 i; + + for (i = 0; i < ov7725_NUM_SUPPLIES; i++) + ov7725->supplies[i].supply = ov7725_supply_names[i]; + + return devm_regulator_bulk_get(&ov7725->client->dev, + ov7725_NUM_SUPPLIES, + ov7725->supplies); +} + +static int ov7725_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct ov7725 *ov7725; + int ret; + + ov7725 = devm_kzalloc(dev, sizeof(*ov7725), GFP_KERNEL); + if (!ov7725) + return -ENOMEM; + + ov7725->client = client; + ov7725->cur_mode = &supported_modes[0]; + + ov7725->xvclk = devm_clk_get(dev, "xvclk"); + if (IS_ERR(ov7725->xvclk)) { + dev_err(dev, "Failed to get xvclk\n"); + return -EINVAL; + } + ret = clk_set_rate(ov7725->xvclk, ov7725_XVCLK_FREQ); + if (ret < 0) { + dev_err(dev, "Failed to set xvclk rate (24MHz)\n"); + return ret; + } + if (clk_get_rate(ov7725->xvclk) != ov7725_XVCLK_FREQ) + dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n"); + + ov7725->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(ov7725->reset_gpio)) + dev_warn(dev, "Failed to get reset-gpios\n"); + + ov7725->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW); + if (IS_ERR(ov7725->pwdn_gpio)) + dev_warn(dev, "Failed to get ov7725-gpios\n"); + + ret = ov7725_configure_regulators(ov7725); + if (ret) { + dev_warn(dev, "Failed to get power regulators\n"); + return ret; + } + + mutex_init(&ov7725->mutex); + v4l2_i2c_subdev_init(&ov7725->subdev, client, &ov7725_subdev_ops); + + ret = __ov7725_power_on(ov7725); + if (ret) + goto err_destroy_mutex; + + ret = ov7725_check_sensor_id(ov7725, client); + if (ret) + goto err_power_off; +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API + ov7725->subdev.internal_ops = &ov7725_internal_ops; + ov7725->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; +#endif +#if defined(CONFIG_MEDIA_CONTROLLER) + ov7725->pad.flags = MEDIA_PAD_FL_SOURCE; + ov7725->subdev.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR; + ret = media_entity_init(&ov7725->subdev.entity, 1, &ov7725->pad, 0); + if (ret < 0) + goto err_power_off; +#endif + + ret = v4l2_async_register_subdev(&ov7725->subdev); + if (ret) { + dev_err(dev, "v4l2 async register subdev failed\n"); + goto err_clean_entity; + } + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_idle(dev); + + return 0; + +err_clean_entity: +#if defined(CONFIG_MEDIA_CONTROLLER) + media_entity_cleanup(&ov7725->subdev.entity); +#endif +err_power_off: + __ov7725_power_off(ov7725); +err_destroy_mutex: + mutex_destroy(&ov7725->mutex); + + return ret; +} + +static int ov7725_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov7725 *ov7725 = to_ov7725(sd); + + v4l2_async_unregister_subdev(sd); +#if defined(CONFIG_MEDIA_CONTROLLER) + media_entity_cleanup(&sd->entity); +#endif + mutex_destroy(&ov7725->mutex); + + pm_runtime_disable(&client->dev); + if (!pm_runtime_status_suspended(&client->dev)) + __ov7725_power_off(ov7725); + pm_runtime_set_suspended(&client->dev); + + return 0; +} + +#if IS_ENABLED(CONFIG_OF) +static const struct of_device_id ov7725_of_match[] = { + { .compatible = "ovti,ov7725" }, + {}, +}; +MODULE_DEVICE_TABLE(of, ov7725_of_match); +#endif + +static const struct i2c_device_id ov7725_match_id[] = { + {"ovti,ov7251", 0}, + {}, +}; + +static struct i2c_driver ov7725_i2c_driver = { + .driver = { + .name = "ov7725", + .pm = &ov7725_pm_ops, + .of_match_table = of_match_ptr(ov7725_of_match), + }, + .probe = ov7725_probe, + .remove = ov7725_remove, + .id_table = ov7725_match_id, +}; + +static int __init sensor_mod_init(void) +{ + return i2c_add_driver(&ov7725_i2c_driver); +} + +static void __exit sensor_mod_exit(void) +{ + i2c_del_driver(&ov7725_i2c_driver); +} + +device_initcall_sync(sensor_mod_init); +module_exit(sensor_mod_exit); + +MODULE_DESCRIPTION("OmniVision ov7725 sensor driver"); +MODULE_LICENSE("GPL v2"); \ No newline at end of file