[media] media: i2c: Add support for OV5647 sensor (3c2472a3) · Commits · e / devices / android_kernel_oneplus_sm7250

MAINTAINERS

+7 −0

Original line number	Diff line number	Diff line
		@@ -9268,6 +9268,13 @@ M: Harald Welte <laforge@gnumonks.org>
		S: Maintained
		F: drivers/char/pcmcia/cm4040_cs.*

		OMNIVISION OV5647 SENSOR DRIVER
		M: Ramiro Oliveira <roliveir@synopsys.com>
		L: linux-media@vger.kernel.org
		T: git git://linuxtv.org/media_tree.git
		S: Maintained
		F: drivers/media/i2c/ov5647.c

		OMNIVISION OV7670 SENSOR DRIVER
		M: Jonathan Corbet <corbet@lwn.net>
		L: linux-media@vger.kernel.org

drivers/media/i2c/Kconfig

+11 −0

Original line number	Diff line number	Diff line
		@@ -554,6 +554,17 @@ config VIDEO_OV5645
		To compile this driver as a module, choose M here: the
		module will be called ov5645.

		config VIDEO_OV5647
		tristate "OmniVision OV5647 sensor support"
		depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
		depends on MEDIA_CAMERA_SUPPORT
		---help---
		This is a Video4Linux2 sensor-level driver for the OmniVision
		OV5647 camera.

		To compile this driver as a module, choose M here: the
		module will be called ov5647.

		config VIDEO_OV7640
		tristate "OmniVision OV7640 sensor support"
		depends on I2C && VIDEO_V4L2

drivers/media/i2c/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -59,6 +59,7 @@ obj-$(CONFIG_VIDEO_UPD64031A) += upd64031a.o
		obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o
		obj-$(CONFIG_VIDEO_OV2640) += ov2640.o
		obj-$(CONFIG_VIDEO_OV5645) += ov5645.o
		obj-$(CONFIG_VIDEO_OV5647) += ov5647.o
		obj-$(CONFIG_VIDEO_OV7640) += ov7640.o
		obj-$(CONFIG_VIDEO_OV7670) += ov7670.o
		obj-$(CONFIG_VIDEO_OV9650) += ov9650.o

drivers/media/i2c/ov5647.c

0 → 100644

+634 −0

Original line number	Diff line number	Diff line
		/*
		* A V4L2 driver for OmniVision OV5647 cameras.
		*
		* Based on Samsung S5K6AAFX SXGA 1/6" 1.3M CMOS Image Sensor driver
		* Copyright (C) 2011 Sylwester Nawrocki <s.nawrocki@samsung.com>
		*
		* Based on Omnivision OV7670 Camera Driver
		* Copyright (C) 2006-7 Jonathan Corbet <corbet@lwn.net>
		*
		* Copyright (C) 2016, Synopsys, Inc.
		*
		* This program is free software; you can redistribute it and/or
		* modify it under the terms of the GNU General Public License as
		* published by the Free Software Foundation version 2.
		*
		* This program is distributed .as is. WITHOUT ANY WARRANTY of any
		* kind, whether express or implied; without even the implied warranty
		* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*/

		#include <linux/clk.h>
		#include <linux/delay.h>
		#include <linux/i2c.h>
		#include <linux/init.h>
		#include <linux/io.h>
		#include <linux/module.h>
		#include <linux/slab.h>
		#include <linux/videodev2.h>
		#include <media/v4l2-device.h>
		#include <media/v4l2-image-sizes.h>
		#include <media/v4l2-mediabus.h>
		#include <media/v4l2-of.h>

		#define SENSOR_NAME "ov5647"

		#define OV5647_SW_RESET 0x0103
		#define OV5647_REG_CHIPID_H 0x300A
		#define OV5647_REG_CHIPID_L 0x300B

		#define REG_TERM 0xfffe
		#define VAL_TERM 0xfe
		#define REG_DLY 0xffff

		#define OV5647_ROW_START 0x01
		#define OV5647_ROW_START_MIN 0
		#define OV5647_ROW_START_MAX 2004
		#define OV5647_ROW_START_DEF 54

		#define OV5647_COLUMN_START 0x02
		#define OV5647_COLUMN_START_MIN 0
		#define OV5647_COLUMN_START_MAX 2750
		#define OV5647_COLUMN_START_DEF 16

		#define OV5647_WINDOW_HEIGHT 0x03
		#define OV5647_WINDOW_HEIGHT_MIN 2
		#define OV5647_WINDOW_HEIGHT_MAX 2006
		#define OV5647_WINDOW_HEIGHT_DEF 1944

		#define OV5647_WINDOW_WIDTH 0x04
		#define OV5647_WINDOW_WIDTH_MIN 2
		#define OV5647_WINDOW_WIDTH_MAX 2752
		#define OV5647_WINDOW_WIDTH_DEF 2592

		struct regval_list {
		u16 addr;
		u8 data;
		};

		struct ov5647 {
		struct v4l2_subdev sd;
		struct media_pad pad;
		struct mutex lock;
		struct v4l2_mbus_framefmt format;
		unsigned int width;
		unsigned int height;
		int power_count;
		struct clk *xclk;
		};

		static inline struct ov5647 to_state(struct v4l2_subdev sd)
		{
		return container_of(sd, struct ov5647, sd);
		}

		static struct regval_list sensor_oe_disable_regs[] = {
		{0x3000, 0x00},
		{0x3001, 0x00},
		{0x3002, 0x00},
		};

		static struct regval_list sensor_oe_enable_regs[] = {
		{0x3000, 0x0f},
		{0x3001, 0xff},
		{0x3002, 0xe4},
		};

		static struct regval_list ov5647_640x480[] = {
		{0x0100, 0x00},
		{0x0103, 0x01},
		{0x3034, 0x08},
		{0x3035, 0x21},
		{0x3036, 0x46},
		{0x303c, 0x11},
		{0x3106, 0xf5},
		{0x3821, 0x07},
		{0x3820, 0x41},
		{0x3827, 0xec},
		{0x370c, 0x0f},
		{0x3612, 0x59},
		{0x3618, 0x00},
		{0x5000, 0x06},
		{0x5001, 0x01},
		{0x5002, 0x41},
		{0x5003, 0x08},
		{0x5a00, 0x08},
		{0x3000, 0x00},
		{0x3001, 0x00},
		{0x3002, 0x00},
		{0x3016, 0x08},
		{0x3017, 0xe0},
		{0x3018, 0x44},
		{0x301c, 0xf8},
		{0x301d, 0xf0},
		{0x3a18, 0x00},
		{0x3a19, 0xf8},
		{0x3c01, 0x80},
		{0x3b07, 0x0c},
		{0x380c, 0x07},
		{0x380d, 0x68},
		{0x380e, 0x03},
		{0x380f, 0xd8},
		{0x3814, 0x31},
		{0x3815, 0x31},
		{0x3708, 0x64},
		{0x3709, 0x52},
		{0x3808, 0x02},
		{0x3809, 0x80},
		{0x380a, 0x01},
		{0x380b, 0xE0},
		{0x3801, 0x00},
		{0x3802, 0x00},
		{0x3803, 0x00},
		{0x3804, 0x0a},
		{0x3805, 0x3f},
		{0x3806, 0x07},
		{0x3807, 0xa1},
		{0x3811, 0x08},
		{0x3813, 0x02},
		{0x3630, 0x2e},
		{0x3632, 0xe2},
		{0x3633, 0x23},
		{0x3634, 0x44},
		{0x3636, 0x06},
		{0x3620, 0x64},
		{0x3621, 0xe0},
		{0x3600, 0x37},
		{0x3704, 0xa0},
		{0x3703, 0x5a},
		{0x3715, 0x78},
		{0x3717, 0x01},
		{0x3731, 0x02},
		{0x370b, 0x60},
		{0x3705, 0x1a},
		{0x3f05, 0x02},
		{0x3f06, 0x10},
		{0x3f01, 0x0a},
		{0x3a08, 0x01},
		{0x3a09, 0x27},
		{0x3a0a, 0x00},
		{0x3a0b, 0xf6},
		{0x3a0d, 0x04},
		{0x3a0e, 0x03},
		{0x3a0f, 0x58},
		{0x3a10, 0x50},
		{0x3a1b, 0x58},
		{0x3a1e, 0x50},
		{0x3a11, 0x60},
		{0x3a1f, 0x28},
		{0x4001, 0x02},
		{0x4004, 0x02},
		{0x4000, 0x09},
		{0x4837, 0x24},
		{0x4050, 0x6e},
		{0x4051, 0x8f},
		{0x0100, 0x01},
		};

		static int ov5647_write(struct v4l2_subdev *sd, u16 reg, u8 val)
		{
		int ret;
		unsigned char data[3] = { reg >> 8, reg & 0xff, val};
		struct i2c_client *client = v4l2_get_subdevdata(sd);

		ret = i2c_master_send(client, data, 3);
		if (ret < 0)
		dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
		__func__, reg);

		return ret;
		}

		static int ov5647_read(struct v4l2_subdev sd, u16 reg, u8 val)
		{
		int ret;
		unsigned char data_w[2] = { reg >> 8, reg & 0xff };
		struct i2c_client *client = v4l2_get_subdevdata(sd);

		ret = i2c_master_send(client, data_w, 2);
		if (ret < 0) {
		dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
		__func__, reg);
		return ret;
		}

		ret = i2c_master_recv(client, val, 1);
		if (ret < 0)
		dev_dbg(&client->dev, "%s: i2c read error, reg: %x\n",
		__func__, reg);

		return ret;
		}

		static int ov5647_write_array(struct v4l2_subdev *sd,
		struct regval_list *regs, int array_size)
		{
		int i, ret;

		for (i = 0; i < array_size; i++) {
		ret = ov5647_write(sd, regs[i].addr, regs[i].data);
		if (ret < 0)
		return ret;
		}

		return 0;
		}

		static int ov5647_set_virtual_channel(struct v4l2_subdev *sd, int channel)
		{
		u8 channel_id;
		int ret;

		ret = ov5647_read(sd, 0x4814, &channel_id);
		if (ret < 0)
		return ret;

		channel_id &= ~(3 << 6);
		return ov5647_write(sd, 0x4814, channel_id \| (channel << 6));
		}

		static int ov5647_stream_on(struct v4l2_subdev *sd)
		{
		int ret;

		ret = ov5647_write(sd, 0x4202, 0x00);
		if (ret < 0)
		return ret;

		return ov5647_write(sd, 0x300D, 0x00);
		}

		static int ov5647_stream_off(struct v4l2_subdev *sd)
		{
		int ret;

		ret = ov5647_write(sd, 0x4202, 0x0f);
		if (ret < 0)
		return ret;

		return ov5647_write(sd, 0x300D, 0x01);
		}

		static int set_sw_standby(struct v4l2_subdev *sd, bool standby)
		{
		int ret;
		u8 rdval;

		ret = ov5647_read(sd, 0x0100, &rdval);
		if (ret < 0)
		return ret;

		if (standby)
		rdval &= ~0x01;
		else
		rdval \|= 0x01;

		return ov5647_write(sd, 0x0100, rdval);
		}

		static int __sensor_init(struct v4l2_subdev *sd)
		{
		int ret;
		u8 resetval, rdval;
		struct i2c_client *client = v4l2_get_subdevdata(sd);

		ret = ov5647_read(sd, 0x0100, &rdval);
		if (ret < 0)
		return ret;

		ret = ov5647_write_array(sd, ov5647_640x480,
		ARRAY_SIZE(ov5647_640x480));
		if (ret < 0) {
		dev_err(&client->dev, "write sensor default regs error\n");
		return ret;
		}

		ret = ov5647_set_virtual_channel(sd, 0);
		if (ret < 0)
		return ret;

		ret = ov5647_read(sd, 0x0100, &resetval);
		if (ret < 0)
		return ret;

		if (!(resetval & 0x01)) {
		dev_err(&client->dev, "Device was in SW standby");
		ret = ov5647_write(sd, 0x0100, 0x01);
		if (ret < 0)
		return ret;
		}

		return ov5647_write(sd, 0x4800, 0x04);
		}

		static int ov5647_sensor_power(struct v4l2_subdev *sd, int on)
		{
		int ret = 0;
		struct ov5647 *ov5647 = to_state(sd);
		struct i2c_client *client = v4l2_get_subdevdata(sd);

		mutex_lock(&ov5647->lock);

		if (on && !ov5647->power_count) {
		dev_dbg(&client->dev, "OV5647 power on\n");

		ret = clk_prepare_enable(ov5647->xclk);
		if (ret < 0) {
		dev_err(&client->dev, "clk prepare enable failed\n");
		goto out;
		}

		ret = ov5647_write_array(sd, sensor_oe_enable_regs,
		ARRAY_SIZE(sensor_oe_enable_regs));
		if (ret < 0) {
		clk_disable_unprepare(ov5647->xclk);
		dev_err(&client->dev,
		"write sensor_oe_enable_regs error\n");
		goto out;
		}

		ret = __sensor_init(sd);
		if (ret < 0) {
		clk_disable_unprepare(ov5647->xclk);
		dev_err(&client->dev,
		"Camera not available, check Power\n");
		goto out;
		}
		} else if (!on && ov5647->power_count == 1) {
		dev_dbg(&client->dev, "OV5647 power off\n");

		ret = ov5647_write_array(sd, sensor_oe_disable_regs,
		ARRAY_SIZE(sensor_oe_disable_regs));

		if (ret < 0)
		dev_dbg(&client->dev, "disable oe failed\n");

		ret = set_sw_standby(sd, true);

		if (ret < 0)
		dev_dbg(&client->dev, "soft stby failed\n");

		clk_disable_unprepare(ov5647->xclk);
		}

		/* Update the power count. */
		ov5647->power_count += on ? 1 : -1;
		WARN_ON(ov5647->power_count < 0);

		out:
		mutex_unlock(&ov5647->lock);

		return ret;
		}

		#ifdef CONFIG_VIDEO_ADV_DEBUG
		static int ov5647_sensor_get_register(struct v4l2_subdev *sd,
		struct v4l2_dbg_register *reg)
		{
		u8 val;
		int ret;

		ret = ov5647_read(sd, reg->reg & 0xff, &val);
		if (ret < 0)
		return ret;

		reg->val = val;
		reg->size = 1;

		return 0;
		}

		static int ov5647_sensor_set_register(struct v4l2_subdev *sd,
		const struct v4l2_dbg_register *reg)
		{
		return ov5647_write(sd, reg->reg & 0xff, reg->val & 0xff);
		}
		#endif

		/**
		* @short Subdev core operations registration
		*/
		static const struct v4l2_subdev_core_ops ov5647_subdev_core_ops = {
		.s_power = ov5647_sensor_power,
		#ifdef CONFIG_VIDEO_ADV_DEBUG
		.g_register = ov5647_sensor_get_register,
		.s_register = ov5647_sensor_set_register,
		#endif
		};

		static int ov5647_s_stream(struct v4l2_subdev *sd, int enable)
		{
		if (enable)
		return ov5647_stream_on(sd);
		else
		return ov5647_stream_off(sd);
		}

		static const struct v4l2_subdev_video_ops ov5647_subdev_video_ops = {
		.s_stream = ov5647_s_stream,
		};

		static int ov5647_enum_mbus_code(struct v4l2_subdev *sd,
		struct v4l2_subdev_pad_config *cfg,
		struct v4l2_subdev_mbus_code_enum *code)
		{
		if (code->index > 0)
		return -EINVAL;

		code->code = MEDIA_BUS_FMT_SBGGR8_1X8;

		return 0;
		}

		static const struct v4l2_subdev_pad_ops ov5647_subdev_pad_ops = {
		.enum_mbus_code = ov5647_enum_mbus_code,
		};

		static const struct v4l2_subdev_ops ov5647_subdev_ops = {
		.core = &ov5647_subdev_core_ops,
		.video = &ov5647_subdev_video_ops,
		.pad = &ov5647_subdev_pad_ops,
		};

		static int ov5647_detect(struct v4l2_subdev *sd)
		{
		u8 read;
		int ret;
		struct i2c_client *client = v4l2_get_subdevdata(sd);

		ret = ov5647_write(sd, OV5647_SW_RESET, 0x01);
		if (ret < 0)
		return ret;

		ret = ov5647_read(sd, OV5647_REG_CHIPID_H, &read);
		if (ret < 0)
		return ret;

		if (read != 0x56) {
		dev_err(&client->dev, "ID High expected 0x56 got %x", read);
		return -ENODEV;
		}

		ret = ov5647_read(sd, OV5647_REG_CHIPID_L, &read);
		if (ret < 0)
		return ret;

		if (read != 0x47) {
		dev_err(&client->dev, "ID Low expected 0x47 got %x", read);
		return -ENODEV;
		}

		return ov5647_write(sd, OV5647_SW_RESET, 0x00);
		}

		static int ov5647_open(struct v4l2_subdev sd, struct v4l2_subdev_fh fh)
		{
		struct v4l2_mbus_framefmt *format =
		v4l2_subdev_get_try_format(sd, fh->pad, 0);
		struct v4l2_rect *crop =
		v4l2_subdev_get_try_crop(sd, fh->pad, 0);

		crop->left = OV5647_COLUMN_START_DEF;
		crop->top = OV5647_ROW_START_DEF;
		crop->width = OV5647_WINDOW_WIDTH_DEF;
		crop->height = OV5647_WINDOW_HEIGHT_DEF;

		format->code = MEDIA_BUS_FMT_SBGGR8_1X8;

		format->width = OV5647_WINDOW_WIDTH_DEF;
		format->height = OV5647_WINDOW_HEIGHT_DEF;
		format->field = V4L2_FIELD_NONE;
		format->colorspace = V4L2_COLORSPACE_SRGB;

		return 0;
		}

		static const struct v4l2_subdev_internal_ops ov5647_subdev_internal_ops = {
		.open = ov5647_open,
		};

		static int ov5647_parse_dt(struct device_node *np)
		{
		struct v4l2_of_endpoint bus_cfg;
		struct device_node *ep;

		int ret;

		ep = of_graph_get_next_endpoint(np, NULL);
		if (!ep)
		return -EINVAL;

		ret = v4l2_of_parse_endpoint(ep, &bus_cfg);

		of_node_put(ep);
		return ret;
		}

		static int ov5647_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		struct device *dev = &client->dev;
		struct ov5647 *sensor;
		int ret;
		struct v4l2_subdev *sd;
		struct device_node *np = client->dev.of_node;
		u32 xclk_freq;

		sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
		if (!sensor)
		return -ENOMEM;

		if (IS_ENABLED(CONFIG_OF) && np) {
		ret = ov5647_parse_dt(np);
		if (ret) {
		dev_err(dev, "DT parsing error: %d\n", ret);
		return ret;
		}
		}

		/* get system clock (xclk) */
		sensor->xclk = devm_clk_get(dev, NULL);
		if (IS_ERR(sensor->xclk)) {
		dev_err(dev, "could not get xclk");
		return PTR_ERR(sensor->xclk);
		}

		xclk_freq = clk_get_rate(sensor->xclk);
		if (xclk_freq != 25000000) {
		dev_err(dev, "Unsupported clock frequency: %u\n", xclk_freq);
		return -EINVAL;
		}

		mutex_init(&sensor->lock);

		sd = &sensor->sd;
		v4l2_i2c_subdev_init(sd, client, &ov5647_subdev_ops);
		sensor->sd.internal_ops = &ov5647_subdev_internal_ops;
		sensor->sd.flags \|= V4L2_SUBDEV_FL_HAS_DEVNODE;

		sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
		sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
		ret = media_entity_pads_init(&sd->entity, 1, &sensor->pad);
		if (ret < 0)
		goto mutex_remove;

		ret = ov5647_detect(sd);
		if (ret < 0)
		goto error;

		ret = v4l2_async_register_subdev(sd);
		if (ret < 0)
		goto error;

		dev_dbg(dev, "OmniVision OV5647 camera driver probed\n");
		return 0;
		error:
		media_entity_cleanup(&sd->entity);
		mutex_remove:
		mutex_destroy(&sensor->lock);
		return ret;
		}

		static int ov5647_remove(struct i2c_client *client)
		{
		struct v4l2_subdev *sd = i2c_get_clientdata(client);
		struct ov5647 *ov5647 = to_state(sd);

		v4l2_async_unregister_subdev(&ov5647->sd);
		media_entity_cleanup(&ov5647->sd.entity);
		v4l2_device_unregister_subdev(sd);
		mutex_destroy(&ov5647->lock);

		return 0;
		}

		static const struct i2c_device_id ov5647_id[] = {
		{ "ov5647", 0 },
		{ }
		};
		MODULE_DEVICE_TABLE(i2c, ov5647_id);

		#if IS_ENABLED(CONFIG_OF)
		static const struct of_device_id ov5647_of_match[] = {
		{ .compatible = "ovti,ov5647" },
		{ /* sentinel */ },
		};
		MODULE_DEVICE_TABLE(of, ov5647_of_match);
		#endif

		static struct i2c_driver ov5647_driver = {
		.driver = {
		.of_match_table = of_match_ptr(ov5647_of_match),
		.name = SENSOR_NAME,
		},
		.probe = ov5647_probe,
		.remove = ov5647_remove,
		.id_table = ov5647_id,
		};

		module_i2c_driver(ov5647_driver);

		MODULE_AUTHOR("Ramiro Oliveira <roliveir@synopsys.com>");
		MODULE_DESCRIPTION("A low-level driver for OmniVision ov5647 sensors");
		MODULE_LICENSE("GPL v2");