| /* |
| * 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/of_graph.h> |
| #include <linux/slab.h> |
| #include <linux/videodev2.h> |
| #include <media/v4l2-device.h> |
| #include <media/v4l2-fwnode.h> |
| #include <media/v4l2-image-sizes.h> |
| #include <media/v4l2-mediabus.h> |
| |
| #define SENSOR_NAME "ov5647" |
| |
| #define MIPI_CTRL00_CLOCK_LANE_GATE BIT(5) |
| #define MIPI_CTRL00_BUS_IDLE BIT(2) |
| #define MIPI_CTRL00_CLOCK_LANE_DISABLE BIT(0) |
| |
| #define OV5647_SW_STANDBY 0x0100 |
| #define OV5647_SW_RESET 0x0103 |
| #define OV5647_REG_CHIPID_H 0x300A |
| #define OV5647_REG_CHIPID_L 0x300B |
| #define OV5640_REG_PAD_OUT 0x300D |
| #define OV5647_REG_FRAME_OFF_NUMBER 0x4202 |
| #define OV5647_REG_MIPI_CTRL00 0x4800 |
| #define OV5647_REG_MIPI_CTRL14 0x4814 |
| |
| #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, OV5647_REG_MIPI_CTRL14, &channel_id); |
| if (ret < 0) |
| return ret; |
| |
| channel_id &= ~(3 << 6); |
| return ov5647_write(sd, OV5647_REG_MIPI_CTRL14, channel_id | (channel << 6)); |
| } |
| |
| static int ov5647_stream_on(struct v4l2_subdev *sd) |
| { |
| int ret; |
| |
| ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, MIPI_CTRL00_BUS_IDLE); |
| if (ret < 0) |
| return ret; |
| |
| ret = ov5647_write(sd, OV5647_REG_FRAME_OFF_NUMBER, 0x00); |
| if (ret < 0) |
| return ret; |
| |
| return ov5647_write(sd, OV5640_REG_PAD_OUT, 0x00); |
| } |
| |
| static int ov5647_stream_off(struct v4l2_subdev *sd) |
| { |
| int ret; |
| |
| ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, MIPI_CTRL00_CLOCK_LANE_GATE |
| | MIPI_CTRL00_BUS_IDLE | MIPI_CTRL00_CLOCK_LANE_DISABLE); |
| if (ret < 0) |
| return ret; |
| |
| ret = ov5647_write(sd, OV5647_REG_FRAME_OFF_NUMBER, 0x0f); |
| if (ret < 0) |
| return ret; |
| |
| return ov5647_write(sd, OV5640_REG_PAD_OUT, 0x01); |
| } |
| |
| static int set_sw_standby(struct v4l2_subdev *sd, bool standby) |
| { |
| int ret; |
| u8 rdval; |
| |
| ret = ov5647_read(sd, OV5647_SW_STANDBY, &rdval); |
| if (ret < 0) |
| return ret; |
| |
| if (standby) |
| rdval &= ~0x01; |
| else |
| rdval |= 0x01; |
| |
| return ov5647_write(sd, OV5647_SW_STANDBY, 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, OV5647_SW_STANDBY, &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, OV5647_SW_STANDBY, &resetval); |
| if (ret < 0) |
| return ret; |
| |
| if (!(resetval & 0x01)) { |
| dev_err(&client->dev, "Device was in SW standby"); |
| ret = ov5647_write(sd, OV5647_SW_STANDBY, 0x01); |
| if (ret < 0) |
| return ret; |
| } |
| |
| /* |
| * stream off to make the clock lane into LP-11 state. |
| */ |
| return ov5647_stream_off(sd); |
| } |
| |
| 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_fwnode_endpoint bus_cfg; |
| struct device_node *ep; |
| |
| int ret; |
| |
| ep = of_graph_get_next_endpoint(np, NULL); |
| if (!ep) |
| return -EINVAL; |
| |
| ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(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"); |