cregit-Linux how code gets into the kernel

Release 4.13 drivers/media/i2c/ov5647.c

/*
 * 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 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); }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira25100.00%1100.00%
Total25100.00%1100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira83100.00%1100.00%
Total83100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira118100.00%1100.00%
Total118100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira72100.00%1100.00%
Total72100.00%1100.00%


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)); }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira66100.00%1100.00%
Total66100.00%1100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira44100.00%1100.00%
Total44100.00%1100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira44100.00%1100.00%
Total44100.00%1100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira65100.00%1100.00%
Total65100.00%1100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira175100.00%1100.00%
Total175100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira295100.00%1100.00%
Total295100.00%1100.00%

#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; }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira62100.00%1100.00%
Total62100.00%1100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira35100.00%1100.00%
Total35100.00%1100.00%

#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); }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira31100.00%1100.00%
Total31100.00%1100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira42100.00%1100.00%
Total42100.00%1100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira147100.00%1100.00%
Total147100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira105100.00%1100.00%
Total105100.00%1100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira5791.94%150.00%
Sakari Ailus58.06%150.00%
Total62100.00%2100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira331100.00%1100.00%
Total331100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira65100.00%1100.00%
Total65100.00%1100.00%

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");

Overall Contributors

PersonTokensPropCommitsCommitProp
Ramiro Oliveira284399.61%150.00%
Sakari Ailus110.39%150.00%
Total2854100.00%2100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.