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kernel/drivers/media/i2c/ov5647.c
Sakari Ailus 60359a28d5 media: v4l: fwnode: Initialise the V4L2 fwnode endpoints to zero 
Initialise the V4L2 fwnode endpoints to zero in all drivers using
v4l2_fwnode_endpoint_parse(). This prepares for setting default endpoint
flags as well as the bus type. Setting bus type to zero will continue to
guess the bus among the guessable set (parallel, Bt.656 and CSI-2 D-PHY).

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Tested-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-10-04 16:21:02 -04:00

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/*
* 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
/*
* 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 = { .bus_type = 0 };
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");
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