95 lines
1.9 KiB
C
95 lines
1.9 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2005-2006 Micronas USA Inc.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/i2c.h>
|
||
|
|
#include <linux/videodev2.h>
|
||
|
|
#include <media/v4l2-device.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("OmniVision ov7640 sensor driver");
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
|
||
|
|
struct reg_val {
|
||
|
|
u8 reg;
|
||
|
|
u8 val;
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct reg_val regval_init[] = {
|
||
|
|
{0x12, 0x80},
|
||
|
|
{0x12, 0x54},
|
||
|
|
{0x14, 0x24},
|
||
|
|
{0x15, 0x01},
|
||
|
|
{0x28, 0x20},
|
||
|
|
{0x75, 0x82},
|
||
|
|
};
|
||
|
|
|
||
|
|
static int write_regs(struct i2c_client *client,
|
||
|
|
const struct reg_val *rv, int len)
|
||
|
|
{
|
||
|
|
while (--len >= 0) {
|
||
|
|
if (i2c_smbus_write_byte_data(client, rv->reg, rv->val) < 0)
|
||
|
|
return -1;
|
||
|
|
rv++;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ----------------------------------------------------------------------- */
|
||
|
|
|
||
|
|
static const struct v4l2_subdev_ops ov7640_ops;
|
||
|
|
|
||
|
|
static int ov7640_probe(struct i2c_client *client,
|
||
|
|
const struct i2c_device_id *id)
|
||
|
|
{
|
||
|
|
struct i2c_adapter *adapter = client->adapter;
|
||
|
|
struct v4l2_subdev *sd;
|
||
|
|
|
||
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
sd = devm_kzalloc(&client->dev, sizeof(*sd), GFP_KERNEL);
|
||
|
|
if (sd == NULL)
|
||
|
|
return -ENOMEM;
|
||
|
|
v4l2_i2c_subdev_init(sd, client, &ov7640_ops);
|
||
|
|
|
||
|
|
client->flags = I2C_CLIENT_SCCB;
|
||
|
|
|
||
|
|
v4l_info(client, "chip found @ 0x%02x (%s)\n",
|
||
|
|
client->addr << 1, client->adapter->name);
|
||
|
|
|
||
|
|
if (write_regs(client, regval_init, ARRAY_SIZE(regval_init)) < 0) {
|
||
|
|
v4l_err(client, "error initializing OV7640\n");
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static void ov7640_remove(struct i2c_client *client)
|
||
|
|
{
|
||
|
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
||
|
|
|
||
|
|
v4l2_device_unregister_subdev(sd);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct i2c_device_id ov7640_id[] = {
|
||
|
|
{ "ov7640", 0 },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(i2c, ov7640_id);
|
||
|
|
|
||
|
|
static struct i2c_driver ov7640_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "ov7640",
|
||
|
|
},
|
||
|
|
.probe = ov7640_probe,
|
||
|
|
.remove = ov7640_remove,
|
||
|
|
.id_table = ov7640_id,
|
||
|
|
};
|
||
|
|
module_i2c_driver(ov7640_driver);
|