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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/media/i2c/ov7640.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/media/i2c/ov7640.c')
-rw-r--r-- | drivers/media/i2c/ov7640.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/media/i2c/ov7640.c b/drivers/media/i2c/ov7640.c new file mode 100644 index 0000000000..293f5f4043 --- /dev/null +++ b/drivers/media/i2c/ov7640.c @@ -0,0 +1,93 @@ +// 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) +{ + 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); |