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91 lines
1.9 KiB
91 lines
1.9 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2005-2006 Micronas USA Inc. |
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*/ |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/i2c.h> |
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#include <linux/videodev2.h> |
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#include <media/v4l2-device.h> |
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#include <linux/slab.h> |
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MODULE_DESCRIPTION("OmniVision ov7640 sensor driver"); |
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MODULE_LICENSE("GPL v2"); |
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static const u8 initial_registers[] = { |
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0x12, 0x80, |
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0x12, 0x54, |
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0x14, 0x24, |
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0x15, 0x01, |
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0x28, 0x20, |
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0x75, 0x82, |
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0xFF, 0xFF, /* Terminator (reg 0xFF is unused) */ |
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}; |
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static int write_regs(struct i2c_client *client, const u8 *regs) |
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{ |
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int i; |
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for (i = 0; regs[i] != 0xFF; i += 2) |
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if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0) |
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return -1; |
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return 0; |
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} |
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/* ----------------------------------------------------------------------- */ |
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static const struct v4l2_subdev_ops ov7640_ops; |
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static int ov7640_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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struct i2c_adapter *adapter = client->adapter; |
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struct v4l2_subdev *sd; |
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
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return -ENODEV; |
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sd = devm_kzalloc(&client->dev, sizeof(*sd), GFP_KERNEL); |
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if (sd == NULL) |
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return -ENOMEM; |
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v4l2_i2c_subdev_init(sd, client, &ov7640_ops); |
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client->flags = I2C_CLIENT_SCCB; |
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v4l_info(client, "chip found @ 0x%02x (%s)\n", |
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client->addr << 1, client->adapter->name); |
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if (write_regs(client, initial_registers) < 0) { |
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v4l_err(client, "error initializing OV7640\n"); |
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return -ENODEV; |
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} |
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return 0; |
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} |
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static int ov7640_remove(struct i2c_client *client) |
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{ |
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struct v4l2_subdev *sd = i2c_get_clientdata(client); |
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v4l2_device_unregister_subdev(sd); |
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return 0; |
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} |
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static const struct i2c_device_id ov7640_id[] = { |
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{ "ov7640", 0 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, ov7640_id); |
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static struct i2c_driver ov7640_driver = { |
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.driver = { |
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.name = "ov7640", |
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}, |
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.probe = ov7640_probe, |
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.remove = ov7640_remove, |
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.id_table = ov7640_id, |
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}; |
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module_i2c_driver(ov7640_driver);
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