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/* * Copyright (C) 2005-2006 Micronas USA Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License (Version 2) as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #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"); static const u8 initial_registers[] = { 0x12, 0x80, 0x12, 0x54, 0x14, 0x24, 0x15, 0x01, 0x28, 0x20, 0x75, 0x82, 0xFF, 0xFF, /* Terminator (reg 0xFF is unused) */ }; static int write_regs(struct i2c_client *client, const u8 *regs) { int i; for (i = 0; regs[i] != 0xFF; i += 2) if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0) return -1; 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, initial_registers) < 0) { v4l_err(client, "error initializing OV7640\n"); return -ENODEV; } return 0; } static int ov7640_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); v4l2_device_unregister_subdev(sd); return 0; } 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);