1/* 2 * Copyright (C) 2005-2006 Micronas USA Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License (Version 2) as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program; if not, write to the Free Software Foundation, 15 * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. 16 */ 17 18#include <linux/module.h> 19#include <linux/init.h> 20#include <linux/i2c.h> 21#include <linux/videodev2.h> 22 23#include "wis-i2c.h" 24 25struct wis_ov7640 { 26 int brightness; 27 int contrast; 28 int saturation; 29 int hue; 30}; 31 32static u8 initial_registers[] = 33{ 34 0x12, 0x80, 35 0x12, 0x54, 36 0x14, 0x24, 37 0x15, 0x01, 38 0x28, 0x20, 39 0x75, 0x82, 40 0xFF, 0xFF, /* Terminator (reg 0xFF is unused) */ 41}; 42 43static int write_regs(struct i2c_client *client, u8 *regs) 44{ 45 int i; 46 47 for (i = 0; regs[i] != 0xFF; i += 2) 48 if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0) 49 return -1; 50 return 0; 51} 52 53static int wis_ov7640_probe(struct i2c_client *client, 54 const struct i2c_device_id *id) 55{ 56 struct i2c_adapter *adapter = client->adapter; 57 58 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 59 return -ENODEV; 60 61 client->flags = I2C_CLIENT_SCCB; 62 63 printk(KERN_DEBUG 64 "wis-ov7640: initializing OV7640 at address %d on %s\n", 65 client->addr, adapter->name); 66 67 if (write_regs(client, initial_registers) < 0) { 68 printk(KERN_ERR "wis-ov7640: error initializing OV7640\n"); 69 return -ENODEV; 70 } 71 72 return 0; 73} 74 75static int wis_ov7640_remove(struct i2c_client *client) 76{ 77 return 0; 78} 79 80static const struct i2c_device_id wis_ov7640_id[] = { 81 { "wis_ov7640", 0 }, 82 { } 83}; 84 85static struct i2c_driver wis_ov7640_driver = { 86 .driver = { 87 .name = "WIS OV7640 I2C driver", 88 }, 89 .probe = wis_ov7640_probe, 90 .remove = wis_ov7640_remove, 91 .id_table = wis_ov7640_id, 92}; 93 94static int __init wis_ov7640_init(void) 95{ 96 return i2c_add_driver(&wis_ov7640_driver); 97} 98 99static void __exit wis_ov7640_cleanup(void) 100{ 101 i2c_del_driver(&wis_ov7640_driver); 102} 103 104module_init(wis_ov7640_init); 105module_exit(wis_ov7640_cleanup); 106 107MODULE_LICENSE("GPL v2"); 108