Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 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> |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 20 | #include <linux/i2c.h> |
Ross Cohen | df20d69 | 2008-09-29 22:36:24 -0400 | [diff] [blame] | 21 | #include <linux/videodev2.h> |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 22 | |
| 23 | #include "wis-i2c.h" |
| 24 | |
| 25 | struct wis_ov7640 { |
| 26 | int brightness; |
| 27 | int contrast; |
| 28 | int saturation; |
| 29 | int hue; |
| 30 | }; |
| 31 | |
| 32 | static 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 | |
| 43 | static 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 | |
Jean Delvare | 7400516 | 2009-04-21 21:47:22 +0200 | [diff] [blame] | 53 | static int wis_ov7640_probe(struct i2c_client *client, |
| 54 | const struct i2c_device_id *id) |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 55 | { |
Jean Delvare | 7400516 | 2009-04-21 21:47:22 +0200 | [diff] [blame] | 56 | struct i2c_adapter *adapter = client->adapter; |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 57 | |
| 58 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
Jean Delvare | 7400516 | 2009-04-21 21:47:22 +0200 | [diff] [blame] | 59 | return -ENODEV; |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 60 | |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 61 | client->flags = I2C_CLIENT_SCCB; |
| 62 | |
| 63 | printk(KERN_DEBUG |
| 64 | "wis-ov7640: initializing OV7640 at address %d on %s\n", |
Jean Delvare | 7400516 | 2009-04-21 21:47:22 +0200 | [diff] [blame] | 65 | client->addr, adapter->name); |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 66 | |
| 67 | if (write_regs(client, initial_registers) < 0) { |
| 68 | printk(KERN_ERR "wis-ov7640: error initializing OV7640\n"); |
Jean Delvare | 7400516 | 2009-04-21 21:47:22 +0200 | [diff] [blame] | 69 | return -ENODEV; |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 70 | } |
| 71 | |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 72 | return 0; |
| 73 | } |
| 74 | |
Jean Delvare | 7400516 | 2009-04-21 21:47:22 +0200 | [diff] [blame] | 75 | static int wis_ov7640_remove(struct i2c_client *client) |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 76 | { |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 77 | return 0; |
| 78 | } |
| 79 | |
Jean Delvare | 7400516 | 2009-04-21 21:47:22 +0200 | [diff] [blame] | 80 | static struct i2c_device_id wis_ov7640_id[] = { |
| 81 | { "wis_ov7640", 0 }, |
| 82 | { } |
| 83 | }; |
| 84 | |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 85 | static struct i2c_driver wis_ov7640_driver = { |
| 86 | .driver = { |
| 87 | .name = "WIS OV7640 I2C driver", |
| 88 | }, |
Jean Delvare | 7400516 | 2009-04-21 21:47:22 +0200 | [diff] [blame] | 89 | .probe = wis_ov7640_probe, |
| 90 | .remove = wis_ov7640_remove, |
| 91 | .id_table = wis_ov7640_id, |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 92 | }; |
| 93 | |
| 94 | static int __init wis_ov7640_init(void) |
| 95 | { |
Jean Delvare | 7400516 | 2009-04-21 21:47:22 +0200 | [diff] [blame] | 96 | return i2c_add_driver(&wis_ov7640_driver); |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | static void __exit wis_ov7640_cleanup(void) |
| 100 | { |
Greg Kroah-Hartman | 866b869 | 2008-02-15 16:53:09 -0800 | [diff] [blame] | 101 | i2c_del_driver(&wis_ov7640_driver); |
| 102 | } |
| 103 | |
| 104 | module_init(wis_ov7640_init); |
| 105 | module_exit(wis_ov7640_cleanup); |
| 106 | |
| 107 | MODULE_LICENSE("GPL v2"); |