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866b8695 GKH |
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> | |
866b8695 | 20 | #include <linux/i2c.h> |
df20d69e | 21 | #include <linux/videodev2.h> |
866b8695 GKH |
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 | ||
7400516a JD |
53 | static int wis_ov7640_probe(struct i2c_client *client, |
54 | const struct i2c_device_id *id) | |
866b8695 | 55 | { |
7400516a | 56 | struct i2c_adapter *adapter = client->adapter; |
866b8695 GKH |
57 | |
58 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
7400516a JD |
59 | return -ENODEV; |
60 | ||
866b8695 GKH |
61 | client->flags = I2C_CLIENT_SCCB; |
62 | ||
63 | printk(KERN_DEBUG | |
64 | "wis-ov7640: initializing OV7640 at address %d on %s\n", | |
7400516a | 65 | client->addr, adapter->name); |
866b8695 GKH |
66 | |
67 | if (write_regs(client, initial_registers) < 0) { | |
68 | printk(KERN_ERR "wis-ov7640: error initializing OV7640\n"); | |
7400516a | 69 | return -ENODEV; |
866b8695 GKH |
70 | } |
71 | ||
866b8695 GKH |
72 | return 0; |
73 | } | |
74 | ||
7400516a | 75 | static int wis_ov7640_remove(struct i2c_client *client) |
866b8695 | 76 | { |
866b8695 GKH |
77 | return 0; |
78 | } | |
79 | ||
b76a3263 | 80 | static const struct i2c_device_id wis_ov7640_id[] = { |
7400516a JD |
81 | { "wis_ov7640", 0 }, |
82 | { } | |
83 | }; | |
3946b4a5 | 84 | MODULE_DEVICE_TABLE(i2c, wis_ov7640_id); |
7400516a | 85 | |
866b8695 GKH |
86 | static struct i2c_driver wis_ov7640_driver = { |
87 | .driver = { | |
88 | .name = "WIS OV7640 I2C driver", | |
89 | }, | |
7400516a JD |
90 | .probe = wis_ov7640_probe, |
91 | .remove = wis_ov7640_remove, | |
92 | .id_table = wis_ov7640_id, | |
866b8695 GKH |
93 | }; |
94 | ||
95 | static int __init wis_ov7640_init(void) | |
96 | { | |
7400516a | 97 | return i2c_add_driver(&wis_ov7640_driver); |
866b8695 GKH |
98 | } |
99 | ||
100 | static void __exit wis_ov7640_cleanup(void) | |
101 | { | |
866b8695 GKH |
102 | i2c_del_driver(&wis_ov7640_driver); |
103 | } | |
104 | ||
105 | module_init(wis_ov7640_init); | |
106 | module_exit(wis_ov7640_cleanup); | |
107 | ||
108 | MODULE_LICENSE("GPL v2"); |