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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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/version.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include "wis-i2c.h"
struct wis_ov7640 {
int brightness;
int contrast;
int saturation;
int hue;
};
static 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, 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 struct i2c_driver wis_ov7640_driver;
static struct i2c_client wis_ov7640_client_templ = {
.name = "OV7640 (WIS)",
.driver = &wis_ov7640_driver,
};
static int wis_ov7640_detect(struct i2c_adapter *adapter, int addr, int kind)
{
struct i2c_client *client;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return 0;
client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (client == NULL)
return -ENOMEM;
memcpy(client, &wis_ov7640_client_templ,
sizeof(wis_ov7640_client_templ));
client->adapter = adapter;
client->addr = addr;
client->flags = I2C_CLIENT_SCCB;
printk(KERN_DEBUG
"wis-ov7640: initializing OV7640 at address %d on %s\n",
addr, adapter->name);
if (write_regs(client, initial_registers) < 0) {
printk(KERN_ERR "wis-ov7640: error initializing OV7640\n");
kfree(client);
return 0;
}
i2c_attach_client(client);
return 0;
}
static int wis_ov7640_detach(struct i2c_client *client)
{
int r;
r = i2c_detach_client(client);
if (r < 0)
return r;
kfree(client);
return 0;
}
static struct i2c_driver wis_ov7640_driver = {
.driver = {
.name = "WIS OV7640 I2C driver",
},
.id = I2C_DRIVERID_WIS_OV7640,
.detach_client = wis_ov7640_detach,
};
static int __init wis_ov7640_init(void)
{
int r;
r = i2c_add_driver(&wis_ov7640_driver);
if (r < 0)
return r;
return wis_i2c_add_driver(wis_ov7640_driver.id, wis_ov7640_detect);
}
static void __exit wis_ov7640_cleanup(void)
{
wis_i2c_del_driver(wis_ov7640_detect);
i2c_del_driver(&wis_ov7640_driver);
}
module_init(wis_ov7640_init);
module_exit(wis_ov7640_cleanup);
MODULE_LICENSE("GPL v2");
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