[net-next-2.6.git] / drivers / staging / go7007 / wis-ov7640.c

/*
 * 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/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");
Commit	Line	Data
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
	53	static struct i2c_driver wis_ov7640_driver;
	54
	55	static struct i2c_client wis_ov7640_client_templ = {
	56	.name = "OV7640 (WIS)",
	57	.driver = &wis_ov7640_driver,
	58	};
	59
	60	static int wis_ov7640_detect(struct i2c_adapter *adapter, int addr, int kind)
	61	{
	62	struct i2c_client *client;
	63
	64	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	65	return 0;
	66
	67	client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
	68	if (client == NULL)
	69	return -ENOMEM;
	70	memcpy(client, &wis_ov7640_client_templ,
	71	sizeof(wis_ov7640_client_templ));
	72	client->adapter = adapter;
	73	client->addr = addr;
	74	client->flags = I2C_CLIENT_SCCB;
	75
	76	printk(KERN_DEBUG
	77	"wis-ov7640: initializing OV7640 at address %d on %s\n",
	78	addr, adapter->name);
	79
	80	if (write_regs(client, initial_registers) < 0) {
	81	printk(KERN_ERR "wis-ov7640: error initializing OV7640\n");
	82	kfree(client);
	83	return 0;
	84	}
	85
86	i2c_attach_client(client);
87	return 0;
88	}
89
90	static int wis_ov7640_detach(struct i2c_client *client)
91	{
92	int r;
93
94	r = i2c_detach_client(client);
95	if (r < 0)
96	return r;
97
98	kfree(client);
99	return 0;
100	}
101
102	static struct i2c_driver wis_ov7640_driver = {
103	.driver = {
104	.name = "WIS OV7640 I2C driver",
105	},
106	.id = I2C_DRIVERID_WIS_OV7640,
107	.detach_client = wis_ov7640_detach,
108	};
109
110	static int __init wis_ov7640_init(void)
111	{
112	int r;
113
114	r = i2c_add_driver(&wis_ov7640_driver);
115	if (r < 0)
116	return r;
117	return wis_i2c_add_driver(wis_ov7640_driver.id, wis_ov7640_detect);
118	}
119
120	static void __exit wis_ov7640_cleanup(void)
121	{
122	wis_i2c_del_driver(wis_ov7640_detect);
123	i2c_del_driver(&wis_ov7640_driver);
124	}
125
126	module_init(wis_ov7640_init);
127	module_exit(wis_ov7640_cleanup);
128
129	MODULE_LICENSE("GPL v2");