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Commit ec367c3c authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
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[media] ov7640: add new ov7640 driver 



This based on the wis-ov7640.c driver that's part of the go7007 driver.
It has been converted to a v4l subdev driver by Pete Eberlein, and I made
additional cleanups.
Based on work by: Pete Eberlein <pete@sensoray.com>

Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent c7c54a98

drivers/media/i2c/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -395,6 +395,17 @@ config VIDEO_APTINA_PLL 
config VIDEO_SMIAPP_PLL

	tristate



config VIDEO_OV7640

	tristate "OmniVision OV7640 sensor support"

	depends on I2C && VIDEO_V4L2

	depends on MEDIA_CAMERA_SUPPORT

	---help---

	  This is a Video4Linux2 sensor-level driver for the OmniVision

	  OV7640 camera.



	  To compile this driver as a module, choose M here: the

	  module will be called ov7640.



config VIDEO_OV7670

	tristate "OmniVision OV7670 sensor support"

	depends on I2C && VIDEO_V4L2

drivers/media/i2c/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ obj-$(CONFIG_VIDEO_VP27SMPX) += vp27smpx.o 
obj-$(CONFIG_VIDEO_SONY_BTF_MPX) += sony-btf-mpx.o

obj-$(CONFIG_VIDEO_UPD64031A) += upd64031a.o

obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o

obj-$(CONFIG_VIDEO_OV7640) += ov7640.o

obj-$(CONFIG_VIDEO_OV7670) += ov7670.o

obj-$(CONFIG_VIDEO_OV9650) += ov9650.o

obj-$(CONFIG_VIDEO_TCM825X) += tcm825x.o

drivers/media/i2c/ov7640.c

0 → 100644
+106 −0
Original line number Diff line number Diff line 
/*

 * 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/init.h>

#include <linux/module.h>

#include <linux/i2c.h>

#include <linux/videodev2.h>

#include <media/v4l2-device.h>

#include <media/v4l2-chip-ident.h>

#include <linux/slab.h>



MODULE_DESCRIPTION("OmniVision ov7640 sensor driver");

MODULE_LICENSE("GPL v2");



static const 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, const 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 const struct v4l2_subdev_ops ov7640_ops;



static int ov7640_probe(struct i2c_client *client,

			const struct i2c_device_id *id)

{

	struct i2c_adapter *adapter = client->adapter;

	struct v4l2_subdev *sd;



	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))

		return -ENODEV;



	sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);

	if (sd == NULL)

		return -ENOMEM;

	v4l2_i2c_subdev_init(sd, client, &ov7640_ops);



	client->flags = I2C_CLIENT_SCCB;



	v4l_info(client, "chip found @ 0x%02x (%s)\n",

			client->addr << 1, client->adapter->name);



	if (write_regs(client, initial_registers) < 0) {

		v4l_err(client, "error initializing OV7640\n");

		kfree(sd);

		return -ENODEV;

	}



	return 0;

}





static int ov7640_remove(struct i2c_client *client)

{

	struct v4l2_subdev *sd = i2c_get_clientdata(client);



	v4l2_device_unregister_subdev(sd);

	kfree(sd);

	return 0;

}



static const struct i2c_device_id ov7640_id[] = {

	{ "ov7640", 0 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, ov7640_id);



static struct i2c_driver ov7640_driver = {

	.driver = {

		.owner	= THIS_MODULE,

		.name	= "ov7640",

	},

	.probe = ov7640_probe,

	.remove = ov7640_remove,

	.id_table = ov7640_id,

};

module_i2c_driver(ov7640_driver);