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Commit 7dfba00d authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
Browse files

V4L/DVB (12135): Add a driver for mt9v011 sensor 

Adds driver for mt9v011 based on its datasheet, available at:
	http://download.micron.com/pdf/datasheets/imaging/MT9V011.pdf



The driver was tested with a webcam that will be added on a next patch.

Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent b179bc45

drivers/media/video/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -312,6 +312,14 @@ config VIDEO_OV7670 
	  OV7670 VGA camera.  It currently only works with the M88ALP01

	  controller.



config VIDEO_MT9V011

	tristate "Micron mt9v011 sensor support"

	depends on I2C && VIDEO_V4L2

	---help---

	  This is a Video4Linux2 sensor-level driver for the Micron

	  mt0v011 1.3 Mpixel camera.  It currently only works with the

	  em28xx driver.



config VIDEO_TCM825X

	tristate "TCM825x camera sensor support"

	depends on I2C && VIDEO_V4L2

drivers/media/video/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -69,6 +69,7 @@ obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o 
obj-$(CONFIG_VIDEO_OV7670) 	+= ov7670.o

obj-$(CONFIG_VIDEO_TCM825X) += tcm825x.o

obj-$(CONFIG_VIDEO_TVEEPROM) += tveeprom.o

obj-$(CONFIG_VIDEO_MT9V011) += mt9v011.o



obj-$(CONFIG_SOC_CAMERA_MT9M001)	+= mt9m001.o

obj-$(CONFIG_SOC_CAMERA_MT9M111)	+= mt9m111.o

drivers/media/video/mt9v011.c

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/*

 * mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor

 *

 * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com)

 * This code is placed under the terms of the GNU General Public License v2

 */



#include <linux/i2c.h>

#include <linux/videodev2.h>

#include <linux/delay.h>

#include <media/v4l2-device.h>

#include "mt9v011.h"

#include <media/v4l2-i2c-drv.h>

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



MODULE_DESCRIPTION("Micron mt9v011 sensor driver");

MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");

MODULE_LICENSE("GPL");





static int debug;

module_param(debug, int, 0);

MODULE_PARM_DESC(debug, "Debug level (0-2)");



/* supported controls */

static struct v4l2_queryctrl mt9v011_qctrl[] = {

	{

		.id = V4L2_CID_GAIN,

		.type = V4L2_CTRL_TYPE_INTEGER,

		.name = "Gain",

		.minimum = 0,

		.maximum = (1 << 10) - 1,

		.step = 1,

		.default_value = 0x0020,

		.flags = 0,

	}, {

		.id = V4L2_CID_RED_BALANCE,

		.type = V4L2_CTRL_TYPE_INTEGER,

		.name = "Red Balance",

		.minimum = -1 << 9,

		.maximum = (1 << 9) - 1,

		.step = 1,

		.default_value = 0,

		.flags = 0,

	}, {

		.id = V4L2_CID_BLUE_BALANCE,

		.type = V4L2_CTRL_TYPE_INTEGER,

		.name = "Blue Balance",

		.minimum = -1 << 9,

		.maximum = (1 << 9) - 1,

		.step = 1,

		.default_value = 0,

		.flags = 0,

	},

};



struct mt9v011 {

	struct v4l2_subdev sd;



	u16 global_gain, red_bal, blue_bal;

};



static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd)

{

	return container_of(sd, struct mt9v011, sd);

}



static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)

{

	struct i2c_client *c = v4l2_get_subdevdata(sd);

	__be16 buffer;

	int rc, val;



	if (1 != (rc = i2c_master_send(c, &addr, 1)))

		v4l2_dbg(0, debug, sd,

			 "i2c i/o error: rc == %d (should be 1)\n", rc);



	msleep(10);



	if (2 != (rc = i2c_master_recv(c, (char *)&buffer, 2)))

		v4l2_dbg(0, debug, sd,

			 "i2c i/o error: rc == %d (should be 1)\n", rc);



	val = be16_to_cpu(buffer);



	v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);



	return val;

}



static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,

				 u16 value)

{

	struct i2c_client *c = v4l2_get_subdevdata(sd);

	unsigned char buffer[3];

	int rc;



	buffer[0] = addr;

	buffer[1] = value >> 8;

	buffer[2] = value & 0xff;



	v4l2_dbg(2, debug, sd,

		 "mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);

	if (3 != (rc = i2c_master_send(c, buffer, 3)))

		v4l2_dbg(0, debug, sd,

			 "i2c i/o error: rc == %d (should be 3)\n", rc);

}





struct i2c_reg_value {

	unsigned char reg;

	u16           value;

};



/*

 * Values used at the original driver

 * Some values are marked as Reserved at the datasheet

 */

static const struct i2c_reg_value mt9v011_init_default[] = {

					/* guessed meaning - as mt9m111 */

		{ R0D_MT9V011_RESET, 0x0001 },

		{ R0D_MT9V011_RESET, 0x0000 },

		{ R01_MT9V011_ROWSTART, 0x0008 },

		{ R02_MT9V011_COLSTART, 0x0014 },

		{ R03_MT9V011_HEIGHT, 0x01e0 },

		{ R04_MT9V011_WIDTH, 0x0280 },

		{ R05_MT9V011_HBLANK, 0x0001 },

		{ R05_MT9V011_HBLANK, 0x0001 },

		{ R0A_MT9V011_CLK_SPEED, 0x0000 },

		{ R05_MT9V011_HBLANK, 0x000a },

		{ 0x30, 0x0005 },

		{ 0x34, 0x0100 },

		{ 0x3d, 0x068f },

		{ 0x40, 0x01e0 },

		{ 0x52, 0x0100 },

		{ 0x58, 0x0038 },	/* Datasheet default 0x0078 */

		{ 0x59, 0x0723 },	/* Datasheet default 0x0703 */

		{ 0x62, 0x041a },	/* Datasheet default 0x0418 */

		{ R09_MT9V011_SHUTTER_WIDTH, 0x0418 },

		{ R20_MT9V011_READ_MODE, 0x1100 },

};



static void set_balance(struct v4l2_subdev *sd)

{

	struct mt9v011 *core = to_mt9v011(sd);

	u16 green1_gain, green2_gain, blue_gain, red_gain;



	green1_gain = core->global_gain;

	green2_gain = core->global_gain;



	blue_gain = core->global_gain +

		    core->global_gain * core->blue_bal / (1 << 9);



	red_gain = core->global_gain +

		   core->global_gain * core->blue_bal / (1 << 9);



	mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain);

	mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN,  green1_gain);

	mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);

	mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);

}



static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)

{

	u16 version;

	int i;



	version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);



	if (version != MT9V011_VERSION) {

		v4l2_info(sd, "*** unknown micron chip detected (0x%04x.\n",

			  version);

		return -EINVAL;



	}



	for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)

		mt9v011_write(sd, mt9v011_init_default[i].reg,

			       mt9v011_init_default[i].value);



	set_balance(sd);



	return 0;

};



static int mt9v011_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)

{

	struct mt9v011 *core = to_mt9v011(sd);



	v4l2_dbg(1, debug, sd, "g_ctrl called\n");



	switch (ctrl->id) {

	case V4L2_CID_GAIN:

		ctrl->value = core->global_gain;

		return 0;

	case V4L2_CID_RED_BALANCE:

		ctrl->value = core->red_bal;

		return 0;

	case V4L2_CID_BLUE_BALANCE:

		ctrl->value = core->blue_bal;

		return 0;

	}

	return -EINVAL;

}



static int mt9v011_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)

{

	struct mt9v011 *core = to_mt9v011(sd);

	u8 i, n;

	n = ARRAY_SIZE(mt9v011_qctrl);



	for (i = 0; i < n; i++) {

		if (ctrl->id != mt9v011_qctrl[i].id)

			continue;

		if (ctrl->value < mt9v011_qctrl[i].minimum ||

		    ctrl->value > mt9v011_qctrl[i].maximum)

			return -ERANGE;

		v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n",

					ctrl->id, ctrl->value);

		break;

	}



	switch (ctrl->id) {

	case V4L2_CID_GAIN:

		core->global_gain = ctrl->value;

		break;

	case V4L2_CID_RED_BALANCE:

		core->red_bal = ctrl->value;

		break;

	case V4L2_CID_BLUE_BALANCE:

		core->blue_bal = ctrl->value;

		break;

	default:

		return -EINVAL;

	}



	set_balance(sd);



	return 0;

}



#ifdef CONFIG_VIDEO_ADV_DEBUG

static int mt9v011_g_register(struct v4l2_subdev *sd,

			      struct v4l2_dbg_register *reg)

{

	struct i2c_client *client = v4l2_get_subdevdata(sd);



	if (!v4l2_chip_match_i2c_client(client, &reg->match))

		return -EINVAL;

	if (!capable(CAP_SYS_ADMIN))

		return -EPERM;



	reg->val = mt9v011_read(sd, reg->reg & 0xff);

	reg->size = 2;



	return 0;

}



static int mt9v011_s_register(struct v4l2_subdev *sd,

			      struct v4l2_dbg_register *reg)

{

	struct i2c_client *client = v4l2_get_subdevdata(sd);



	if (!v4l2_chip_match_i2c_client(client, &reg->match))

		return -EINVAL;

	if (!capable(CAP_SYS_ADMIN))

		return -EPERM;



	mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);



	return 0;

}

#endif



static int mt9v011_g_chip_ident(struct v4l2_subdev *sd,

				struct v4l2_dbg_chip_ident *chip)

{

	struct i2c_client *client = v4l2_get_subdevdata(sd);



	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011,

					  MT9V011_VERSION);

}



static const struct v4l2_subdev_core_ops mt9v011_core_ops = {

	.g_ctrl = mt9v011_g_ctrl,

	.s_ctrl = mt9v011_s_ctrl,

	.reset = mt9v011_reset,

	.g_chip_ident = mt9v011_g_chip_ident,

#ifdef CONFIG_VIDEO_ADV_DEBUG

	.g_register = mt9v011_g_register,

	.s_register = mt9v011_s_register,

#endif

};



static const struct v4l2_subdev_ops mt9v011_ops = {

	.core = &mt9v011_core_ops,

};





/****************************************************************************

			I2C Client & Driver

 ****************************************************************************/



static int mt9v011_probe(struct i2c_client *c,

			 const struct i2c_device_id *id)

{

	struct mt9v011 *core;

	struct v4l2_subdev *sd;



	/* Check if the adapter supports the needed features */

	if (!i2c_check_functionality(c->adapter,

	     I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))

		return -EIO;



	core = kzalloc(sizeof(struct mt9v011), GFP_KERNEL);

	if (!core)

		return -ENOMEM;



	core->global_gain = 0x0024;



	sd = &core->sd;

	v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);

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

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



	return 0;

}



static int mt9v011_remove(struct i2c_client *c)

{

	struct v4l2_subdev *sd = i2c_get_clientdata(c);



	v4l2_dbg(1, debug, sd,

		"mt9v011.c: removing mt9v011 adapter on address 0x%x\n",

		c->addr << 1);



	v4l2_device_unregister_subdev(sd);

	kfree(to_mt9v011(sd));

	return 0;

}



/* ----------------------------------------------------------------------- */



static const struct i2c_device_id mt9v011_id[] = {

	{ "mt9v011", 0 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, mt9v011_id);



static struct v4l2_i2c_driver_data v4l2_i2c_data = {

	.name = "mt9v011",

	.probe = mt9v011_probe,

	.remove = mt9v011_remove,

	.id_table = mt9v011_id,

};

drivers/media/video/mt9v011.h

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/*

 * mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor

 *

 * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com)

 * This code is placed under the terms of the GNU General Public License v2

 */



#ifndef MT9V011_H_

#define MT9V011_H_



#define R00_MT9V011_CHIP_VERSION	0x00

#define R01_MT9V011_ROWSTART		0x01

#define R02_MT9V011_COLSTART		0x02

#define R03_MT9V011_HEIGHT		0x03

#define R04_MT9V011_WIDTH		0x04

#define R05_MT9V011_HBLANK		0x05

#define R06_MT9V011_VBLANK		0x06

#define R07_MT9V011_OUT_CTRL		0x07

#define R09_MT9V011_SHUTTER_WIDTH	0x09

#define R0A_MT9V011_CLK_SPEED		0x0a

#define R0B_MT9V011_RESTART		0x0b

#define R0C_MT9V011_SHUTTER_DELAY	0x0c

#define R0D_MT9V011_RESET		0x0d

#define R1E_MT9V011_DIGITAL_ZOOM	0x1e

#define R20_MT9V011_READ_MODE		0x20

#define R2B_MT9V011_GREEN_1_GAIN	0x2b

#define R2C_MT9V011_BLUE_GAIN		0x2c

#define R2D_MT9V011_RED_GAIN		0x2d

#define R2E_MT9V011_GREEN_2_GAIN	0x2e

#define R35_MT9V011_GLOBAL_GAIN		0x35

#define RF1_MT9V011_CHIP_ENABLE		0xf1



#define MT9V011_VERSION			0x8243



#endif

include/media/v4l2-chip-ident.h

+3 −0
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@@ -155,6 +155,9 @@ enum { 
	/* module cafe_ccic, just ident 8801 */

	V4L2_IDENT_CAFE = 8801,



	/* module mt9v011, just ident 8243 */

	V4L2_IDENT_MT9V011 = 8243,



	/* module tw9910: just ident 9910 */

	V4L2_IDENT_TW9910 = 9910,