drivers/staging/go7007/wis-tw9903.c - linux - Git at Google

 /*
  * 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 <linux/ioctl.h>
 #include <linux/slab.h>

 #include "wis-i2c.h"

 struct wis_tw9903 {
 	int norm;
 	int brightness;
 	int contrast;
 	int hue;
 };

 static u8 initial_registers[] =
 {
 	0x02, 0x44, /* input 1, composite */
 	0x03, 0x92, /* correct digital format */
 	0x04, 0x00,
 	0x05, 0x80, /* or 0x00 for PAL */
 	0x06, 0x40, /* second internal current reference */
 	0x07, 0x02, /* window */
 	0x08, 0x14, /* window */
 	0x09, 0xf0, /* window */
 	0x0a, 0x81, /* window */
 	0x0b, 0xd0, /* window */
 	0x0c, 0x8c,
 	0x0d, 0x00, /* scaling */
 	0x0e, 0x11, /* scaling */
 	0x0f, 0x00, /* scaling */
 	0x10, 0x00, /* brightness */
 	0x11, 0x60, /* contrast */
 	0x12, 0x01, /* sharpness */
 	0x13, 0x7f, /* U gain */
 	0x14, 0x5a, /* V gain */
 	0x15, 0x00, /* hue */
 	0x16, 0xc3, /* sharpness */
 	0x18, 0x00,
 	0x19, 0x58, /* vbi */
 	0x1a, 0x80,
 	0x1c, 0x0f, /* video norm */
 	0x1d, 0x7f, /* video norm */
 	0x20, 0xa0, /* clamping gain (working 0x50) */
 	0x21, 0x22,
 	0x22, 0xf0,
 	0x23, 0xfe,
 	0x24, 0x3c,
 	0x25, 0x38,
 	0x26, 0x44,
 	0x27, 0x20,
 	0x28, 0x00,
 	0x29, 0x15,
 	0x2a, 0xa0,
 	0x2b, 0x44,
 	0x2c, 0x37,
 	0x2d, 0x00,
 	0x2e, 0xa5, /* burst PLL control (working: a9) */
 	0x2f, 0xe0, /* 0xea is blue test frame -- 0xe0 for normal */
 	0x31, 0x00,
 	0x33, 0x22,
 	0x34, 0x11,
 	0x35, 0x35,
 	0x3b, 0x05,
 	0x06, 0xc0, /* reset device */
 	0x00, 0x00, /* Terminator (reg 0x00 is read-only) */
 };

 static int write_reg(struct i2c_client *client, u8 reg, u8 value)
 {
 	return i2c_smbus_write_byte_data(client, reg, value);
 }

 static int write_regs(struct i2c_client *client, u8 *regs)
 {
 	int i;

 	for (i = 0; regs[i] != 0x00; i += 2)
 		if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0)
 			return -1;
 	return 0;
 }

 static int wis_tw9903_command(struct i2c_client *client,
 				unsigned int cmd, void *arg)
 {
 	struct wis_tw9903 *dec = i2c_get_clientdata(client);

 	switch (cmd) {
 	case VIDIOC_S_INPUT:
 	{
 		int *input = arg;

 		i2c_smbus_write_byte_data(client, 0x02, 0x40 | (*input << 1));
 		break;
 	}
 #if 0
 	/* The scaler on this thing seems to be horribly broken */
 	case DECODER_SET_RESOLUTION:
 	{
 		struct video_decoder_resolution *res = arg;
 		/*int hscale = 256 * 720 / res->width;*/
 		int hscale = 256 * 720 / (res->width - (res->width > 704 ? 0 : 8));
 		int vscale = 256 * (dec->norm & V4L2_STD_NTSC ?  240 : 288)
 				/ res->height;
 		u8 regs[] = {
 			0x0d, vscale & 0xff,
 			0x0f, hscale & 0xff,
 			0x0e, ((vscale & 0xf00) >> 4) | ((hscale & 0xf00) >> 8),
 			0x06, 0xc0, /* reset device */
 			0,	0,
 		};
 		printk(KERN_DEBUG "vscale is %04x, hscale is %04x\n",
 				vscale, hscale);
 		/*write_regs(client, regs);*/
 		break;
 	}
 #endif
 	case VIDIOC_S_STD:
 	{
 		v4l2_std_id *input = arg;
 		u8 regs[] = {
 			0x05, *input & V4L2_STD_NTSC ? 0x80 : 0x00,
 			0x07, *input & V4L2_STD_NTSC ? 0x02 : 0x12,
 			0x08, *input & V4L2_STD_NTSC ? 0x14 : 0x18,
 			0x09, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
 			0,	0,
 		};
 		write_regs(client, regs);
 		dec->norm = *input;
 		break;
 	}
 	case VIDIOC_QUERYCTRL:
 	{
 		struct v4l2_queryctrl *ctrl = arg;

 		switch (ctrl->id) {
 		case V4L2_CID_BRIGHTNESS:
 			ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 			strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
 			ctrl->minimum = -128;
 			ctrl->maximum = 127;
 			ctrl->step = 1;
 			ctrl->default_value = 0x00;
 			ctrl->flags = 0;
 			break;
 		case V4L2_CID_CONTRAST:
 			ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 			strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
 			ctrl->minimum = 0;
 			ctrl->maximum = 255;
 			ctrl->step = 1;
 			ctrl->default_value = 0x60;
 			ctrl->flags = 0;
 			break;
 #if 0
 		/* I don't understand how the Chroma Gain registers work... */
 		case V4L2_CID_SATURATION:
 			ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 			strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
 			ctrl->minimum = 0;
 			ctrl->maximum = 127;
 			ctrl->step = 1;
 			ctrl->default_value = 64;
 			ctrl->flags = 0;
 			break;
 #endif
 		case V4L2_CID_HUE:
 			ctrl->type = V4L2_CTRL_TYPE_INTEGER;
 			strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
 			ctrl->minimum = -128;
 			ctrl->maximum = 127;
 			ctrl->step = 1;
 			ctrl->default_value = 0;
 			ctrl->flags = 0;
 			break;
 		}
 		break;
 	}
 	case VIDIOC_S_CTRL:
 	{
 		struct v4l2_control *ctrl = arg;

 		switch (ctrl->id) {
 		case V4L2_CID_BRIGHTNESS:
 			if (ctrl->value > 127)
 				dec->brightness = 127;
 			else if (ctrl->value < -128)
 				dec->brightness = -128;
 			else
 				dec->brightness = ctrl->value;
 			write_reg(client, 0x10, dec->brightness);
 			break;
 		case V4L2_CID_CONTRAST:
 			if (ctrl->value > 255)
 				dec->contrast = 255;
 			else if (ctrl->value < 0)
 				dec->contrast = 0;
 			else
 				dec->contrast = ctrl->value;
 			write_reg(client, 0x11, dec->contrast);
 			break;
 #if 0
 		case V4L2_CID_SATURATION:
 			if (ctrl->value > 127)
 				dec->saturation = 127;
 			else if (ctrl->value < 0)
 				dec->saturation = 0;
 			else
 				dec->saturation = ctrl->value;
 			/*write_reg(client, 0x0c, dec->saturation);*/
 			break;
 #endif
 		case V4L2_CID_HUE:
 			if (ctrl->value > 127)
 				dec->hue = 127;
 			else if (ctrl->value < -128)
 				dec->hue = -128;
 			else
 				dec->hue = ctrl->value;
 			write_reg(client, 0x15, dec->hue);
 			break;
 		}
 		break;
 	}
 	case VIDIOC_G_CTRL:
 	{
 		struct v4l2_control *ctrl = arg;

 		switch (ctrl->id) {
 		case V4L2_CID_BRIGHTNESS:
 			ctrl->value = dec->brightness;
 			break;
 		case V4L2_CID_CONTRAST:
 			ctrl->value = dec->contrast;
 			break;
 #if 0
 		case V4L2_CID_SATURATION:
 			ctrl->value = dec->saturation;
 			break;
 #endif
 		case V4L2_CID_HUE:
 			ctrl->value = dec->hue;
 			break;
 		}
 		break;
 	}
 	default:
 		break;
 	}
 	return 0;
 }

 static int wis_tw9903_probe(struct i2c_client *client,
 			    const struct i2c_device_id *id)
 {
 	struct i2c_adapter *adapter = client->adapter;
 	struct wis_tw9903 *dec;

 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 		return -ENODEV;

 	dec = kmalloc(sizeof(struct wis_tw9903), GFP_KERNEL);
 	if (dec == NULL)
 		return -ENOMEM;

 	dec->norm = V4L2_STD_NTSC;
 	dec->brightness = 0;
 	dec->contrast = 0x60;
 	dec->hue = 0;
 	i2c_set_clientdata(client, dec);

 	printk(KERN_DEBUG
 		"wis-tw9903: initializing TW9903 at address %d on %s\n",
 		client->addr, adapter->name);

 	if (write_regs(client, initial_registers) < 0) {
 		printk(KERN_ERR "wis-tw9903: error initializing TW9903\n");
 		kfree(dec);
 		return -ENODEV;
 	}

 	return 0;
 }

 static int wis_tw9903_remove(struct i2c_client *client)
 {
 	struct wis_tw9903 *dec = i2c_get_clientdata(client);

 	i2c_set_clientdata(client, NULL);
 	kfree(dec);
 	return 0;
 }

 static const struct i2c_device_id wis_tw9903_id[] = {
 	{ "wis_tw9903", 0 },
 	{ }
 };

 static struct i2c_driver wis_tw9903_driver = {
 	.driver = {
 		.name	= "WIS TW9903 I2C driver",
 	},
 	.probe		= wis_tw9903_probe,
 	.remove		= wis_tw9903_remove,
 	.command	= wis_tw9903_command,
 	.id_table	= wis_tw9903_id,
 };

 static int __init wis_tw9903_init(void)
 {
 	return i2c_add_driver(&wis_tw9903_driver);
 }

 static void __exit wis_tw9903_cleanup(void)
 {
 	i2c_del_driver(&wis_tw9903_driver);
 }

 module_init(wis_tw9903_init);
 module_exit(wis_tw9903_cleanup);

 MODULE_LICENSE("GPL v2");
	/*
	* 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 <linux/ioctl.h>
	#include <linux/slab.h>

	#include "wis-i2c.h"

	struct wis_tw9903 {
	int norm;
	int brightness;
	int contrast;
	int hue;
	};

	static u8 initial_registers[] =
	{
	0x02, 0x44, /* input 1, composite */
	0x03, 0x92, /* correct digital format */
	0x04, 0x00,
	0x05, 0x80, /* or 0x00 for PAL */
	0x06, 0x40, /* second internal current reference */
	0x07, 0x02, /* window */
	0x08, 0x14, /* window */
	0x09, 0xf0, /* window */
	0x0a, 0x81, /* window */
	0x0b, 0xd0, /* window */
	0x0c, 0x8c,
	0x0d, 0x00, /* scaling */
	0x0e, 0x11, /* scaling */
	0x0f, 0x00, /* scaling */
	0x10, 0x00, /* brightness */
	0x11, 0x60, /* contrast */
	0x12, 0x01, /* sharpness */
	0x13, 0x7f, /* U gain */
	0x14, 0x5a, /* V gain */
	0x15, 0x00, /* hue */
	0x16, 0xc3, /* sharpness */
	0x18, 0x00,
	0x19, 0x58, /* vbi */
	0x1a, 0x80,
	0x1c, 0x0f, /* video norm */
	0x1d, 0x7f, /* video norm */
	0x20, 0xa0, /* clamping gain (working 0x50) */
	0x21, 0x22,
	0x22, 0xf0,
	0x23, 0xfe,
	0x24, 0x3c,
	0x25, 0x38,
	0x26, 0x44,
	0x27, 0x20,
	0x28, 0x00,
	0x29, 0x15,
	0x2a, 0xa0,
	0x2b, 0x44,
	0x2c, 0x37,
	0x2d, 0x00,
	0x2e, 0xa5, /* burst PLL control (working: a9) */
	0x2f, 0xe0, /* 0xea is blue test frame -- 0xe0 for normal */
	0x31, 0x00,
	0x33, 0x22,
	0x34, 0x11,
	0x35, 0x35,
	0x3b, 0x05,
	0x06, 0xc0, /* reset device */
	0x00, 0x00, /* Terminator (reg 0x00 is read-only) */
	};

	static int write_reg(struct i2c_client *client, u8 reg, u8 value)
	{
	return i2c_smbus_write_byte_data(client, reg, value);
	}

	static int write_regs(struct i2c_client client, u8 regs)
	{
	int i;

	for (i = 0; regs[i] != 0x00; i += 2)
	if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0)
	return -1;
	return 0;
	}

	static int wis_tw9903_command(struct i2c_client *client,
	unsigned int cmd, void *arg)
	{
	struct wis_tw9903 *dec = i2c_get_clientdata(client);

	switch (cmd) {
	case VIDIOC_S_INPUT:
	{
	int *input = arg;

	i2c_smbus_write_byte_data(client, 0x02, 0x40 \| (*input << 1));
	break;
	}
	#if 0
	/* The scaler on this thing seems to be horribly broken */
	case DECODER_SET_RESOLUTION:
	{
	struct video_decoder_resolution *res = arg;
	/int hscale = 256 720 / res->width;*/
	int hscale = 256 * 720 / (res->width - (res->width > 704 ? 0 : 8));
	int vscale = 256 * (dec->norm & V4L2_STD_NTSC ? 240 : 288)
	/ res->height;
	u8 regs[] = {
	0x0d, vscale & 0xff,
	0x0f, hscale & 0xff,
	0x0e, ((vscale & 0xf00) >> 4) \| ((hscale & 0xf00) >> 8),
	0x06, 0xc0, /* reset device */
	0, 0,
	};
	printk(KERN_DEBUG "vscale is %04x, hscale is %04x\n",
	vscale, hscale);
	/write_regs(client, regs);/
	break;
	}
	#endif
	case VIDIOC_S_STD:
	{
	v4l2_std_id *input = arg;
	u8 regs[] = {
	0x05, *input & V4L2_STD_NTSC ? 0x80 : 0x00,
	0x07, *input & V4L2_STD_NTSC ? 0x02 : 0x12,
	0x08, *input & V4L2_STD_NTSC ? 0x14 : 0x18,
	0x09, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
	0, 0,
	};
	write_regs(client, regs);
	dec->norm = *input;
	break;
	}
	case VIDIOC_QUERYCTRL:
	{
	struct v4l2_queryctrl *ctrl = arg;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
	ctrl->type = V4L2_CTRL_TYPE_INTEGER;
	strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
	ctrl->minimum = -128;
	ctrl->maximum = 127;
	ctrl->step = 1;
	ctrl->default_value = 0x00;
	ctrl->flags = 0;
	break;
	case V4L2_CID_CONTRAST:
	ctrl->type = V4L2_CTRL_TYPE_INTEGER;
	strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
	ctrl->minimum = 0;
	ctrl->maximum = 255;
	ctrl->step = 1;
	ctrl->default_value = 0x60;
	ctrl->flags = 0;
	break;
	#if 0
	/* I don't understand how the Chroma Gain registers work... */
	case V4L2_CID_SATURATION:
	ctrl->type = V4L2_CTRL_TYPE_INTEGER;
	strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
	ctrl->minimum = 0;
	ctrl->maximum = 127;
	ctrl->step = 1;
	ctrl->default_value = 64;
	ctrl->flags = 0;
	break;
	#endif
	case V4L2_CID_HUE:
	ctrl->type = V4L2_CTRL_TYPE_INTEGER;
	strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
	ctrl->minimum = -128;
	ctrl->maximum = 127;
	ctrl->step = 1;
	ctrl->default_value = 0;
	ctrl->flags = 0;
	break;
	}
	break;
	}
	case VIDIOC_S_CTRL:
	{
	struct v4l2_control *ctrl = arg;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
	if (ctrl->value > 127)
	dec->brightness = 127;
	else if (ctrl->value < -128)
	dec->brightness = -128;
	else
	dec->brightness = ctrl->value;
	write_reg(client, 0x10, dec->brightness);
	break;
	case V4L2_CID_CONTRAST:
	if (ctrl->value > 255)
	dec->contrast = 255;
	else if (ctrl->value < 0)
	dec->contrast = 0;
	else
	dec->contrast = ctrl->value;
	write_reg(client, 0x11, dec->contrast);
	break;
	#if 0
	case V4L2_CID_SATURATION:
	if (ctrl->value > 127)
	dec->saturation = 127;
	else if (ctrl->value < 0)
	dec->saturation = 0;
	else
	dec->saturation = ctrl->value;
	/write_reg(client, 0x0c, dec->saturation);/
	break;
	#endif
	case V4L2_CID_HUE:
	if (ctrl->value > 127)
	dec->hue = 127;
	else if (ctrl->value < -128)
	dec->hue = -128;
	else
	dec->hue = ctrl->value;
	write_reg(client, 0x15, dec->hue);
	break;
	}
	break;
	}
	case VIDIOC_G_CTRL:
	{
	struct v4l2_control *ctrl = arg;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
	ctrl->value = dec->brightness;
	break;
	case V4L2_CID_CONTRAST:
	ctrl->value = dec->contrast;
	break;
	#if 0
	case V4L2_CID_SATURATION:
	ctrl->value = dec->saturation;
	break;
	#endif
	case V4L2_CID_HUE:
	ctrl->value = dec->hue;
	break;
	}
	break;
	}
	default:
	break;
	}
	return 0;
	}

	static int wis_tw9903_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	struct i2c_adapter *adapter = client->adapter;
	struct wis_tw9903 *dec;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	return -ENODEV;

	dec = kmalloc(sizeof(struct wis_tw9903), GFP_KERNEL);
	if (dec == NULL)
	return -ENOMEM;

	dec->norm = V4L2_STD_NTSC;
	dec->brightness = 0;
	dec->contrast = 0x60;
	dec->hue = 0;
	i2c_set_clientdata(client, dec);

	printk(KERN_DEBUG
	"wis-tw9903: initializing TW9903 at address %d on %s\n",
	client->addr, adapter->name);

	if (write_regs(client, initial_registers) < 0) {
	printk(KERN_ERR "wis-tw9903: error initializing TW9903\n");
	kfree(dec);
	return -ENODEV;
	}

	return 0;
	}

	static int wis_tw9903_remove(struct i2c_client *client)
	{
	struct wis_tw9903 *dec = i2c_get_clientdata(client);

	i2c_set_clientdata(client, NULL);
	kfree(dec);
	return 0;
	}

	static const struct i2c_device_id wis_tw9903_id[] = {
	{ "wis_tw9903", 0 },
	{ }
	};

	static struct i2c_driver wis_tw9903_driver = {
	.driver = {
	.name = "WIS TW9903 I2C driver",
	},
	.probe = wis_tw9903_probe,
	.remove = wis_tw9903_remove,
	.command = wis_tw9903_command,
	.id_table = wis_tw9903_id,
	};

	static int __init wis_tw9903_init(void)
	{
	return i2c_add_driver(&wis_tw9903_driver);
	}

	static void __exit wis_tw9903_cleanup(void)
	{
	i2c_del_driver(&wis_tw9903_driver);
	}

	module_init(wis_tw9903_init);
	module_exit(wis_tw9903_cleanup);

	MODULE_LICENSE("GPL v2");