drivers/media/video/adv7170.c - kernel/msm - Gitiles

 /*
  * adv7170 - adv7170, adv7171 video encoder driver version 0.0.1
  *
  * Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com>
  *
  * Based on adv7176 driver by:
  *
  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
  * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
  *    - some corrections for Pinnacle Systems Inc. DC10plus card.
  *
  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
 #include <linux/fs.h>
 #include <linux/kernel.h>
 #include <linux/major.h>
 #include <linux/slab.h>
 #include <linux/mm.h>
 #include <linux/pci.h>
 #include <linux/signal.h>
 #include <asm/io.h>
 #include <asm/pgtable.h>
 #include <asm/page.h>
 #include <linux/sched.h>
 #include <linux/types.h>

 #include <linux/videodev.h>
 #include <asm/uaccess.h>

 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
 MODULE_AUTHOR("Maxim Yevtyushkin");
 MODULE_LICENSE("GPL");

 #include <linux/i2c.h>
 #include <linux/i2c-dev.h>

 #define I2C_NAME(x) (x)->name

 #include <linux/video_encoder.h>

 static int debug = 0;
 module_param(debug, int, 0);
 MODULE_PARM_DESC(debug, "Debug level (0-1)");

 #define dprintk(num, format, args...) \
 	do { \
 		if (debug >= num) \
 			printk(format, ##args); \
 	} while (0)

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

 struct adv7170 {
 	unsigned char reg[128];

 	int norm;
 	int input;
 	int enable;
 	int bright;
 	int contrast;
 	int hue;
 	int sat;
 };

 #define   I2C_ADV7170        0xd4
 #define   I2C_ADV7171        0x54

 static char adv7170_name[] = "adv7170";
 static char adv7171_name[] = "adv7171";

 static char *inputs[] = { "pass_through", "play_back" };
 static char *norms[] = { "PAL", "NTSC" };

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

 static inline int
 adv7170_write (struct i2c_client *client,
 	       u8                 reg,
 	       u8                 value)
 {
 	struct adv7170 *encoder = i2c_get_clientdata(client);

 	encoder->reg[reg] = value;
 	return i2c_smbus_write_byte_data(client, reg, value);
 }

 static inline int
 adv7170_read (struct i2c_client *client,
 	      u8                 reg)
 {
 	return i2c_smbus_read_byte_data(client, reg);
 }

 static int
 adv7170_write_block (struct i2c_client *client,
 		     const u8          *data,
 		     unsigned int       len)
 {
 	int ret = -1;
 	u8 reg;

 	/* the adv7170 has an autoincrement function, use it if
 	 * the adapter understands raw I2C */
 	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 		/* do raw I2C, not smbus compatible */
 		struct adv7170 *encoder = i2c_get_clientdata(client);
 		struct i2c_msg msg;
 		u8 block_data[32];

 		msg.addr = client->addr;
 		msg.flags = 0;
 		while (len >= 2) {
 			msg.buf = (char *) block_data;
 			msg.len = 0;
 			block_data[msg.len++] = reg = data[0];
 			do {
 				block_data[msg.len++] =
 				    encoder->reg[reg++] = data[1];
 				len -= 2;
 				data += 2;
 			} while (len >= 2 && data[0] == reg &&
 				 msg.len < 32);
 			if ((ret = i2c_transfer(client->adapter,
 						&msg, 1)) < 0)
 				break;
 		}
 	} else {
 		/* do some slow I2C emulation kind of thing */
 		while (len >= 2) {
 			reg = *data++;
 			if ((ret = adv7170_write(client, reg,
 						 *data++)) < 0)
 				break;
 			len -= 2;
 		}
 	}

 	return ret;
 }

 /* ----------------------------------------------------------------------- */
 // Output filter:  S-Video  Composite

 #define MR050       0x11	//0x09
 #define MR060       0x14	//0x0c

 //---------------------------------------------------------------------------

 #define TR0MODE     0x4c
 #define TR0RST	    0x80

 #define TR1CAPT	    0x00
 #define TR1PLAY	    0x00


 static const unsigned char init_NTSC[] = {
 	0x00, 0x10,		// MR0
 	0x01, 0x20,		// MR1
 	0x02, 0x0e,		// MR2 RTC control: bits 2 and 1
 	0x03, 0x80,		// MR3
 	0x04, 0x30,		// MR4
 	0x05, 0x00,		// Reserved
 	0x06, 0x00,		// Reserved
 	0x07, TR0MODE,		// TM0
 	0x08, TR1CAPT,		// TM1
 	0x09, 0x16,		// Fsc0
 	0x0a, 0x7c,		// Fsc1
 	0x0b, 0xf0,		// Fsc2
 	0x0c, 0x21,		// Fsc3
 	0x0d, 0x00,		// Subcarrier Phase
 	0x0e, 0x00,		// Closed Capt. Ext 0
 	0x0f, 0x00,		// Closed Capt. Ext 1
 	0x10, 0x00,		// Closed Capt. 0
 	0x11, 0x00,		// Closed Capt. 1
 	0x12, 0x00,		// Pedestal Ctl 0
 	0x13, 0x00,		// Pedestal Ctl 1
 	0x14, 0x00,		// Pedestal Ctl 2
 	0x15, 0x00,		// Pedestal Ctl 3
 	0x16, 0x00,		// CGMS_WSS_0
 	0x17, 0x00,		// CGMS_WSS_1
 	0x18, 0x00,		// CGMS_WSS_2
 	0x19, 0x00,		// Teletext Ctl
 };

 static const unsigned char init_PAL[] = {
 	0x00, 0x71,		// MR0
 	0x01, 0x20,		// MR1
 	0x02, 0x0e,		// MR2 RTC control: bits 2 and 1
 	0x03, 0x80,		// MR3
 	0x04, 0x30,		// MR4
 	0x05, 0x00,		// Reserved
 	0x06, 0x00,		// Reserved
 	0x07, TR0MODE,		// TM0
 	0x08, TR1CAPT,		// TM1
 	0x09, 0xcb,		// Fsc0
 	0x0a, 0x8a,		// Fsc1
 	0x0b, 0x09,		// Fsc2
 	0x0c, 0x2a,		// Fsc3
 	0x0d, 0x00,		// Subcarrier Phase
 	0x0e, 0x00,		// Closed Capt. Ext 0
 	0x0f, 0x00,		// Closed Capt. Ext 1
 	0x10, 0x00,		// Closed Capt. 0
 	0x11, 0x00,		// Closed Capt. 1
 	0x12, 0x00,		// Pedestal Ctl 0
 	0x13, 0x00,		// Pedestal Ctl 1
 	0x14, 0x00,		// Pedestal Ctl 2
 	0x15, 0x00,		// Pedestal Ctl 3
 	0x16, 0x00,		// CGMS_WSS_0
 	0x17, 0x00,		// CGMS_WSS_1
 	0x18, 0x00,		// CGMS_WSS_2
 	0x19, 0x00,		// Teletext Ctl
 };


 static int
 adv7170_command (struct i2c_client *client,
 		 unsigned int       cmd,
 		 void *             arg)
 {
 	struct adv7170 *encoder = i2c_get_clientdata(client);

 	switch (cmd) {

 	case 0:
 #if 0
 		/* This is just for testing!!! */
 		adv7170_write_block(client, init_common,
 				    sizeof(init_common));
 		adv7170_write(client, 0x07, TR0MODE | TR0RST);
 		adv7170_write(client, 0x07, TR0MODE);
 #endif
 		break;

 	case ENCODER_GET_CAPABILITIES:
 	{
 		struct video_encoder_capability *cap = arg;

 		cap->flags = VIDEO_ENCODER_PAL |
 			     VIDEO_ENCODER_NTSC;
 		cap->inputs = 2;
 		cap->outputs = 1;
 	}
 		break;

 	case ENCODER_SET_NORM:
 	{
 		int iarg = *(int *) arg;

 		dprintk(1, KERN_DEBUG "%s_command: set norm %d",
 			I2C_NAME(client), iarg);

 		switch (iarg) {

 		case VIDEO_MODE_NTSC:
 			adv7170_write_block(client, init_NTSC,
 					    sizeof(init_NTSC));
 			if (encoder->input == 0)
 				adv7170_write(client, 0x02, 0x0e);	// Enable genlock
 			adv7170_write(client, 0x07, TR0MODE | TR0RST);
 			adv7170_write(client, 0x07, TR0MODE);
 			break;

 		case VIDEO_MODE_PAL:
 			adv7170_write_block(client, init_PAL,
 					    sizeof(init_PAL));
 			if (encoder->input == 0)
 				adv7170_write(client, 0x02, 0x0e);	// Enable genlock
 			adv7170_write(client, 0x07, TR0MODE | TR0RST);
 			adv7170_write(client, 0x07, TR0MODE);
 			break;

 		default:
 			dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
 			       I2C_NAME(client), iarg);
 			return -EINVAL;

 		}
 		dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
 			norms[iarg]);
 		encoder->norm = iarg;
 	}
 		break;

 	case ENCODER_SET_INPUT:
 	{
 		int iarg = *(int *) arg;

 		/* RJ: *iarg = 0: input is from decoder
 		 *iarg = 1: input is from ZR36060
 		 *iarg = 2: color bar */

 		dprintk(1, KERN_DEBUG "%s_command: set input from %s\n",
 			I2C_NAME(client),
 			iarg == 0 ? "decoder" : "ZR36060");

 		switch (iarg) {

 		case 0:
 			adv7170_write(client, 0x01, 0x20);
 			adv7170_write(client, 0x08, TR1CAPT);	/* TR1 */
 			adv7170_write(client, 0x02, 0x0e);	// Enable genlock
 			adv7170_write(client, 0x07, TR0MODE | TR0RST);
 			adv7170_write(client, 0x07, TR0MODE);
 			//udelay(10);
 			break;

 		case 1:
 			adv7170_write(client, 0x01, 0x00);
 			adv7170_write(client, 0x08, TR1PLAY);	/* TR1 */
 			adv7170_write(client, 0x02, 0x08);
 			adv7170_write(client, 0x07, TR0MODE | TR0RST);
 			adv7170_write(client, 0x07, TR0MODE);
 			//udelay(10);
 			break;

 		default:
 			dprintk(1, KERN_ERR "%s: illegal input: %d\n",
 				I2C_NAME(client), iarg);
 			return -EINVAL;

 		}
 		dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
 			inputs[iarg]);
 		encoder->input = iarg;
 	}
 		break;

 	case ENCODER_SET_OUTPUT:
 	{
 		int *iarg = arg;

 		/* not much choice of outputs */
 		if (*iarg != 0) {
 			return -EINVAL;
 		}
 	}
 		break;

 	case ENCODER_ENABLE_OUTPUT:
 	{
 		int *iarg = arg;

 		encoder->enable = !!*iarg;
 	}
 		break;

 	default:
 		return -EINVAL;
 	}

 	return 0;
 }

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

 /*
  * Generic i2c probe
  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
  */
 static unsigned short normal_i2c[] =
     { I2C_ADV7170 >> 1, (I2C_ADV7170 >> 1) + 1,
 	I2C_ADV7171 >> 1, (I2C_ADV7171 >> 1) + 1,
 	I2C_CLIENT_END
 };

 static unsigned short ignore = I2C_CLIENT_END;

 static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_i2c,
 	.probe			= &ignore,
 	.ignore			= &ignore,
 };

 static struct i2c_driver i2c_driver_adv7170;

 static int
 adv7170_detect_client (struct i2c_adapter *adapter,
 		       int                 address,
 		       int                 kind)
 {
 	int i;
 	struct i2c_client *client;
 	struct adv7170 *encoder;
 	char *dname;

 	dprintk(1,
 		KERN_INFO
 		"adv7170.c: detecting adv7170 client on address 0x%x\n",
 		address << 1);

 	/* Check if the adapter supports the needed features */
 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 		return 0;

 	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 	if (client == 0)
 		return -ENOMEM;
 	client->addr = address;
 	client->adapter = adapter;
 	client->driver = &i2c_driver_adv7170;
 	if ((client->addr == I2C_ADV7170 >> 1) ||
 	    (client->addr == (I2C_ADV7170 >> 1) + 1)) {
 		dname = adv7170_name;
 	} else if ((client->addr == I2C_ADV7171 >> 1) ||
 		   (client->addr == (I2C_ADV7171 >> 1) + 1)) {
 		dname = adv7171_name;
 	} else {
 		/* We should never get here!!! */
 		kfree(client);
 		return 0;
 	}
 	strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));

 	encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);
 	if (encoder == NULL) {
 		kfree(client);
 		return -ENOMEM;
 	}
 	encoder->norm = VIDEO_MODE_NTSC;
 	encoder->input = 0;
 	encoder->enable = 1;
 	i2c_set_clientdata(client, encoder);

 	i = i2c_attach_client(client);
 	if (i) {
 		kfree(client);
 		kfree(encoder);
 		return i;
 	}

 	i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));
 	if (i >= 0) {
 		i = adv7170_write(client, 0x07, TR0MODE | TR0RST);
 		i = adv7170_write(client, 0x07, TR0MODE);
 		i = adv7170_read(client, 0x12);
 		dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%02x\n",
 			I2C_NAME(client), i & 1, client->addr << 1);
 	}
 	if (i < 0) {
 		dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
 		       I2C_NAME(client), i);
 	}

 	return 0;
 }

 static int
 adv7170_attach_adapter (struct i2c_adapter *adapter)
 {
 	dprintk(1,
 		KERN_INFO
 		"adv7170.c: starting probe for adapter %s (0x%x)\n",
 		I2C_NAME(adapter), adapter->id);
 	return i2c_probe(adapter, &addr_data, &adv7170_detect_client);
 }

 static int
 adv7170_detach_client (struct i2c_client *client)
 {
 	struct adv7170 *encoder = i2c_get_clientdata(client);
 	int err;

 	err = i2c_detach_client(client);
 	if (err) {
 		return err;
 	}

 	kfree(encoder);
 	kfree(client);

 	return 0;
 }

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

 static struct i2c_driver i2c_driver_adv7170 = {
 	.driver = {
 		.name = "adv7170",	/* name */
 	},

 	.id = I2C_DRIVERID_ADV7170,

 	.attach_adapter = adv7170_attach_adapter,
 	.detach_client = adv7170_detach_client,
 	.command = adv7170_command,
 };

 static int __init
 adv7170_init (void)
 {
 	return i2c_add_driver(&i2c_driver_adv7170);
 }

 static void __exit
 adv7170_exit (void)
 {
 	i2c_del_driver(&i2c_driver_adv7170);
 }

 module_init(adv7170_init);
 module_exit(adv7170_exit);
	/*
	* adv7170 - adv7170, adv7171 video encoder driver version 0.0.1
	*
	* Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com>
	*
	* Based on adv7176 driver by:
	*
	* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
	* Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
	* Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
	* - some corrections for Pinnacle Systems Inc. DC10plus card.
	*
	* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
	* - moved over to linux>=2.4.x i2c protocol (1/1/2003)
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/delay.h>
	#include <linux/errno.h>
	#include <linux/fs.h>
	#include <linux/kernel.h>
	#include <linux/major.h>
	#include <linux/slab.h>
	#include <linux/mm.h>
	#include <linux/pci.h>
	#include <linux/signal.h>
	#include <asm/io.h>
	#include <asm/pgtable.h>
	#include <asm/page.h>
	#include <linux/sched.h>
	#include <linux/types.h>

	#include <linux/videodev.h>
	#include <asm/uaccess.h>

	MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
	MODULE_AUTHOR("Maxim Yevtyushkin");
	MODULE_LICENSE("GPL");

	#include <linux/i2c.h>
	#include <linux/i2c-dev.h>

	#define I2C_NAME(x) (x)->name

	#include <linux/video_encoder.h>

	static int debug = 0;
	module_param(debug, int, 0);
	MODULE_PARM_DESC(debug, "Debug level (0-1)");

	#define dprintk(num, format, args...) \
	do { \
	if (debug >= num) \
	printk(format, ##args); \
	} while (0)

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

	struct adv7170 {
	unsigned char reg[128];

	int norm;
	int input;
	int enable;
	int bright;
	int contrast;
	int hue;
	int sat;
	};

	#define I2C_ADV7170 0xd4
	#define I2C_ADV7171 0x54

	static char adv7170_name[] = "adv7170";
	static char adv7171_name[] = "adv7171";

	static char *inputs[] = { "pass_through", "play_back" };
	static char *norms[] = { "PAL", "NTSC" };

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

	static inline int
	adv7170_write (struct i2c_client *client,
	u8 reg,
	u8 value)
	{
	struct adv7170 *encoder = i2c_get_clientdata(client);

	encoder->reg[reg] = value;
	return i2c_smbus_write_byte_data(client, reg, value);
	}

	static inline int
	adv7170_read (struct i2c_client *client,
	u8 reg)
	{
	return i2c_smbus_read_byte_data(client, reg);
	}

	static int
	adv7170_write_block (struct i2c_client *client,
	const u8 *data,
	unsigned int len)
	{
	int ret = -1;
	u8 reg;

	/* the adv7170 has an autoincrement function, use it if
	* the adapter understands raw I2C */
	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
	/* do raw I2C, not smbus compatible */
	struct adv7170 *encoder = i2c_get_clientdata(client);
	struct i2c_msg msg;
	u8 block_data[32];

	msg.addr = client->addr;
	msg.flags = 0;
	while (len >= 2) {
	msg.buf = (char *) block_data;
	msg.len = 0;
	block_data[msg.len++] = reg = data[0];
	do {
	block_data[msg.len++] =
	encoder->reg[reg++] = data[1];
	len -= 2;
	data += 2;
	} while (len >= 2 && data[0] == reg &&
	msg.len < 32);
	if ((ret = i2c_transfer(client->adapter,
	&msg, 1)) < 0)
	break;
	}
	} else {
	/* do some slow I2C emulation kind of thing */
	while (len >= 2) {
	reg = *data++;
	if ((ret = adv7170_write(client, reg,
	*data++)) < 0)
	break;
	len -= 2;
	}
	}

	return ret;
	}

	/* ----------------------------------------------------------------------- */
	// Output filter: S-Video Composite

	#define MR050 0x11 //0x09
	#define MR060 0x14 //0x0c

	//---------------------------------------------------------------------------

	#define TR0MODE 0x4c
	#define TR0RST 0x80

	#define TR1CAPT 0x00
	#define TR1PLAY 0x00


	static const unsigned char init_NTSC[] = {
	0x00, 0x10, // MR0
	0x01, 0x20, // MR1
	0x02, 0x0e, // MR2 RTC control: bits 2 and 1
	0x03, 0x80, // MR3
	0x04, 0x30, // MR4
	0x05, 0x00, // Reserved
	0x06, 0x00, // Reserved
	0x07, TR0MODE, // TM0
	0x08, TR1CAPT, // TM1
	0x09, 0x16, // Fsc0
	0x0a, 0x7c, // Fsc1
	0x0b, 0xf0, // Fsc2
	0x0c, 0x21, // Fsc3
	0x0d, 0x00, // Subcarrier Phase
	0x0e, 0x00, // Closed Capt. Ext 0
	0x0f, 0x00, // Closed Capt. Ext 1
	0x10, 0x00, // Closed Capt. 0
	0x11, 0x00, // Closed Capt. 1
	0x12, 0x00, // Pedestal Ctl 0
	0x13, 0x00, // Pedestal Ctl 1
	0x14, 0x00, // Pedestal Ctl 2
	0x15, 0x00, // Pedestal Ctl 3
	0x16, 0x00, // CGMS_WSS_0
	0x17, 0x00, // CGMS_WSS_1
	0x18, 0x00, // CGMS_WSS_2
	0x19, 0x00, // Teletext Ctl
	};

	static const unsigned char init_PAL[] = {
	0x00, 0x71, // MR0
	0x01, 0x20, // MR1
	0x02, 0x0e, // MR2 RTC control: bits 2 and 1
	0x03, 0x80, // MR3
	0x04, 0x30, // MR4
	0x05, 0x00, // Reserved
	0x06, 0x00, // Reserved
	0x07, TR0MODE, // TM0
	0x08, TR1CAPT, // TM1
	0x09, 0xcb, // Fsc0
	0x0a, 0x8a, // Fsc1
	0x0b, 0x09, // Fsc2
	0x0c, 0x2a, // Fsc3
	0x0d, 0x00, // Subcarrier Phase
	0x0e, 0x00, // Closed Capt. Ext 0
	0x0f, 0x00, // Closed Capt. Ext 1
	0x10, 0x00, // Closed Capt. 0
	0x11, 0x00, // Closed Capt. 1
	0x12, 0x00, // Pedestal Ctl 0
	0x13, 0x00, // Pedestal Ctl 1
	0x14, 0x00, // Pedestal Ctl 2
	0x15, 0x00, // Pedestal Ctl 3
	0x16, 0x00, // CGMS_WSS_0
	0x17, 0x00, // CGMS_WSS_1
	0x18, 0x00, // CGMS_WSS_2
	0x19, 0x00, // Teletext Ctl
	};


	static int
	adv7170_command (struct i2c_client *client,
	unsigned int cmd,
	void * arg)
	{
	struct adv7170 *encoder = i2c_get_clientdata(client);

	switch (cmd) {

	case 0:
	#if 0
	/* This is just for testing!!! */
	adv7170_write_block(client, init_common,
	sizeof(init_common));
	adv7170_write(client, 0x07, TR0MODE \| TR0RST);
	adv7170_write(client, 0x07, TR0MODE);
	#endif
	break;

	case ENCODER_GET_CAPABILITIES:
	{
	struct video_encoder_capability *cap = arg;

	cap->flags = VIDEO_ENCODER_PAL \|
	VIDEO_ENCODER_NTSC;
	cap->inputs = 2;
	cap->outputs = 1;
	}
	break;

	case ENCODER_SET_NORM:
	{
	int iarg = (int ) arg;

	dprintk(1, KERN_DEBUG "%s_command: set norm %d",
	I2C_NAME(client), iarg);

	switch (iarg) {

	case VIDEO_MODE_NTSC:
	adv7170_write_block(client, init_NTSC,
	sizeof(init_NTSC));
	if (encoder->input == 0)
	adv7170_write(client, 0x02, 0x0e); // Enable genlock
	adv7170_write(client, 0x07, TR0MODE \| TR0RST);
	adv7170_write(client, 0x07, TR0MODE);
	break;

	case VIDEO_MODE_PAL:
	adv7170_write_block(client, init_PAL,
	sizeof(init_PAL));
	if (encoder->input == 0)
	adv7170_write(client, 0x02, 0x0e); // Enable genlock
	adv7170_write(client, 0x07, TR0MODE \| TR0RST);
	adv7170_write(client, 0x07, TR0MODE);
	break;

	default:
	dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
	I2C_NAME(client), iarg);
	return -EINVAL;

	}
	dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
	norms[iarg]);
	encoder->norm = iarg;
	}
	break;

	case ENCODER_SET_INPUT:
	{
	int iarg = (int ) arg;

	/* RJ: *iarg = 0: input is from decoder
	*iarg = 1: input is from ZR36060
	iarg = 2: color bar /

	dprintk(1, KERN_DEBUG "%s_command: set input from %s\n",
	I2C_NAME(client),
	iarg == 0 ? "decoder" : "ZR36060");

	switch (iarg) {

	case 0:
	adv7170_write(client, 0x01, 0x20);
	adv7170_write(client, 0x08, TR1CAPT); /* TR1 */
	adv7170_write(client, 0x02, 0x0e); // Enable genlock
	adv7170_write(client, 0x07, TR0MODE \| TR0RST);
	adv7170_write(client, 0x07, TR0MODE);
	//udelay(10);
	break;

	case 1:
	adv7170_write(client, 0x01, 0x00);
	adv7170_write(client, 0x08, TR1PLAY); /* TR1 */
	adv7170_write(client, 0x02, 0x08);
	adv7170_write(client, 0x07, TR0MODE \| TR0RST);
	adv7170_write(client, 0x07, TR0MODE);
	//udelay(10);
	break;

	default:
	dprintk(1, KERN_ERR "%s: illegal input: %d\n",
	I2C_NAME(client), iarg);
	return -EINVAL;

	}
	dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
	inputs[iarg]);
	encoder->input = iarg;
	}
	break;

	case ENCODER_SET_OUTPUT:
	{
	int *iarg = arg;

	/* not much choice of outputs */
	if (*iarg != 0) {
	return -EINVAL;
	}
	}
	break;

	case ENCODER_ENABLE_OUTPUT:
	{
	int *iarg = arg;

	encoder->enable = !!*iarg;
	}
	break;

	default:
	return -EINVAL;
	}

	return 0;
	}

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

	/*
	* Generic i2c probe
	* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
	*/
	static unsigned short normal_i2c[] =
	{ I2C_ADV7170 >> 1, (I2C_ADV7170 >> 1) + 1,
	I2C_ADV7171 >> 1, (I2C_ADV7171 >> 1) + 1,
	I2C_CLIENT_END
	};

	static unsigned short ignore = I2C_CLIENT_END;

	static struct i2c_client_address_data addr_data = {
	.normal_i2c = normal_i2c,
	.probe = &ignore,
	.ignore = &ignore,
	};

	static struct i2c_driver i2c_driver_adv7170;

	static int
	adv7170_detect_client (struct i2c_adapter *adapter,
	int address,
	int kind)
	{
	int i;
	struct i2c_client *client;
	struct adv7170 *encoder;
	char *dname;

	dprintk(1,
	KERN_INFO
	"adv7170.c: detecting adv7170 client on address 0x%x\n",
	address << 1);

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	return 0;

	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
	if (client == 0)
	return -ENOMEM;
	client->addr = address;
	client->adapter = adapter;
	client->driver = &i2c_driver_adv7170;
	if ((client->addr == I2C_ADV7170 >> 1) \|\|
	(client->addr == (I2C_ADV7170 >> 1) + 1)) {
	dname = adv7170_name;
	} else if ((client->addr == I2C_ADV7171 >> 1) \|\|
	(client->addr == (I2C_ADV7171 >> 1) + 1)) {
	dname = adv7171_name;
	} else {
	/* We should never get here!!! */
	kfree(client);
	return 0;
	}
	strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));

	encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);
	if (encoder == NULL) {
	kfree(client);
	return -ENOMEM;
	}
	encoder->norm = VIDEO_MODE_NTSC;
	encoder->input = 0;
	encoder->enable = 1;
	i2c_set_clientdata(client, encoder);

	i = i2c_attach_client(client);
	if (i) {
	kfree(client);
	kfree(encoder);
	return i;
	}

	i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));
	if (i >= 0) {
	i = adv7170_write(client, 0x07, TR0MODE \| TR0RST);
	i = adv7170_write(client, 0x07, TR0MODE);
	i = adv7170_read(client, 0x12);
	dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%02x\n",
	I2C_NAME(client), i & 1, client->addr << 1);
	}
	if (i < 0) {
	dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
	I2C_NAME(client), i);
	}

	return 0;
	}

	static int
	adv7170_attach_adapter (struct i2c_adapter *adapter)
	{
	dprintk(1,
	KERN_INFO
	"adv7170.c: starting probe for adapter %s (0x%x)\n",
	I2C_NAME(adapter), adapter->id);
	return i2c_probe(adapter, &addr_data, &adv7170_detect_client);
	}

	static int
	adv7170_detach_client (struct i2c_client *client)
	{
	struct adv7170 *encoder = i2c_get_clientdata(client);
	int err;

	err = i2c_detach_client(client);
	if (err) {
	return err;
	}

	kfree(encoder);
	kfree(client);

	return 0;
	}

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

	static struct i2c_driver i2c_driver_adv7170 = {
	.driver = {
	.name = "adv7170", /* name */
	},

	.id = I2C_DRIVERID_ADV7170,

	.attach_adapter = adv7170_attach_adapter,
	.detach_client = adv7170_detach_client,
	.command = adv7170_command,
	};

	static int __init
	adv7170_init (void)
	{
	return i2c_add_driver(&i2c_driver_adv7170);
	}

	static void __exit
	adv7170_exit (void)
	{
	i2c_del_driver(&i2c_driver_adv7170);
	}

	module_init(adv7170_init);
	module_exit(adv7170_exit);