drivers/media/video/saa7185.c - arm/linux-arm-legacy - Git at Google

 /*
  * saa7185 - Philips SAA7185B video encoder driver version 0.0.3
  *
  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
  *
  * Slight changes for video timing and attachment output by
  * Wolfgang Scherr <scherr@net4you.net>
  *
  * 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/signal.h>
 #include <linux/types.h>
 #include <linux/i2c.h>
 #include <asm/io.h>
 #include <asm/pgtable.h>
 #include <asm/page.h>
 #include <asm/uaccess.h>

 #include <linux/videodev.h>
 #include <linux/video_encoder.h>

 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
 MODULE_AUTHOR("Dave Perks");
 MODULE_LICENSE("GPL");


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


 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 saa7185 {
 	unsigned char reg[128];

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

 #define   I2C_SAA7185        0x88

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

 static inline int
 saa7185_read (struct i2c_client *client)
 {
 	return i2c_smbus_read_byte(client);
 }

 static int
 saa7185_write (struct i2c_client *client,
 	       u8                 reg,
 	       u8                 value)
 {
 	struct saa7185 *encoder = i2c_get_clientdata(client);

 	dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
 	encoder->reg[reg] = value;
 	return i2c_smbus_write_byte_data(client, reg, value);
 }

 static int
 saa7185_write_block (struct i2c_client *client,
 		     const u8          *data,
 		     unsigned int       len)
 {
 	int ret = -1;
 	u8 reg;

 	/* the adv7175 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 saa7185 *encoder = i2c_get_clientdata(client);
 		u8 block_data[32];
 		int block_len;

 		while (len >= 2) {
 			block_len = 0;
 			block_data[block_len++] = reg = data[0];
 			do {
 				block_data[block_len++] =
 				    encoder->reg[reg++] = data[1];
 				len -= 2;
 				data += 2;
 			} while (len >= 2 && data[0] == reg &&
 				 block_len < 32);
 			if ((ret = i2c_master_send(client, block_data,
 						   block_len)) < 0)
 				break;
 		}
 	} else {
 		/* do some slow I2C emulation kind of thing */
 		while (len >= 2) {
 			reg = *data++;
 			if ((ret = saa7185_write(client, reg,
 						 *data++)) < 0)
 				break;
 			len -= 2;
 		}
 	}

 	return ret;
 }

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

 static const unsigned char init_common[] = {
 	0x3a, 0x0f,		/* CBENB=0, V656=0, VY2C=1,
 				 * YUV2C=1, MY2C=1, MUV2C=1 */

 	0x42, 0x6b,		/* OVLY0=107 */
 	0x43, 0x00,		/* OVLU0=0     white */
 	0x44, 0x00,		/* OVLV0=0   */
 	0x45, 0x22,		/* OVLY1=34  */
 	0x46, 0xac,		/* OVLU1=172   yellow */
 	0x47, 0x0e,		/* OVLV1=14  */
 	0x48, 0x03,		/* OVLY2=3   */
 	0x49, 0x1d,		/* OVLU2=29    cyan */
 	0x4a, 0xac,		/* OVLV2=172 */
 	0x4b, 0xf0,		/* OVLY3=240 */
 	0x4c, 0xc8,		/* OVLU3=200   green */
 	0x4d, 0xb9,		/* OVLV3=185 */
 	0x4e, 0xd4,		/* OVLY4=212 */
 	0x4f, 0x38,		/* OVLU4=56    magenta */
 	0x50, 0x47,		/* OVLV4=71  */
 	0x51, 0xc1,		/* OVLY5=193 */
 	0x52, 0xe3,		/* OVLU5=227   red */
 	0x53, 0x54,		/* OVLV5=84  */
 	0x54, 0xa3,		/* OVLY6=163 */
 	0x55, 0x54,		/* OVLU6=84    blue */
 	0x56, 0xf2,		/* OVLV6=242 */
 	0x57, 0x90,		/* OVLY7=144 */
 	0x58, 0x00,		/* OVLU7=0     black */
 	0x59, 0x00,		/* OVLV7=0   */

 	0x5a, 0x00,		/* CHPS=0    */
 	0x5b, 0x76,		/* GAINU=118 */
 	0x5c, 0xa5,		/* GAINV=165 */
 	0x5d, 0x3c,		/* BLCKL=60  */
 	0x5e, 0x3a,		/* BLNNL=58  */
 	0x5f, 0x3a,		/* CCRS=0, BLNVB=58 */
 	0x60, 0x00,		/* NULL      */

 	/* 0x61 - 0x66 set according to norm */

 	0x67, 0x00,		/* 0 : caption 1st byte odd  field */
 	0x68, 0x00,		/* 0 : caption 2nd byte odd  field */
 	0x69, 0x00,		/* 0 : caption 1st byte even field */
 	0x6a, 0x00,		/* 0 : caption 2nd byte even field */

 	0x6b, 0x91,		/* MODIN=2, PCREF=0, SCCLN=17 */
 	0x6c, 0x20,		/* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 				 * CBLF=0, ORCV2=0, PRCV2=0 */
 	0x6d, 0x00,		/* SRCM1=0, CCEN=0 */

 	0x6e, 0x0e,		/* HTRIG=0x005, approx. centered, at
 				 * least for PAL */
 	0x6f, 0x00,		/* HTRIG upper bits */
 	0x70, 0x20,		/* PHRES=0, SBLN=1, VTRIG=0 */

 	/* The following should not be needed */

 	0x71, 0x15,		/* BMRQ=0x115 */
 	0x72, 0x90,		/* EMRQ=0x690 */
 	0x73, 0x61,		/* EMRQ=0x690, BMRQ=0x115 */
 	0x74, 0x00,		/* NULL       */
 	0x75, 0x00,		/* NULL       */
 	0x76, 0x00,		/* NULL       */
 	0x77, 0x15,		/* BRCV=0x115 */
 	0x78, 0x90,		/* ERCV=0x690 */
 	0x79, 0x61,		/* ERCV=0x690, BRCV=0x115 */

 	/* Field length controls */

 	0x7a, 0x70,		/* FLC=0 */

 	/* The following should not be needed if SBLN = 1 */

 	0x7b, 0x16,		/* FAL=22 */
 	0x7c, 0x35,		/* LAL=244 */
 	0x7d, 0x20,		/* LAL=244, FAL=22 */
 };

 static const unsigned char init_pal[] = {
 	0x61, 0x1e,		/* FISE=0, PAL=1, SCBW=1, RTCE=1,
 				 * YGS=1, INPI=0, DOWN=0 */
 	0x62, 0xc8,		/* DECTYP=1, BSTA=72 */
 	0x63, 0xcb,		/* FSC0 */
 	0x64, 0x8a,		/* FSC1 */
 	0x65, 0x09,		/* FSC2 */
 	0x66, 0x2a,		/* FSC3 */
 };

 static const unsigned char init_ntsc[] = {
 	0x61, 0x1d,		/* FISE=1, PAL=0, SCBW=1, RTCE=1,
 				 * YGS=1, INPI=0, DOWN=0 */
 	0x62, 0xe6,		/* DECTYP=1, BSTA=102 */
 	0x63, 0x1f,		/* FSC0 */
 	0x64, 0x7c,		/* FSC1 */
 	0x65, 0xf0,		/* FSC2 */
 	0x66, 0x21,		/* FSC3 */
 };

 static int
 saa7185_command (struct i2c_client *client,
 		 unsigned int       cmd,
 		 void              *arg)
 {
 	struct saa7185 *encoder = i2c_get_clientdata(client);

 	switch (cmd) {

 	case 0:
 		saa7185_write_block(client, init_common,
 				    sizeof(init_common));
 		switch (encoder->norm) {

 		case VIDEO_MODE_NTSC:
 			saa7185_write_block(client, init_ntsc,
 					    sizeof(init_ntsc));
 			break;

 		case VIDEO_MODE_PAL:
 			saa7185_write_block(client, init_pal,
 					    sizeof(init_pal));
 			break;
 		}

 		break;

 	case ENCODER_GET_CAPABILITIES:
 	{
 		struct video_encoder_capability *cap = arg;

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

 	case ENCODER_SET_NORM:
 	{
 		int *iarg = arg;

 		//saa7185_write_block(client, init_common, sizeof(init_common));

 		switch (*iarg) {

 		case VIDEO_MODE_NTSC:
 			saa7185_write_block(client, init_ntsc,
 					    sizeof(init_ntsc));
 			break;

 		case VIDEO_MODE_PAL:
 			saa7185_write_block(client, init_pal,
 					    sizeof(init_pal));
 			break;

 		case VIDEO_MODE_SECAM:
 		default:
 			return -EINVAL;

 		}
 		encoder->norm = *iarg;
 	}
 		break;

 	case ENCODER_SET_INPUT:
 	{
 		int *iarg = arg;

 		/* RJ: *iarg = 0: input is from SA7111
 		 *iarg = 1: input is from ZR36060 */

 		switch (*iarg) {

 		case 0:
 			/* Switch RTCE to 1 */
 			saa7185_write(client, 0x61,
 				      (encoder->reg[0x61] & 0xf7) | 0x08);
 			saa7185_write(client, 0x6e, 0x01);
 			break;

 		case 1:
 			/* Switch RTCE to 0 */
 			saa7185_write(client, 0x61,
 				      (encoder->reg[0x61] & 0xf7) | 0x00);
 			/* SW: a slight sync problem... */
 			saa7185_write(client, 0x6e, 0x00);
 			break;

 		default:
 			return -EINVAL;

 		}
 	}
 		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;
 		saa7185_write(client, 0x61,
 			      (encoder->reg[0x61] & 0xbf) |
 			      (encoder->enable ? 0x00 : 0x40));
 	}
 		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_SAA7185 >> 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_saa7185;

 static int
 saa7185_detect_client (struct i2c_adapter *adapter,
 		       int                 address,
 		       int                 kind)
 {
 	int i;
 	struct i2c_client *client;
 	struct saa7185 *encoder;

 	dprintk(1,
 		KERN_INFO
 		"saa7185.c: detecting saa7185 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_saa7185;
 	strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));

 	encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 	if (encoder == NULL) {
 		kfree(client);
 		return -ENOMEM;
 	}
 	encoder->norm = VIDEO_MODE_NTSC;
 	encoder->enable = 1;
 	i2c_set_clientdata(client, encoder);

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

 	i = saa7185_write_block(client, init_common, sizeof(init_common));
 	if (i >= 0) {
 		i = saa7185_write_block(client, init_ntsc,
 					sizeof(init_ntsc));
 	}
 	if (i < 0) {
 		dprintk(1, KERN_ERR "%s_attach: init error %d\n",
 			I2C_NAME(client), i);
 	} else {
 		dprintk(1,
 			KERN_INFO
 			"%s_attach: chip version %d at address 0x%x\n",
 			I2C_NAME(client), saa7185_read(client) >> 5,
 			client->addr << 1);
 	}

 	return 0;
 }

 static int
 saa7185_attach_adapter (struct i2c_adapter *adapter)
 {
 	dprintk(1,
 		KERN_INFO
 		"saa7185.c: starting probe for adapter %s (0x%x)\n",
 		I2C_NAME(adapter), adapter->id);
 	return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
 }

 static int
 saa7185_detach_client (struct i2c_client *client)
 {
 	struct saa7185 *encoder = i2c_get_clientdata(client);
 	int err;

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

 	saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40);	/* SW: output off is active */
 	//saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */

 	kfree(encoder);
 	kfree(client);

 	return 0;
 }

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

 static struct i2c_driver i2c_driver_saa7185 = {
 	.driver = {
 		.name = "saa7185",	/* name */
 	},

 	.id = I2C_DRIVERID_SAA7185B,

 	.attach_adapter = saa7185_attach_adapter,
 	.detach_client = saa7185_detach_client,
 	.command = saa7185_command,
 };

 static int __init
 saa7185_init (void)
 {
 	return i2c_add_driver(&i2c_driver_saa7185);
 }

 static void __exit
 saa7185_exit (void)
 {
 	i2c_del_driver(&i2c_driver_saa7185);
 }

 module_init(saa7185_init);
 module_exit(saa7185_exit);
	/*
	* saa7185 - Philips SAA7185B video encoder driver version 0.0.3
	*
	* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
	*
	* Slight changes for video timing and attachment output by
	* Wolfgang Scherr <scherr@net4you.net>
	*
	* 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/signal.h>
	#include <linux/types.h>
	#include <linux/i2c.h>
	#include <asm/io.h>
	#include <asm/pgtable.h>
	#include <asm/page.h>
	#include <asm/uaccess.h>

	#include <linux/videodev.h>
	#include <linux/video_encoder.h>

	MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
	MODULE_AUTHOR("Dave Perks");
	MODULE_LICENSE("GPL");


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


	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 saa7185 {
	unsigned char reg[128];

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

	#define I2C_SAA7185 0x88

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

	static inline int
	saa7185_read (struct i2c_client *client)
	{
	return i2c_smbus_read_byte(client);
	}

	static int
	saa7185_write (struct i2c_client *client,
	u8 reg,
	u8 value)
	{
	struct saa7185 *encoder = i2c_get_clientdata(client);

	dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
	encoder->reg[reg] = value;
	return i2c_smbus_write_byte_data(client, reg, value);
	}

	static int
	saa7185_write_block (struct i2c_client *client,
	const u8 *data,
	unsigned int len)
	{
	int ret = -1;
	u8 reg;

	/* the adv7175 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 saa7185 *encoder = i2c_get_clientdata(client);
	u8 block_data[32];
	int block_len;

	while (len >= 2) {
	block_len = 0;
	block_data[block_len++] = reg = data[0];
	do {
	block_data[block_len++] =
	encoder->reg[reg++] = data[1];
	len -= 2;
	data += 2;
	} while (len >= 2 && data[0] == reg &&
	block_len < 32);
	if ((ret = i2c_master_send(client, block_data,
	block_len)) < 0)
	break;
	}
	} else {
	/* do some slow I2C emulation kind of thing */
	while (len >= 2) {
	reg = *data++;
	if ((ret = saa7185_write(client, reg,
	*data++)) < 0)
	break;
	len -= 2;
	}
	}

	return ret;
	}

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

	static const unsigned char init_common[] = {
	0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1,
	* YUV2C=1, MY2C=1, MUV2C=1 */

	0x42, 0x6b, /* OVLY0=107 */
	0x43, 0x00, /* OVLU0=0 white */
	0x44, 0x00, /* OVLV0=0 */
	0x45, 0x22, /* OVLY1=34 */
	0x46, 0xac, /* OVLU1=172 yellow */
	0x47, 0x0e, /* OVLV1=14 */
	0x48, 0x03, /* OVLY2=3 */
	0x49, 0x1d, /* OVLU2=29 cyan */
	0x4a, 0xac, /* OVLV2=172 */
	0x4b, 0xf0, /* OVLY3=240 */
	0x4c, 0xc8, /* OVLU3=200 green */
	0x4d, 0xb9, /* OVLV3=185 */
	0x4e, 0xd4, /* OVLY4=212 */
	0x4f, 0x38, /* OVLU4=56 magenta */
	0x50, 0x47, /* OVLV4=71 */
	0x51, 0xc1, /* OVLY5=193 */
	0x52, 0xe3, /* OVLU5=227 red */
	0x53, 0x54, /* OVLV5=84 */
	0x54, 0xa3, /* OVLY6=163 */
	0x55, 0x54, /* OVLU6=84 blue */
	0x56, 0xf2, /* OVLV6=242 */
	0x57, 0x90, /* OVLY7=144 */
	0x58, 0x00, /* OVLU7=0 black */
	0x59, 0x00, /* OVLV7=0 */

	0x5a, 0x00, /* CHPS=0 */
	0x5b, 0x76, /* GAINU=118 */
	0x5c, 0xa5, /* GAINV=165 */
	0x5d, 0x3c, /* BLCKL=60 */
	0x5e, 0x3a, /* BLNNL=58 */
	0x5f, 0x3a, /* CCRS=0, BLNVB=58 */
	0x60, 0x00, /* NULL */

	/* 0x61 - 0x66 set according to norm */

	0x67, 0x00, /* 0 : caption 1st byte odd field */
	0x68, 0x00, /* 0 : caption 2nd byte odd field */
	0x69, 0x00, /* 0 : caption 1st byte even field */
	0x6a, 0x00, /* 0 : caption 2nd byte even field */

	0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */
	0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
	* CBLF=0, ORCV2=0, PRCV2=0 */
	0x6d, 0x00, /* SRCM1=0, CCEN=0 */

	0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at
	* least for PAL */
	0x6f, 0x00, /* HTRIG upper bits */
	0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */

	/* The following should not be needed */

	0x71, 0x15, /* BMRQ=0x115 */
	0x72, 0x90, /* EMRQ=0x690 */
	0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */
	0x74, 0x00, /* NULL */
	0x75, 0x00, /* NULL */
	0x76, 0x00, /* NULL */
	0x77, 0x15, /* BRCV=0x115 */
	0x78, 0x90, /* ERCV=0x690 */
	0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */

	/* Field length controls */

	0x7a, 0x70, /* FLC=0 */

	/* The following should not be needed if SBLN = 1 */

	0x7b, 0x16, /* FAL=22 */
	0x7c, 0x35, /* LAL=244 */
	0x7d, 0x20, /* LAL=244, FAL=22 */
	};

	static const unsigned char init_pal[] = {
	0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1,
	* YGS=1, INPI=0, DOWN=0 */
	0x62, 0xc8, /* DECTYP=1, BSTA=72 */
	0x63, 0xcb, /* FSC0 */
	0x64, 0x8a, /* FSC1 */
	0x65, 0x09, /* FSC2 */
	0x66, 0x2a, /* FSC3 */
	};

	static const unsigned char init_ntsc[] = {
	0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1,
	* YGS=1, INPI=0, DOWN=0 */
	0x62, 0xe6, /* DECTYP=1, BSTA=102 */
	0x63, 0x1f, /* FSC0 */
	0x64, 0x7c, /* FSC1 */
	0x65, 0xf0, /* FSC2 */
	0x66, 0x21, /* FSC3 */
	};

	static int
	saa7185_command (struct i2c_client *client,
	unsigned int cmd,
	void *arg)
	{
	struct saa7185 *encoder = i2c_get_clientdata(client);

	switch (cmd) {

	case 0:
	saa7185_write_block(client, init_common,
	sizeof(init_common));
	switch (encoder->norm) {

	case VIDEO_MODE_NTSC:
	saa7185_write_block(client, init_ntsc,
	sizeof(init_ntsc));
	break;

	case VIDEO_MODE_PAL:
	saa7185_write_block(client, init_pal,
	sizeof(init_pal));
	break;
	}

	break;

	case ENCODER_GET_CAPABILITIES:
	{
	struct video_encoder_capability *cap = arg;

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

	case ENCODER_SET_NORM:
	{
	int *iarg = arg;

	//saa7185_write_block(client, init_common, sizeof(init_common));

	switch (*iarg) {

	case VIDEO_MODE_NTSC:
	saa7185_write_block(client, init_ntsc,
	sizeof(init_ntsc));
	break;

	case VIDEO_MODE_PAL:
	saa7185_write_block(client, init_pal,
	sizeof(init_pal));
	break;

	case VIDEO_MODE_SECAM:
	default:
	return -EINVAL;

	}
	encoder->norm = *iarg;
	}
	break;

	case ENCODER_SET_INPUT:
	{
	int *iarg = arg;

	/* RJ: *iarg = 0: input is from SA7111
	iarg = 1: input is from ZR36060 /

	switch (*iarg) {

	case 0:
	/* Switch RTCE to 1 */
	saa7185_write(client, 0x61,
	(encoder->reg[0x61] & 0xf7) \| 0x08);
	saa7185_write(client, 0x6e, 0x01);
	break;

	case 1:
	/* Switch RTCE to 0 */
	saa7185_write(client, 0x61,
	(encoder->reg[0x61] & 0xf7) \| 0x00);
	/* SW: a slight sync problem... */
	saa7185_write(client, 0x6e, 0x00);
	break;

	default:
	return -EINVAL;

	}
	}
	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;
	saa7185_write(client, 0x61,
	(encoder->reg[0x61] & 0xbf) \|
	(encoder->enable ? 0x00 : 0x40));
	}
	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_SAA7185 >> 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_saa7185;

	static int
	saa7185_detect_client (struct i2c_adapter *adapter,
	int address,
	int kind)
	{
	int i;
	struct i2c_client *client;
	struct saa7185 *encoder;

	dprintk(1,
	KERN_INFO
	"saa7185.c: detecting saa7185 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_saa7185;
	strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));

	encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
	if (encoder == NULL) {
	kfree(client);
	return -ENOMEM;
	}
	encoder->norm = VIDEO_MODE_NTSC;
	encoder->enable = 1;
	i2c_set_clientdata(client, encoder);

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

	i = saa7185_write_block(client, init_common, sizeof(init_common));
	if (i >= 0) {
	i = saa7185_write_block(client, init_ntsc,
	sizeof(init_ntsc));
	}
	if (i < 0) {
	dprintk(1, KERN_ERR "%s_attach: init error %d\n",
	I2C_NAME(client), i);
	} else {
	dprintk(1,
	KERN_INFO
	"%s_attach: chip version %d at address 0x%x\n",
	I2C_NAME(client), saa7185_read(client) >> 5,
	client->addr << 1);
	}

	return 0;
	}

	static int
	saa7185_attach_adapter (struct i2c_adapter *adapter)
	{
	dprintk(1,
	KERN_INFO
	"saa7185.c: starting probe for adapter %s (0x%x)\n",
	I2C_NAME(adapter), adapter->id);
	return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
	}

	static int
	saa7185_detach_client (struct i2c_client *client)
	{
	struct saa7185 *encoder = i2c_get_clientdata(client);
	int err;

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

	saa7185_write(client, 0x61, (encoder->reg[0x61]) \| 0x40); /* SW: output off is active */
	//saa7185_write(client, 0x3a, (encoder->reg[0x3a]) \| 0x80); /* SW: color bar */

	kfree(encoder);
	kfree(client);

	return 0;
	}

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

	static struct i2c_driver i2c_driver_saa7185 = {
	.driver = {
	.name = "saa7185", /* name */
	},

	.id = I2C_DRIVERID_SAA7185B,

	.attach_adapter = saa7185_attach_adapter,
	.detach_client = saa7185_detach_client,
	.command = saa7185_command,
	};

	static int __init
	saa7185_init (void)
	{
	return i2c_add_driver(&i2c_driver_saa7185);
	}

	static void __exit
	saa7185_exit (void)
	{
	i2c_del_driver(&i2c_driver_saa7185);
	}

	module_init(saa7185_init);
	module_exit(saa7185_exit);