drivers/media/video/saa7185.c - kernel/skids - 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/types.h>
 #include <linux/slab.h>
 #include <linux/ioctl.h>
 #include <asm/uaccess.h>
 #include <linux/i2c.h>
 #include <linux/i2c-id.h>
 #include <linux/videodev2.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-chip-ident.h>
 #include <media/v4l2-i2c-drv.h>

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

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


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

 struct saa7185 {
 	struct v4l2_subdev sd;
 	unsigned char reg[128];

 	v4l2_std_id norm;
 };

 static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
 {
 	return container_of(sd, struct saa7185, sd);
 }

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

 static inline int saa7185_read(struct v4l2_subdev *sd)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);

 	return i2c_smbus_read_byte(client);
 }

 static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	struct saa7185 *encoder = to_saa7185(sd);

 	v4l2_dbg(1, debug, sd, "%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 v4l2_subdev *sd,
 		const u8 *data, unsigned int len)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	struct saa7185 *encoder = to_saa7185(sd);
 	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 */
 		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);
 			ret = i2c_master_send(client, block_data, block_len);
 			if (ret < 0)
 				break;
 		}
 	} else {
 		/* do some slow I2C emulation kind of thing */
 		while (len >= 2) {
 			reg = *data++;
 			ret = saa7185_write(sd, reg, *data++);
 			if (ret < 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_init(struct v4l2_subdev *sd, u32 val)
 {
 	struct saa7185 *encoder = to_saa7185(sd);

 	saa7185_write_block(sd, init_common, sizeof(init_common));
 	if (encoder->norm & V4L2_STD_NTSC)
 		saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 	else
 		saa7185_write_block(sd, init_pal, sizeof(init_pal));
 	return 0;
 }

 static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 {
 	struct saa7185 *encoder = to_saa7185(sd);

 	if (std & V4L2_STD_NTSC)
 		saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 	else if (std & V4L2_STD_PAL)
 		saa7185_write_block(sd, init_pal, sizeof(init_pal));
 	else
 		return -EINVAL;
 	encoder->norm = std;
 	return 0;
 }

 static int saa7185_s_routing(struct v4l2_subdev *sd,
 			     u32 input, u32 output, u32 config)
 {
 	struct saa7185 *encoder = to_saa7185(sd);

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

 	switch (input) {
 	case 0:
 		/* turn off colorbar */
 		saa7185_write(sd, 0x3a, 0x0f);
 		/* Switch RTCE to 1 */
 		saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 		saa7185_write(sd, 0x6e, 0x01);
 		break;

 	case 1:
 		/* turn off colorbar */
 		saa7185_write(sd, 0x3a, 0x0f);
 		/* Switch RTCE to 0 */
 		saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
 		/* SW: a slight sync problem... */
 		saa7185_write(sd, 0x6e, 0x00);
 		break;

 	case 2:
 		/* turn on colorbar */
 		saa7185_write(sd, 0x3a, 0x8f);
 		/* Switch RTCE to 0 */
 		saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 		/* SW: a slight sync problem... */
 		saa7185_write(sd, 0x6e, 0x01);
 		break;

 	default:
 		return -EINVAL;
 	}
 	return 0;
 }

 static int saa7185_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_SAA7185, 0);
 }

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

 static const struct v4l2_subdev_core_ops saa7185_core_ops = {
 	.g_chip_ident = saa7185_g_chip_ident,
 	.init = saa7185_init,
 };

 static const struct v4l2_subdev_video_ops saa7185_video_ops = {
 	.s_std_output = saa7185_s_std_output,
 	.s_routing = saa7185_s_routing,
 };

 static const struct v4l2_subdev_ops saa7185_ops = {
 	.core = &saa7185_core_ops,
 	.video = &saa7185_video_ops,
 };


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

 static int saa7185_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
 	int i;
 	struct saa7185 *encoder;
 	struct v4l2_subdev *sd;

 	/* Check if the adapter supports the needed features */
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 		return -ENODEV;

 	v4l_info(client, "chip found @ 0x%x (%s)\n",
 			client->addr << 1, client->adapter->name);

 	encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 	if (encoder == NULL)
 		return -ENOMEM;
 	encoder->norm = V4L2_STD_NTSC;
 	sd = &encoder->sd;
 	v4l2_i2c_subdev_init(sd, client, &saa7185_ops);

 	i = saa7185_write_block(sd, init_common, sizeof(init_common));
 	if (i >= 0)
 		i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 	if (i < 0)
 		v4l2_dbg(1, debug, sd, "init error %d\n", i);
 	else
 		v4l2_dbg(1, debug, sd, "revision 0x%x\n",
 				saa7185_read(sd) >> 5);
 	return 0;
 }

 static int saa7185_remove(struct i2c_client *client)
 {
 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
 	struct saa7185 *encoder = to_saa7185(sd);

 	v4l2_device_unregister_subdev(sd);
 	/* SW: output off is active */
 	saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
 	kfree(encoder);
 	return 0;
 }

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

 static const struct i2c_device_id saa7185_id[] = {
 	{ "saa7185", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, saa7185_id);

 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 	.name = "saa7185",
 	.probe = saa7185_probe,
 	.remove = saa7185_remove,
 	.id_table = saa7185_id,
 };
	/*
	* 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/types.h>
	#include <linux/slab.h>
	#include <linux/ioctl.h>
	#include <asm/uaccess.h>
	#include <linux/i2c.h>
	#include <linux/i2c-id.h>
	#include <linux/videodev2.h>
	#include <media/v4l2-device.h>
	#include <media/v4l2-chip-ident.h>
	#include <media/v4l2-i2c-drv.h>

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

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


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

	struct saa7185 {
	struct v4l2_subdev sd;
	unsigned char reg[128];

	v4l2_std_id norm;
	};

	static inline struct saa7185 to_saa7185(struct v4l2_subdev sd)
	{
	return container_of(sd, struct saa7185, sd);
	}

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

	static inline int saa7185_read(struct v4l2_subdev *sd)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return i2c_smbus_read_byte(client);
	}

	static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct saa7185 *encoder = to_saa7185(sd);

	v4l2_dbg(1, debug, sd, "%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 v4l2_subdev *sd,
	const u8 *data, unsigned int len)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct saa7185 *encoder = to_saa7185(sd);
	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 */
	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);
	ret = i2c_master_send(client, block_data, block_len);
	if (ret < 0)
	break;
	}
	} else {
	/* do some slow I2C emulation kind of thing */
	while (len >= 2) {
	reg = *data++;
	ret = saa7185_write(sd, reg, *data++);
	if (ret < 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_init(struct v4l2_subdev *sd, u32 val)
	{
	struct saa7185 *encoder = to_saa7185(sd);

	saa7185_write_block(sd, init_common, sizeof(init_common));
	if (encoder->norm & V4L2_STD_NTSC)
	saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
	else
	saa7185_write_block(sd, init_pal, sizeof(init_pal));
	return 0;
	}

	static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
	{
	struct saa7185 *encoder = to_saa7185(sd);

	if (std & V4L2_STD_NTSC)
	saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
	else if (std & V4L2_STD_PAL)
	saa7185_write_block(sd, init_pal, sizeof(init_pal));
	else
	return -EINVAL;
	encoder->norm = std;
	return 0;
	}

	static int saa7185_s_routing(struct v4l2_subdev *sd,
	u32 input, u32 output, u32 config)
	{
	struct saa7185 *encoder = to_saa7185(sd);

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

	switch (input) {
	case 0:
	/* turn off colorbar */
	saa7185_write(sd, 0x3a, 0x0f);
	/* Switch RTCE to 1 */
	saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) \| 0x08);
	saa7185_write(sd, 0x6e, 0x01);
	break;

	case 1:
	/* turn off colorbar */
	saa7185_write(sd, 0x3a, 0x0f);
	/* Switch RTCE to 0 */
	saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) \| 0x00);
	/* SW: a slight sync problem... */
	saa7185_write(sd, 0x6e, 0x00);
	break;

	case 2:
	/* turn on colorbar */
	saa7185_write(sd, 0x3a, 0x8f);
	/* Switch RTCE to 0 */
	saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) \| 0x08);
	/* SW: a slight sync problem... */
	saa7185_write(sd, 0x6e, 0x01);
	break;

	default:
	return -EINVAL;
	}
	return 0;
	}

	static int saa7185_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_SAA7185, 0);
	}

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

	static const struct v4l2_subdev_core_ops saa7185_core_ops = {
	.g_chip_ident = saa7185_g_chip_ident,
	.init = saa7185_init,
	};

	static const struct v4l2_subdev_video_ops saa7185_video_ops = {
	.s_std_output = saa7185_s_std_output,
	.s_routing = saa7185_s_routing,
	};

	static const struct v4l2_subdev_ops saa7185_ops = {
	.core = &saa7185_core_ops,
	.video = &saa7185_video_ops,
	};


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

	static int saa7185_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	int i;
	struct saa7185 *encoder;
	struct v4l2_subdev *sd;

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	return -ENODEV;

	v4l_info(client, "chip found @ 0x%x (%s)\n",
	client->addr << 1, client->adapter->name);

	encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
	if (encoder == NULL)
	return -ENOMEM;
	encoder->norm = V4L2_STD_NTSC;
	sd = &encoder->sd;
	v4l2_i2c_subdev_init(sd, client, &saa7185_ops);

	i = saa7185_write_block(sd, init_common, sizeof(init_common));
	if (i >= 0)
	i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
	if (i < 0)
	v4l2_dbg(1, debug, sd, "init error %d\n", i);
	else
	v4l2_dbg(1, debug, sd, "revision 0x%x\n",
	saa7185_read(sd) >> 5);
	return 0;
	}

	static int saa7185_remove(struct i2c_client *client)
	{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct saa7185 *encoder = to_saa7185(sd);

	v4l2_device_unregister_subdev(sd);
	/* SW: output off is active */
	saa7185_write(sd, 0x61, (encoder->reg[0x61]) \| 0x40);
	kfree(encoder);
	return 0;
	}

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

	static const struct i2c_device_id saa7185_id[] = {
	{ "saa7185", 0 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, saa7185_id);

	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "saa7185",
	.probe = saa7185_probe,
	.remove = saa7185_remove,
	.id_table = saa7185_id,
	};