drivers/media/video/saa7110.c - kernel/msm-4.9 - Gitiles

 /*
  * saa7110 - Philips SAA7110(A) video decoder driver
  *
  * Copyright (C) 1998 Pauline Middelink <middelin@polyware.nl>
  *
  * 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/types.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
 #include <linux/wait.h>
 #include <asm/uaccess.h>
 #include <linux/i2c.h>
 #include <linux/videodev.h>
 #include <linux/video_decoder.h>
 #include <media/v4l2-common.h>
 #include <media/v4l2-i2c-drv-legacy.h>

 MODULE_DESCRIPTION("Philips SAA7110 video decoder driver");
 MODULE_AUTHOR("Pauline Middelink");
 MODULE_LICENSE("GPL");

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

 #define SAA7110_MAX_INPUT	9	/* 6 CVBS, 3 SVHS */
 #define SAA7110_MAX_OUTPUT	1	/* 1 YUV */

 #define SAA7110_NR_REG		0x35

 struct saa7110 {
 	u8 reg[SAA7110_NR_REG];

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

 	wait_queue_head_t wq;
 };

 /* ----------------------------------------------------------------------- */
 /* I2C support functions						   */
 /* ----------------------------------------------------------------------- */

 static int saa7110_write(struct i2c_client *client, u8 reg, u8 value)
 {
 	struct saa7110 *decoder = i2c_get_clientdata(client);

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

 static int saa7110_write_block(struct i2c_client *client, const u8 *data, unsigned int len)
 {
 	int ret = -1;
 	u8 reg = *data;		/* first register to write to */

 	/* Sanity check */
 	if (reg + (len - 1) > SAA7110_NR_REG)
 		return ret;

 	/* the saa7110 has an autoincrement function, use it if
 	 * the adapter understands raw I2C */
 	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 		struct saa7110 *decoder = i2c_get_clientdata(client);

 		ret = i2c_master_send(client, data, len);

 		/* Cache the written data */
 		memcpy(decoder->reg + reg, data + 1, len - 1);
 	} else {
 		for (++data, --len; len; len--) {
 			ret = saa7110_write(client, reg++, *data++);
 			if (ret < 0)
 				break;
 		}
 	}

 	return ret;
 }

 static inline int saa7110_read(struct i2c_client *client)
 {
 	return i2c_smbus_read_byte(client);
 }

 /* ----------------------------------------------------------------------- */
 /* SAA7110 functions							   */
 /* ----------------------------------------------------------------------- */

 #define FRESP_06H_COMPST 0x03	//0x13
 #define FRESP_06H_SVIDEO 0x83	//0xC0


 static int saa7110_selmux(struct i2c_client *client, int chan)
 {
 	static const unsigned char modes[9][8] = {
 		/* mode 0 */
 		{FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 			      0x44, 0x75, 0x16},
 		/* mode 1 */
 		{FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 			      0x44, 0x75, 0x16},
 		/* mode 2 */
 		{FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 			      0x60, 0xB5, 0x05},
 		/* mode 3 */
 		{FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 			      0x60, 0xB5, 0x05},
 		/* mode 4 */
 		{FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 			      0x60, 0xB5, 0x03},
 		/* mode 5 */
 		{FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 			      0x60, 0xB5, 0x03},
 		/* mode 6 */
 		{FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 			      0x44, 0x75, 0x12},
 		/* mode 7 */
 		{FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 			      0x60, 0xB5, 0x14},
 		/* mode 8 */
 		{FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 			      0x44, 0x75, 0x21}
 	};
 	struct saa7110 *decoder = i2c_get_clientdata(client);
 	const unsigned char *ptr = modes[chan];

 	saa7110_write(client, 0x06, ptr[0]);	/* Luminance control    */
 	saa7110_write(client, 0x20, ptr[1]);	/* Analog Control #1    */
 	saa7110_write(client, 0x21, ptr[2]);	/* Analog Control #2    */
 	saa7110_write(client, 0x22, ptr[3]);	/* Mixer Control #1     */
 	saa7110_write(client, 0x2C, ptr[4]);	/* Mixer Control #2     */
 	saa7110_write(client, 0x30, ptr[5]);	/* ADCs gain control    */
 	saa7110_write(client, 0x31, ptr[6]);	/* Mixer Control #3     */
 	saa7110_write(client, 0x21, ptr[7]);	/* Analog Control #2    */
 	decoder->input = chan;

 	return 0;
 }

 static const unsigned char initseq[1 + SAA7110_NR_REG] = {
 	0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 	/* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 	/* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 	/* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 	/* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 	/* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 	/* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 };

 static int determine_norm(struct i2c_client *client)
 {
 	DEFINE_WAIT(wait);
 	struct saa7110 *decoder = i2c_get_clientdata(client);
 	int status;

 	/* mode changed, start automatic detection */
 	saa7110_write_block(client, initseq, sizeof(initseq));
 	saa7110_selmux(client, decoder->input);
 	prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 	schedule_timeout(msecs_to_jiffies(250));
 	finish_wait(&decoder->wq, &wait);
 	status = saa7110_read(client);
 	if (status & 0x40) {
 		v4l_dbg(1, debug, client, "status=0x%02x (no signal)\n", status);
 		return decoder->norm;	// no change
 	}
 	if ((status & 3) == 0) {
 		saa7110_write(client, 0x06, 0x83);
 		if (status & 0x20) {
 			v4l_dbg(1, debug, client, "status=0x%02x (NTSC/no color)\n", status);
 			//saa7110_write(client,0x2E,0x81);
 			return VIDEO_MODE_NTSC;
 		}
 		v4l_dbg(1, debug, client, "status=0x%02x (PAL/no color)\n", status);
 		//saa7110_write(client,0x2E,0x9A);
 		return VIDEO_MODE_PAL;
 	}
 	//saa7110_write(client,0x06,0x03);
 	if (status & 0x20) {	/* 60Hz */
 		v4l_dbg(1, debug, client, "status=0x%02x (NTSC)\n", status);
 		saa7110_write(client, 0x0D, 0x86);
 		saa7110_write(client, 0x0F, 0x50);
 		saa7110_write(client, 0x11, 0x2C);
 		//saa7110_write(client,0x2E,0x81);
 		return VIDEO_MODE_NTSC;
 	}

 	/* 50Hz -> PAL/SECAM */
 	saa7110_write(client, 0x0D, 0x86);
 	saa7110_write(client, 0x0F, 0x10);
 	saa7110_write(client, 0x11, 0x59);
 	//saa7110_write(client,0x2E,0x9A);

 	prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 	schedule_timeout(msecs_to_jiffies(250));
 	finish_wait(&decoder->wq, &wait);

 	status = saa7110_read(client);
 	if ((status & 0x03) == 0x01) {
 		v4l_dbg(1, debug, client, "status=0x%02x (SECAM)\n", status);
 		saa7110_write(client, 0x0D, 0x87);
 		return VIDEO_MODE_SECAM;
 	}
 	v4l_dbg(1, debug, client, "status=0x%02x (PAL)\n", status);
 	return VIDEO_MODE_PAL;
 }

 static int
 saa7110_command (struct i2c_client *client,
 		 unsigned int       cmd,
 		 void              *arg)
 {
 	struct saa7110 *decoder = i2c_get_clientdata(client);
 	int v;

 	switch (cmd) {
 	case 0:
 		//saa7110_write_block(client, initseq, sizeof(initseq));
 		break;

 	case DECODER_GET_CAPABILITIES:
 	{
 		struct video_decoder_capability *dc = arg;

 		dc->flags =
 		    VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC |
 		    VIDEO_DECODER_SECAM | VIDEO_DECODER_AUTO;
 		dc->inputs = SAA7110_MAX_INPUT;
 		dc->outputs = SAA7110_MAX_OUTPUT;
 		break;
 	}

 	case DECODER_GET_STATUS:
 	{
 		int status;
 		int res = 0;

 		status = saa7110_read(client);
 		v4l_dbg(1, debug, client, "status=0x%02x norm=%d\n",
 			       status, decoder->norm);
 		if (!(status & 0x40))
 			res |= DECODER_STATUS_GOOD;
 		if (status & 0x03)
 			res |= DECODER_STATUS_COLOR;

 		switch (decoder->norm) {
 		case VIDEO_MODE_NTSC:
 			res |= DECODER_STATUS_NTSC;
 			break;
 		case VIDEO_MODE_PAL:
 			res |= DECODER_STATUS_PAL;
 			break;
 		case VIDEO_MODE_SECAM:
 			res |= DECODER_STATUS_SECAM;
 			break;
 		}
 		*(int *) arg = res;
 		break;
 	}

 	case DECODER_SET_NORM:
 		v = *(int *) arg;
 		if (decoder->norm != v) {
 			decoder->norm = v;
 			//saa7110_write(client, 0x06, 0x03);
 			switch (v) {
 			case VIDEO_MODE_NTSC:
 				saa7110_write(client, 0x0D, 0x86);
 				saa7110_write(client, 0x0F, 0x50);
 				saa7110_write(client, 0x11, 0x2C);
 				//saa7110_write(client, 0x2E, 0x81);
 				v4l_dbg(1, debug, client, "switched to NTSC\n");
 				break;
 			case VIDEO_MODE_PAL:
 				saa7110_write(client, 0x0D, 0x86);
 				saa7110_write(client, 0x0F, 0x10);
 				saa7110_write(client, 0x11, 0x59);
 				//saa7110_write(client, 0x2E, 0x9A);
 				v4l_dbg(1, debug, client, "switched to PAL\n");
 				break;
 			case VIDEO_MODE_SECAM:
 				saa7110_write(client, 0x0D, 0x87);
 				saa7110_write(client, 0x0F, 0x10);
 				saa7110_write(client, 0x11, 0x59);
 				//saa7110_write(client, 0x2E, 0x9A);
 				v4l_dbg(1, debug, client, "switched to SECAM\n");
 				break;
 			case VIDEO_MODE_AUTO:
 				v4l_dbg(1, debug, client, "switched to AUTO\n");
 				decoder->norm = determine_norm(client);
 				*(int *) arg = decoder->norm;
 				break;
 			default:
 				return -EPERM;
 			}
 		}
 		break;

 	case DECODER_SET_INPUT:
 		v = *(int *) arg;
 		if (v < 0 || v >= SAA7110_MAX_INPUT) {
 			v4l_dbg(1, debug, client, "input=%d not available\n", v);
 			return -EINVAL;
 		}
 		if (decoder->input != v) {
 			saa7110_selmux(client, v);
 			v4l_dbg(1, debug, client, "switched to input=%d\n", v);
 		}
 		break;

 	case DECODER_SET_OUTPUT:
 		v = *(int *) arg;
 		/* not much choice of outputs */
 		if (v != 0)
 			return -EINVAL;
 		break;

 	case DECODER_ENABLE_OUTPUT:
 		v = *(int *) arg;
 		if (decoder->enable != v) {
 			decoder->enable = v;
 			saa7110_write(client, 0x0E, v ? 0x18 : 0x80);
 			v4l_dbg(1, debug, client, "YUV %s\n", v ? "on" : "off");
 		}
 		break;

 	case DECODER_SET_PICTURE:
 	{
 		struct video_picture *pic = arg;

 		if (decoder->bright != pic->brightness) {
 			/* We want 0 to 255 we get 0-65535 */
 			decoder->bright = pic->brightness;
 			saa7110_write(client, 0x19, decoder->bright >> 8);
 		}
 		if (decoder->contrast != pic->contrast) {
 			/* We want 0 to 127 we get 0-65535 */
 			decoder->contrast = pic->contrast;
 			saa7110_write(client, 0x13,
 				      decoder->contrast >> 9);
 		}
 		if (decoder->sat != pic->colour) {
 			/* We want 0 to 127 we get 0-65535 */
 			decoder->sat = pic->colour;
 			saa7110_write(client, 0x12, decoder->sat >> 9);
 		}
 		if (decoder->hue != pic->hue) {
 			/* We want -128 to 127 we get 0-65535 */
 			decoder->hue = pic->hue;
 			saa7110_write(client, 0x07,
 				      (decoder->hue >> 8) - 128);
 		}
 		break;
 	}

 	case DECODER_DUMP:
 		if (!debug)
 			break;
 		for (v = 0; v < SAA7110_NR_REG; v += 16) {
 			int j;
 			v4l_dbg(1, debug, client, "%02x:", v);
 			for (j = 0; j < 16 && v + j < SAA7110_NR_REG; j++)
 				printk(KERN_CONT " %02x", decoder->reg[v + j]);
 			printk(KERN_CONT "\n");
 		}
 		break;

 	default:
 		v4l_dbg(1, debug, client, "unknown command %08x\n", cmd);
 		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[] = { 0x9c >> 1, 0x9e >> 1, I2C_CLIENT_END };

 I2C_CLIENT_INSMOD;

 static int saa7110_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
 	struct saa7110 *decoder;
 	int rv;

 	/* Check if the adapter supports the needed features */
 	if (!i2c_check_functionality(client->adapter,
 		I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 		return -ENODEV;

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

 	decoder = kzalloc(sizeof(struct saa7110), GFP_KERNEL);
 	if (!decoder)
 		return -ENOMEM;
 	decoder->norm = VIDEO_MODE_PAL;
 	decoder->input = 0;
 	decoder->enable = 1;
 	decoder->bright = 32768;
 	decoder->contrast = 32768;
 	decoder->hue = 32768;
 	decoder->sat = 32768;
 	init_waitqueue_head(&decoder->wq);
 	i2c_set_clientdata(client, decoder);

 	rv = saa7110_write_block(client, initseq, sizeof(initseq));
 	if (rv < 0) {
 		v4l_dbg(1, debug, client, "init status %d\n", rv);
 	} else {
 		int ver, status;
 		saa7110_write(client, 0x21, 0x10);
 		saa7110_write(client, 0x0e, 0x18);
 		saa7110_write(client, 0x0D, 0x04);
 		ver = saa7110_read(client);
 		saa7110_write(client, 0x0D, 0x06);
 		//mdelay(150);
 		status = saa7110_read(client);
 		v4l_dbg(1, debug, client, "version %x, status=0x%02x\n",
 			       ver, status);
 		saa7110_write(client, 0x0D, 0x86);
 		saa7110_write(client, 0x0F, 0x10);
 		saa7110_write(client, 0x11, 0x59);
 		//saa7110_write(client, 0x2E, 0x9A);
 	}

 	//saa7110_selmux(client,0);
 	//determine_norm(client);
 	/* setup and implicit mode 0 select has been performed */

 	return 0;
 }

 static int saa7110_remove(struct i2c_client *client)
 {
 	kfree(i2c_get_clientdata(client));
 	return 0;
 }

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

 static const struct i2c_device_id saa7110_id[] = {
 	{ "saa7110", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, saa7110_id);

 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 	.name = "saa7110",
 	.driverid = I2C_DRIVERID_SAA7110,
 	.command = saa7110_command,
 	.probe = saa7110_probe,
 	.remove = saa7110_remove,
 	.id_table = saa7110_id,
 };
	/*
	* saa7110 - Philips SAA7110(A) video decoder driver
	*
	* Copyright (C) 1998 Pauline Middelink <middelin@polyware.nl>
	*
	* 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/types.h>
	#include <linux/delay.h>
	#include <linux/slab.h>
	#include <linux/wait.h>
	#include <asm/uaccess.h>
	#include <linux/i2c.h>
	#include <linux/videodev.h>
	#include <linux/video_decoder.h>
	#include <media/v4l2-common.h>
	#include <media/v4l2-i2c-drv-legacy.h>

	MODULE_DESCRIPTION("Philips SAA7110 video decoder driver");
	MODULE_AUTHOR("Pauline Middelink");
	MODULE_LICENSE("GPL");

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

	#define SAA7110_MAX_INPUT 9 /* 6 CVBS, 3 SVHS */
	#define SAA7110_MAX_OUTPUT 1 /* 1 YUV */

	#define SAA7110_NR_REG 0x35

	struct saa7110 {
	u8 reg[SAA7110_NR_REG];

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

	wait_queue_head_t wq;
	};

	/* ----------------------------------------------------------------------- */
	/* I2C support functions */
	/* ----------------------------------------------------------------------- */

	static int saa7110_write(struct i2c_client *client, u8 reg, u8 value)
	{
	struct saa7110 *decoder = i2c_get_clientdata(client);

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

	static int saa7110_write_block(struct i2c_client client, const u8 data, unsigned int len)
	{
	int ret = -1;
	u8 reg = data; / first register to write to */

	/* Sanity check */
	if (reg + (len - 1) > SAA7110_NR_REG)
	return ret;

	/* the saa7110 has an autoincrement function, use it if
	* the adapter understands raw I2C */
	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
	struct saa7110 *decoder = i2c_get_clientdata(client);

	ret = i2c_master_send(client, data, len);

	/* Cache the written data */
	memcpy(decoder->reg + reg, data + 1, len - 1);
	} else {
	for (++data, --len; len; len--) {
	ret = saa7110_write(client, reg++, *data++);
	if (ret < 0)
	break;
	}
	}

	return ret;
	}

	static inline int saa7110_read(struct i2c_client *client)
	{
	return i2c_smbus_read_byte(client);
	}

	/* ----------------------------------------------------------------------- */
	/* SAA7110 functions */
	/* ----------------------------------------------------------------------- */

	#define FRESP_06H_COMPST 0x03 //0x13
	#define FRESP_06H_SVIDEO 0x83 //0xC0


	static int saa7110_selmux(struct i2c_client *client, int chan)
	{
	static const unsigned char modes[9][8] = {
	/* mode 0 */
	{FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
	0x44, 0x75, 0x16},
	/* mode 1 */
	{FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
	0x44, 0x75, 0x16},
	/* mode 2 */
	{FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
	0x60, 0xB5, 0x05},
	/* mode 3 */
	{FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
	0x60, 0xB5, 0x05},
	/* mode 4 */
	{FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
	0x60, 0xB5, 0x03},
	/* mode 5 */
	{FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
	0x60, 0xB5, 0x03},
	/* mode 6 */
	{FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
	0x44, 0x75, 0x12},
	/* mode 7 */
	{FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
	0x60, 0xB5, 0x14},
	/* mode 8 */
	{FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
	0x44, 0x75, 0x21}
	};
	struct saa7110 *decoder = i2c_get_clientdata(client);
	const unsigned char *ptr = modes[chan];

	saa7110_write(client, 0x06, ptr[0]); /* Luminance control */
	saa7110_write(client, 0x20, ptr[1]); /* Analog Control #1 */
	saa7110_write(client, 0x21, ptr[2]); /* Analog Control #2 */
	saa7110_write(client, 0x22, ptr[3]); /* Mixer Control #1 */
	saa7110_write(client, 0x2C, ptr[4]); /* Mixer Control #2 */
	saa7110_write(client, 0x30, ptr[5]); /* ADCs gain control */
	saa7110_write(client, 0x31, ptr[6]); /* Mixer Control #3 */
	saa7110_write(client, 0x21, ptr[7]); /* Analog Control #2 */
	decoder->input = chan;

	return 0;
	}

	static const unsigned char initseq[1 + SAA7110_NR_REG] = {
	0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
	/* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
	/* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
	/* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	/* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
	/* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
	/* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
	};

	static int determine_norm(struct i2c_client *client)
	{
	DEFINE_WAIT(wait);
	struct saa7110 *decoder = i2c_get_clientdata(client);
	int status;

	/* mode changed, start automatic detection */
	saa7110_write_block(client, initseq, sizeof(initseq));
	saa7110_selmux(client, decoder->input);
	prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
	schedule_timeout(msecs_to_jiffies(250));
	finish_wait(&decoder->wq, &wait);
	status = saa7110_read(client);
	if (status & 0x40) {
	v4l_dbg(1, debug, client, "status=0x%02x (no signal)\n", status);
	return decoder->norm; // no change
	}
	if ((status & 3) == 0) {
	saa7110_write(client, 0x06, 0x83);
	if (status & 0x20) {
	v4l_dbg(1, debug, client, "status=0x%02x (NTSC/no color)\n", status);
	//saa7110_write(client,0x2E,0x81);
	return VIDEO_MODE_NTSC;
	}
	v4l_dbg(1, debug, client, "status=0x%02x (PAL/no color)\n", status);
	//saa7110_write(client,0x2E,0x9A);
	return VIDEO_MODE_PAL;
	}
	//saa7110_write(client,0x06,0x03);
	if (status & 0x20) { /* 60Hz */
	v4l_dbg(1, debug, client, "status=0x%02x (NTSC)\n", status);
	saa7110_write(client, 0x0D, 0x86);
	saa7110_write(client, 0x0F, 0x50);
	saa7110_write(client, 0x11, 0x2C);
	//saa7110_write(client,0x2E,0x81);
	return VIDEO_MODE_NTSC;
	}

	/* 50Hz -> PAL/SECAM */
	saa7110_write(client, 0x0D, 0x86);
	saa7110_write(client, 0x0F, 0x10);
	saa7110_write(client, 0x11, 0x59);
	//saa7110_write(client,0x2E,0x9A);

	prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
	schedule_timeout(msecs_to_jiffies(250));
	finish_wait(&decoder->wq, &wait);

	status = saa7110_read(client);
	if ((status & 0x03) == 0x01) {
	v4l_dbg(1, debug, client, "status=0x%02x (SECAM)\n", status);
	saa7110_write(client, 0x0D, 0x87);
	return VIDEO_MODE_SECAM;
	}
	v4l_dbg(1, debug, client, "status=0x%02x (PAL)\n", status);
	return VIDEO_MODE_PAL;
	}

	static int
	saa7110_command (struct i2c_client *client,
	unsigned int cmd,
	void *arg)
	{
	struct saa7110 *decoder = i2c_get_clientdata(client);
	int v;

	switch (cmd) {
	case 0:
	//saa7110_write_block(client, initseq, sizeof(initseq));
	break;

	case DECODER_GET_CAPABILITIES:
	{
	struct video_decoder_capability *dc = arg;

	dc->flags =
	VIDEO_DECODER_PAL \| VIDEO_DECODER_NTSC \|
	VIDEO_DECODER_SECAM \| VIDEO_DECODER_AUTO;
	dc->inputs = SAA7110_MAX_INPUT;
	dc->outputs = SAA7110_MAX_OUTPUT;
	break;
	}

	case DECODER_GET_STATUS:
	{
	int status;
	int res = 0;

	status = saa7110_read(client);
	v4l_dbg(1, debug, client, "status=0x%02x norm=%d\n",
	status, decoder->norm);
	if (!(status & 0x40))
	res \|= DECODER_STATUS_GOOD;
	if (status & 0x03)
	res \|= DECODER_STATUS_COLOR;

	switch (decoder->norm) {
	case VIDEO_MODE_NTSC:
	res \|= DECODER_STATUS_NTSC;
	break;
	case VIDEO_MODE_PAL:
	res \|= DECODER_STATUS_PAL;
	break;
	case VIDEO_MODE_SECAM:
	res \|= DECODER_STATUS_SECAM;
	break;
	}
	(int ) arg = res;
	break;
	}

	case DECODER_SET_NORM:
	v = (int ) arg;
	if (decoder->norm != v) {
	decoder->norm = v;
	//saa7110_write(client, 0x06, 0x03);
	switch (v) {
	case VIDEO_MODE_NTSC:
	saa7110_write(client, 0x0D, 0x86);
	saa7110_write(client, 0x0F, 0x50);
	saa7110_write(client, 0x11, 0x2C);
	//saa7110_write(client, 0x2E, 0x81);
	v4l_dbg(1, debug, client, "switched to NTSC\n");
	break;
	case VIDEO_MODE_PAL:
	saa7110_write(client, 0x0D, 0x86);
	saa7110_write(client, 0x0F, 0x10);
	saa7110_write(client, 0x11, 0x59);
	//saa7110_write(client, 0x2E, 0x9A);
	v4l_dbg(1, debug, client, "switched to PAL\n");
	break;
	case VIDEO_MODE_SECAM:
	saa7110_write(client, 0x0D, 0x87);
	saa7110_write(client, 0x0F, 0x10);
	saa7110_write(client, 0x11, 0x59);
	//saa7110_write(client, 0x2E, 0x9A);
	v4l_dbg(1, debug, client, "switched to SECAM\n");
	break;
	case VIDEO_MODE_AUTO:
	v4l_dbg(1, debug, client, "switched to AUTO\n");
	decoder->norm = determine_norm(client);
	(int ) arg = decoder->norm;
	break;
	default:
	return -EPERM;
	}
	}
	break;

	case DECODER_SET_INPUT:
	v = (int ) arg;
	if (v < 0 \|\| v >= SAA7110_MAX_INPUT) {
	v4l_dbg(1, debug, client, "input=%d not available\n", v);
	return -EINVAL;
	}
	if (decoder->input != v) {
	saa7110_selmux(client, v);
	v4l_dbg(1, debug, client, "switched to input=%d\n", v);
	}
	break;

	case DECODER_SET_OUTPUT:
	v = (int ) arg;
	/* not much choice of outputs */
	if (v != 0)
	return -EINVAL;
	break;

	case DECODER_ENABLE_OUTPUT:
	v = (int ) arg;
	if (decoder->enable != v) {
	decoder->enable = v;
	saa7110_write(client, 0x0E, v ? 0x18 : 0x80);
	v4l_dbg(1, debug, client, "YUV %s\n", v ? "on" : "off");
	}
	break;

	case DECODER_SET_PICTURE:
	{
	struct video_picture *pic = arg;

	if (decoder->bright != pic->brightness) {
	/* We want 0 to 255 we get 0-65535 */
	decoder->bright = pic->brightness;
	saa7110_write(client, 0x19, decoder->bright >> 8);
	}
	if (decoder->contrast != pic->contrast) {
	/* We want 0 to 127 we get 0-65535 */
	decoder->contrast = pic->contrast;
	saa7110_write(client, 0x13,
	decoder->contrast >> 9);
	}
	if (decoder->sat != pic->colour) {
	/* We want 0 to 127 we get 0-65535 */
	decoder->sat = pic->colour;
	saa7110_write(client, 0x12, decoder->sat >> 9);
	}
	if (decoder->hue != pic->hue) {
	/* We want -128 to 127 we get 0-65535 */
	decoder->hue = pic->hue;
	saa7110_write(client, 0x07,
	(decoder->hue >> 8) - 128);
	}
	break;
	}

	case DECODER_DUMP:
	if (!debug)
	break;
	for (v = 0; v < SAA7110_NR_REG; v += 16) {
	int j;
	v4l_dbg(1, debug, client, "%02x:", v);
	for (j = 0; j < 16 && v + j < SAA7110_NR_REG; j++)
	printk(KERN_CONT " %02x", decoder->reg[v + j]);
	printk(KERN_CONT "\n");
	}
	break;

	default:
	v4l_dbg(1, debug, client, "unknown command %08x\n", cmd);
	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[] = { 0x9c >> 1, 0x9e >> 1, I2C_CLIENT_END };

	I2C_CLIENT_INSMOD;

	static int saa7110_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	struct saa7110 *decoder;
	int rv;

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(client->adapter,
	I2C_FUNC_SMBUS_READ_BYTE \| I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
	return -ENODEV;

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

	decoder = kzalloc(sizeof(struct saa7110), GFP_KERNEL);
	if (!decoder)
	return -ENOMEM;
	decoder->norm = VIDEO_MODE_PAL;
	decoder->input = 0;
	decoder->enable = 1;
	decoder->bright = 32768;
	decoder->contrast = 32768;
	decoder->hue = 32768;
	decoder->sat = 32768;
	init_waitqueue_head(&decoder->wq);
	i2c_set_clientdata(client, decoder);

	rv = saa7110_write_block(client, initseq, sizeof(initseq));
	if (rv < 0) {
	v4l_dbg(1, debug, client, "init status %d\n", rv);
	} else {
	int ver, status;
	saa7110_write(client, 0x21, 0x10);
	saa7110_write(client, 0x0e, 0x18);
	saa7110_write(client, 0x0D, 0x04);
	ver = saa7110_read(client);
	saa7110_write(client, 0x0D, 0x06);
	//mdelay(150);
	status = saa7110_read(client);
	v4l_dbg(1, debug, client, "version %x, status=0x%02x\n",
	ver, status);
	saa7110_write(client, 0x0D, 0x86);
	saa7110_write(client, 0x0F, 0x10);
	saa7110_write(client, 0x11, 0x59);
	//saa7110_write(client, 0x2E, 0x9A);
	}

	//saa7110_selmux(client,0);
	//determine_norm(client);
	/* setup and implicit mode 0 select has been performed */

	return 0;
	}

	static int saa7110_remove(struct i2c_client *client)
	{
	kfree(i2c_get_clientdata(client));
	return 0;
	}

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

	static const struct i2c_device_id saa7110_id[] = {
	{ "saa7110", 0 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, saa7110_id);

	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "saa7110",
	.driverid = I2C_DRIVERID_SAA7110,
	.command = saa7110_command,
	.probe = saa7110_probe,
	.remove = saa7110_remove,
	.id_table = saa7110_id,
	};