drivers/media/i2c/saa7110.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * 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)
  */

 #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 <linux/uaccess.h>
 #include <linux/i2c.h>
 #include <linux/videodev2.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-ctrls.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 {
 	struct v4l2_subdev sd;
 	struct v4l2_ctrl_handler hdl;
 	u8 reg[SAA7110_NR_REG];

 	v4l2_std_id norm;
 	int input;
 	int enable;

 	wait_queue_head_t wq;
 };

 static inline struct saa7110 *to_saa7110(struct v4l2_subdev *sd)
 {
 	return container_of(sd, struct saa7110, sd);
 }

 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
 {
 	return &container_of(ctrl->handler, struct saa7110, hdl)->sd;
 }

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

 static int saa7110_write(struct v4l2_subdev *sd, u8 reg, u8 value)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	struct saa7110 *decoder = to_saa7110(sd);

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

 static int saa7110_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	struct saa7110 *decoder = to_saa7110(sd);
 	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)) {
 		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(sd, reg++, *data++);
 			if (ret < 0)
 				break;
 		}
 	}

 	return ret;
 }

 static inline int saa7110_read(struct v4l2_subdev *sd)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);

 	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 v4l2_subdev *sd, 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 = to_saa7110(sd);
 	const unsigned char *ptr = modes[chan];

 	saa7110_write(sd, 0x06, ptr[0]);	/* Luminance control    */
 	saa7110_write(sd, 0x20, ptr[1]);	/* Analog Control #1    */
 	saa7110_write(sd, 0x21, ptr[2]);	/* Analog Control #2    */
 	saa7110_write(sd, 0x22, ptr[3]);	/* Mixer Control #1     */
 	saa7110_write(sd, 0x2C, ptr[4]);	/* Mixer Control #2     */
 	saa7110_write(sd, 0x30, ptr[5]);	/* ADCs gain control    */
 	saa7110_write(sd, 0x31, ptr[6]);	/* Mixer Control #3     */
 	saa7110_write(sd, 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 v4l2_std_id determine_norm(struct v4l2_subdev *sd)
 {
 	DEFINE_WAIT(wait);
 	struct saa7110 *decoder = to_saa7110(sd);
 	int status;

 	/* mode changed, start automatic detection */
 	saa7110_write_block(sd, initseq, sizeof(initseq));
 	saa7110_selmux(sd, decoder->input);
 	prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 	schedule_timeout(msecs_to_jiffies(250));
 	finish_wait(&decoder->wq, &wait);
 	status = saa7110_read(sd);
 	if (status & 0x40) {
 		v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
 		return V4L2_STD_UNKNOWN;
 	}
 	if ((status & 3) == 0) {
 		saa7110_write(sd, 0x06, 0x83);
 		if (status & 0x20) {
 			v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC/no color)\n", status);
 			/*saa7110_write(sd,0x2E,0x81);*/
 			return V4L2_STD_NTSC;
 		}
 		v4l2_dbg(1, debug, sd, "status=0x%02x (PAL/no color)\n", status);
 		/*saa7110_write(sd,0x2E,0x9A);*/
 		return V4L2_STD_PAL;
 	}
 	/*saa7110_write(sd,0x06,0x03);*/
 	if (status & 0x20) {	/* 60Hz */
 		v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC)\n", status);
 		saa7110_write(sd, 0x0D, 0x86);
 		saa7110_write(sd, 0x0F, 0x50);
 		saa7110_write(sd, 0x11, 0x2C);
 		/*saa7110_write(sd,0x2E,0x81);*/
 		return V4L2_STD_NTSC;
 	}

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

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

 	status = saa7110_read(sd);
 	if ((status & 0x03) == 0x01) {
 		v4l2_dbg(1, debug, sd, "status=0x%02x (SECAM)\n", status);
 		saa7110_write(sd, 0x0D, 0x87);
 		return V4L2_STD_SECAM;
 	}
 	v4l2_dbg(1, debug, sd, "status=0x%02x (PAL)\n", status);
 	return V4L2_STD_PAL;
 }

 static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
 {
 	struct saa7110 *decoder = to_saa7110(sd);
 	int res = V4L2_IN_ST_NO_SIGNAL;
 	int status = saa7110_read(sd);

 	v4l2_dbg(1, debug, sd, "status=0x%02x norm=%llx\n",
 		       status, (unsigned long long)decoder->norm);
 	if (!(status & 0x40))
 		res = 0;
 	if (!(status & 0x03))
 		res |= V4L2_IN_ST_NO_COLOR;

 	*pstatus = res;
 	return 0;
 }

 static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 {
 	*std &= determine_norm(sd);
 	return 0;
 }

 static int saa7110_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 {
 	struct saa7110 *decoder = to_saa7110(sd);

 	if (decoder->norm != std) {
 		decoder->norm = std;
 		/*saa7110_write(sd, 0x06, 0x03);*/
 		if (std & V4L2_STD_NTSC) {
 			saa7110_write(sd, 0x0D, 0x86);
 			saa7110_write(sd, 0x0F, 0x50);
 			saa7110_write(sd, 0x11, 0x2C);
 			/*saa7110_write(sd, 0x2E, 0x81);*/
 			v4l2_dbg(1, debug, sd, "switched to NTSC\n");
 		} else if (std & V4L2_STD_PAL) {
 			saa7110_write(sd, 0x0D, 0x86);
 			saa7110_write(sd, 0x0F, 0x10);
 			saa7110_write(sd, 0x11, 0x59);
 			/*saa7110_write(sd, 0x2E, 0x9A);*/
 			v4l2_dbg(1, debug, sd, "switched to PAL\n");
 		} else if (std & V4L2_STD_SECAM) {
 			saa7110_write(sd, 0x0D, 0x87);
 			saa7110_write(sd, 0x0F, 0x10);
 			saa7110_write(sd, 0x11, 0x59);
 			/*saa7110_write(sd, 0x2E, 0x9A);*/
 			v4l2_dbg(1, debug, sd, "switched to SECAM\n");
 		} else {
 			return -EINVAL;
 		}
 	}
 	return 0;
 }

 static int saa7110_s_routing(struct v4l2_subdev *sd,
 			     u32 input, u32 output, u32 config)
 {
 	struct saa7110 *decoder = to_saa7110(sd);

 	if (input >= SAA7110_MAX_INPUT) {
 		v4l2_dbg(1, debug, sd, "input=%d not available\n", input);
 		return -EINVAL;
 	}
 	if (decoder->input != input) {
 		saa7110_selmux(sd, input);
 		v4l2_dbg(1, debug, sd, "switched to input=%d\n", input);
 	}
 	return 0;
 }

 static int saa7110_s_stream(struct v4l2_subdev *sd, int enable)
 {
 	struct saa7110 *decoder = to_saa7110(sd);

 	if (decoder->enable != enable) {
 		decoder->enable = enable;
 		saa7110_write(sd, 0x0E, enable ? 0x18 : 0x80);
 		v4l2_dbg(1, debug, sd, "YUV %s\n", enable ? "on" : "off");
 	}
 	return 0;
 }

 static int saa7110_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct v4l2_subdev *sd = to_sd(ctrl);

 	switch (ctrl->id) {
 	case V4L2_CID_BRIGHTNESS:
 		saa7110_write(sd, 0x19, ctrl->val);
 		break;
 	case V4L2_CID_CONTRAST:
 		saa7110_write(sd, 0x13, ctrl->val);
 		break;
 	case V4L2_CID_SATURATION:
 		saa7110_write(sd, 0x12, ctrl->val);
 		break;
 	case V4L2_CID_HUE:
 		saa7110_write(sd, 0x07, ctrl->val);
 		break;
 	default:
 		return -EINVAL;
 	}
 	return 0;
 }

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

 static const struct v4l2_ctrl_ops saa7110_ctrl_ops = {
 	.s_ctrl = saa7110_s_ctrl,
 };

 static const struct v4l2_subdev_video_ops saa7110_video_ops = {
 	.s_std = saa7110_s_std,
 	.s_routing = saa7110_s_routing,
 	.s_stream = saa7110_s_stream,
 	.querystd = saa7110_querystd,
 	.g_input_status = saa7110_g_input_status,
 };

 static const struct v4l2_subdev_ops saa7110_ops = {
 	.video = &saa7110_video_ops,
 };

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

 static int saa7110_probe(struct i2c_client *client)
 {
 	struct saa7110 *decoder;
 	struct v4l2_subdev *sd;
 	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 = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);
 	if (!decoder)
 		return -ENOMEM;
 	sd = &decoder->sd;
 	v4l2_i2c_subdev_init(sd, client, &saa7110_ops);
 	decoder->norm = V4L2_STD_PAL;
 	decoder->input = 0;
 	decoder->enable = 1;
 	v4l2_ctrl_handler_init(&decoder->hdl, 2);
 	v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 		V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
 	v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 		V4L2_CID_CONTRAST, 0, 127, 1, 64);
 	v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 		V4L2_CID_SATURATION, 0, 127, 1, 64);
 	v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 		V4L2_CID_HUE, -128, 127, 1, 0);
 	sd->ctrl_handler = &decoder->hdl;
 	if (decoder->hdl.error) {
 		int err = decoder->hdl.error;

 		v4l2_ctrl_handler_free(&decoder->hdl);
 		return err;
 	}
 	v4l2_ctrl_handler_setup(&decoder->hdl);

 	init_waitqueue_head(&decoder->wq);

 	rv = saa7110_write_block(sd, initseq, sizeof(initseq));
 	if (rv < 0) {
 		v4l2_dbg(1, debug, sd, "init status %d\n", rv);
 	} else {
 		int ver, status;
 		saa7110_write(sd, 0x21, 0x10);
 		saa7110_write(sd, 0x0e, 0x18);
 		saa7110_write(sd, 0x0D, 0x04);
 		ver = saa7110_read(sd);
 		saa7110_write(sd, 0x0D, 0x06);
 		/*mdelay(150);*/
 		status = saa7110_read(sd);
 		v4l2_dbg(1, debug, sd, "version %x, status=0x%02x\n",
 			       ver, status);
 		saa7110_write(sd, 0x0D, 0x86);
 		saa7110_write(sd, 0x0F, 0x10);
 		saa7110_write(sd, 0x11, 0x59);
 		/*saa7110_write(sd, 0x2E, 0x9A);*/
 	}

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

 	return 0;
 }

 static void saa7110_remove(struct i2c_client *client)
 {
 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
 	struct saa7110 *decoder = to_saa7110(sd);

 	v4l2_device_unregister_subdev(sd);
 	v4l2_ctrl_handler_free(&decoder->hdl);
 }

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

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

 static struct i2c_driver saa7110_driver = {
 	.driver = {
 		.name	= "saa7110",
 	},
 	.probe_new	= saa7110_probe,
 	.remove		= saa7110_remove,
 	.id_table	= saa7110_id,
 };

 module_i2c_driver(saa7110_driver);
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* 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)
	*/

	#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 <linux/uaccess.h>
	#include <linux/i2c.h>
	#include <linux/videodev2.h>
	#include <media/v4l2-device.h>
	#include <media/v4l2-ctrls.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 {
	struct v4l2_subdev sd;
	struct v4l2_ctrl_handler hdl;
	u8 reg[SAA7110_NR_REG];

	v4l2_std_id norm;
	int input;
	int enable;

	wait_queue_head_t wq;
	};

	static inline struct saa7110 to_saa7110(struct v4l2_subdev sd)
	{
	return container_of(sd, struct saa7110, sd);
	}

	static inline struct v4l2_subdev to_sd(struct v4l2_ctrl ctrl)
	{
	return &container_of(ctrl->handler, struct saa7110, hdl)->sd;
	}

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

	static int saa7110_write(struct v4l2_subdev *sd, u8 reg, u8 value)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct saa7110 *decoder = to_saa7110(sd);

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

	static int saa7110_write_block(struct v4l2_subdev sd, const u8 data, unsigned int len)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct saa7110 *decoder = to_saa7110(sd);
	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)) {
	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(sd, reg++, *data++);
	if (ret < 0)
	break;
	}
	}

	return ret;
	}

	static inline int saa7110_read(struct v4l2_subdev *sd)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	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 v4l2_subdev *sd, 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 = to_saa7110(sd);
	const unsigned char *ptr = modes[chan];

	saa7110_write(sd, 0x06, ptr[0]); /* Luminance control */
	saa7110_write(sd, 0x20, ptr[1]); /* Analog Control #1 */
	saa7110_write(sd, 0x21, ptr[2]); /* Analog Control #2 */
	saa7110_write(sd, 0x22, ptr[3]); /* Mixer Control #1 */
	saa7110_write(sd, 0x2C, ptr[4]); /* Mixer Control #2 */
	saa7110_write(sd, 0x30, ptr[5]); /* ADCs gain control */
	saa7110_write(sd, 0x31, ptr[6]); /* Mixer Control #3 */
	saa7110_write(sd, 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 v4l2_std_id determine_norm(struct v4l2_subdev *sd)
	{
	DEFINE_WAIT(wait);
	struct saa7110 *decoder = to_saa7110(sd);
	int status;

	/* mode changed, start automatic detection */
	saa7110_write_block(sd, initseq, sizeof(initseq));
	saa7110_selmux(sd, decoder->input);
	prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
	schedule_timeout(msecs_to_jiffies(250));
	finish_wait(&decoder->wq, &wait);
	status = saa7110_read(sd);
	if (status & 0x40) {
	v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
	return V4L2_STD_UNKNOWN;
	}
	if ((status & 3) == 0) {
	saa7110_write(sd, 0x06, 0x83);
	if (status & 0x20) {
	v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC/no color)\n", status);
	/saa7110_write(sd,0x2E,0x81);/
	return V4L2_STD_NTSC;
	}
	v4l2_dbg(1, debug, sd, "status=0x%02x (PAL/no color)\n", status);
	/saa7110_write(sd,0x2E,0x9A);/
	return V4L2_STD_PAL;
	}
	/saa7110_write(sd,0x06,0x03);/
	if (status & 0x20) { /* 60Hz */
	v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC)\n", status);
	saa7110_write(sd, 0x0D, 0x86);
	saa7110_write(sd, 0x0F, 0x50);
	saa7110_write(sd, 0x11, 0x2C);
	/saa7110_write(sd,0x2E,0x81);/
	return V4L2_STD_NTSC;
	}

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

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

	status = saa7110_read(sd);
	if ((status & 0x03) == 0x01) {
	v4l2_dbg(1, debug, sd, "status=0x%02x (SECAM)\n", status);
	saa7110_write(sd, 0x0D, 0x87);
	return V4L2_STD_SECAM;
	}
	v4l2_dbg(1, debug, sd, "status=0x%02x (PAL)\n", status);
	return V4L2_STD_PAL;
	}

	static int saa7110_g_input_status(struct v4l2_subdev sd, u32 pstatus)
	{
	struct saa7110 *decoder = to_saa7110(sd);
	int res = V4L2_IN_ST_NO_SIGNAL;
	int status = saa7110_read(sd);

	v4l2_dbg(1, debug, sd, "status=0x%02x norm=%llx\n",
	status, (unsigned long long)decoder->norm);
	if (!(status & 0x40))
	res = 0;
	if (!(status & 0x03))
	res \|= V4L2_IN_ST_NO_COLOR;

	*pstatus = res;
	return 0;
	}

	static int saa7110_querystd(struct v4l2_subdev sd, v4l2_std_id std)
	{
	*std &= determine_norm(sd);
	return 0;
	}

	static int saa7110_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
	{
	struct saa7110 *decoder = to_saa7110(sd);

	if (decoder->norm != std) {
	decoder->norm = std;
	/saa7110_write(sd, 0x06, 0x03);/
	if (std & V4L2_STD_NTSC) {
	saa7110_write(sd, 0x0D, 0x86);
	saa7110_write(sd, 0x0F, 0x50);
	saa7110_write(sd, 0x11, 0x2C);
	/saa7110_write(sd, 0x2E, 0x81);/
	v4l2_dbg(1, debug, sd, "switched to NTSC\n");
	} else if (std & V4L2_STD_PAL) {
	saa7110_write(sd, 0x0D, 0x86);
	saa7110_write(sd, 0x0F, 0x10);
	saa7110_write(sd, 0x11, 0x59);
	/saa7110_write(sd, 0x2E, 0x9A);/
	v4l2_dbg(1, debug, sd, "switched to PAL\n");
	} else if (std & V4L2_STD_SECAM) {
	saa7110_write(sd, 0x0D, 0x87);
	saa7110_write(sd, 0x0F, 0x10);
	saa7110_write(sd, 0x11, 0x59);
	/saa7110_write(sd, 0x2E, 0x9A);/
	v4l2_dbg(1, debug, sd, "switched to SECAM\n");
	} else {
	return -EINVAL;
	}
	}
	return 0;
	}

	static int saa7110_s_routing(struct v4l2_subdev *sd,
	u32 input, u32 output, u32 config)
	{
	struct saa7110 *decoder = to_saa7110(sd);

	if (input >= SAA7110_MAX_INPUT) {
	v4l2_dbg(1, debug, sd, "input=%d not available\n", input);
	return -EINVAL;
	}
	if (decoder->input != input) {
	saa7110_selmux(sd, input);
	v4l2_dbg(1, debug, sd, "switched to input=%d\n", input);
	}
	return 0;
	}

	static int saa7110_s_stream(struct v4l2_subdev *sd, int enable)
	{
	struct saa7110 *decoder = to_saa7110(sd);

	if (decoder->enable != enable) {
	decoder->enable = enable;
	saa7110_write(sd, 0x0E, enable ? 0x18 : 0x80);
	v4l2_dbg(1, debug, sd, "YUV %s\n", enable ? "on" : "off");
	}
	return 0;
	}

	static int saa7110_s_ctrl(struct v4l2_ctrl *ctrl)
	{
	struct v4l2_subdev *sd = to_sd(ctrl);

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
	saa7110_write(sd, 0x19, ctrl->val);
	break;
	case V4L2_CID_CONTRAST:
	saa7110_write(sd, 0x13, ctrl->val);
	break;
	case V4L2_CID_SATURATION:
	saa7110_write(sd, 0x12, ctrl->val);
	break;
	case V4L2_CID_HUE:
	saa7110_write(sd, 0x07, ctrl->val);
	break;
	default:
	return -EINVAL;
	}
	return 0;
	}

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

	static const struct v4l2_ctrl_ops saa7110_ctrl_ops = {
	.s_ctrl = saa7110_s_ctrl,
	};

	static const struct v4l2_subdev_video_ops saa7110_video_ops = {
	.s_std = saa7110_s_std,
	.s_routing = saa7110_s_routing,
	.s_stream = saa7110_s_stream,
	.querystd = saa7110_querystd,
	.g_input_status = saa7110_g_input_status,
	};

	static const struct v4l2_subdev_ops saa7110_ops = {
	.video = &saa7110_video_ops,
	};

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

	static int saa7110_probe(struct i2c_client *client)
	{
	struct saa7110 *decoder;
	struct v4l2_subdev *sd;
	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 = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);
	if (!decoder)
	return -ENOMEM;
	sd = &decoder->sd;
	v4l2_i2c_subdev_init(sd, client, &saa7110_ops);
	decoder->norm = V4L2_STD_PAL;
	decoder->input = 0;
	decoder->enable = 1;
	v4l2_ctrl_handler_init(&decoder->hdl, 2);
	v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
	V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
	v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
	V4L2_CID_CONTRAST, 0, 127, 1, 64);
	v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
	V4L2_CID_SATURATION, 0, 127, 1, 64);
	v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
	V4L2_CID_HUE, -128, 127, 1, 0);
	sd->ctrl_handler = &decoder->hdl;
	if (decoder->hdl.error) {
	int err = decoder->hdl.error;

	v4l2_ctrl_handler_free(&decoder->hdl);
	return err;
	}
	v4l2_ctrl_handler_setup(&decoder->hdl);

	init_waitqueue_head(&decoder->wq);

	rv = saa7110_write_block(sd, initseq, sizeof(initseq));
	if (rv < 0) {
	v4l2_dbg(1, debug, sd, "init status %d\n", rv);
	} else {
	int ver, status;
	saa7110_write(sd, 0x21, 0x10);
	saa7110_write(sd, 0x0e, 0x18);
	saa7110_write(sd, 0x0D, 0x04);
	ver = saa7110_read(sd);
	saa7110_write(sd, 0x0D, 0x06);
	/mdelay(150);/
	status = saa7110_read(sd);
	v4l2_dbg(1, debug, sd, "version %x, status=0x%02x\n",
	ver, status);
	saa7110_write(sd, 0x0D, 0x86);
	saa7110_write(sd, 0x0F, 0x10);
	saa7110_write(sd, 0x11, 0x59);
	/saa7110_write(sd, 0x2E, 0x9A);/
	}

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

	return 0;
	}

	static void saa7110_remove(struct i2c_client *client)
	{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct saa7110 *decoder = to_saa7110(sd);

	v4l2_device_unregister_subdev(sd);
	v4l2_ctrl_handler_free(&decoder->hdl);
	}

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

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

	static struct i2c_driver saa7110_driver = {
	.driver = {
	.name = "saa7110",
	},
	.probe_new = saa7110_probe,
	.remove = saa7110_remove,
	.id_table = saa7110_id,
	};

	module_i2c_driver(saa7110_driver);