[deliverable/linux.git] / drivers / media / video / bt819.c

/*
 *  bt819 - BT819A VideoStream Decoder (Rockwell Part)
 *
 * Copyright (C) 1999 Mike Bernson <mike@mlb.org>
 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
 *
 * Modifications for LML33/DC10plus unified driver
 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
 *
 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
 *    - moved over to linux>=2.4.x i2c protocol (9/9/2002)
 *
 * This code was modify/ported from the saa7111 driver written
 * by Dave Perks.
 *
 * 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/ioctl.h>
#include <linux/delay.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("Brooktree-819 video decoder driver");
MODULE_AUTHOR("Mike Bernson & Dave Perks");
MODULE_LICENSE("GPL");

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


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

struct bt819 {
	struct v4l2_subdev sd;
	unsigned char reg[32];

	v4l2_std_id norm;
	int ident;
	int input;
	int enable;
	int bright;
	int contrast;
	int hue;
	int sat;
};

static inline struct bt819 *to_bt819(struct v4l2_subdev *sd)
{
	return container_of(sd, struct bt819, sd);
}

struct timing {
	int hactive;
	int hdelay;
	int vactive;
	int vdelay;
	int hscale;
	int vscale;
};

/* for values, see the bt819 datasheet */
static struct timing timing_data[] = {
	{864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000},
	{858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000},
};

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

static inline int bt819_write(struct bt819 *decoder, u8 reg, u8 value)
{
	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);

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

static inline int bt819_setbit(struct bt819 *decoder, u8 reg, u8 bit, u8 value)
{
	return bt819_write(decoder, reg,
		(decoder->reg[reg] & ~(1 << bit)) | (value ? (1 << bit) : 0));
}

static int bt819_write_block(struct bt819 *decoder, const u8 *data, unsigned int len)
{
	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
	int ret = -1;
	u8 reg;

	/* the bt819 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++] =
				    decoder->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 = bt819_write(decoder, reg, *data++);
			if (ret < 0)
				break;
			len -= 2;
		}
	}

	return ret;
}

static inline int bt819_read(struct bt819 *decoder, u8 reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);

	return i2c_smbus_read_byte_data(client, reg);
}

static int bt819_init(struct v4l2_subdev *sd)
{
	static unsigned char init[] = {
		/*0x1f, 0x00,*/     /* Reset */
		0x01, 0x59,	/* 0x01 input format */
		0x02, 0x00,	/* 0x02 temporal decimation */
		0x03, 0x12,	/* 0x03 Cropping msb */
		0x04, 0x16,	/* 0x04 Vertical Delay, lsb */
		0x05, 0xe0,	/* 0x05 Vertical Active lsb */
		0x06, 0x80,	/* 0x06 Horizontal Delay lsb */
		0x07, 0xd0,	/* 0x07 Horizontal Active lsb */
		0x08, 0x00,	/* 0x08 Horizontal Scaling msb */
		0x09, 0xf8,	/* 0x09 Horizontal Scaling lsb */
		0x0a, 0x00,	/* 0x0a Brightness control */
		0x0b, 0x30,	/* 0x0b Miscellaneous control */
		0x0c, 0xd8,	/* 0x0c Luma Gain lsb */
		0x0d, 0xfe,	/* 0x0d Chroma Gain (U) lsb */
		0x0e, 0xb4,	/* 0x0e Chroma Gain (V) msb */
		0x0f, 0x00,	/* 0x0f Hue control */
		0x12, 0x04,	/* 0x12 Output Format */
		0x13, 0x20,	/* 0x13 Vertial Scaling msb 0x00
					   chroma comb OFF, line drop scaling, interlace scaling
					   BUG? Why does turning the chroma comb on fuck up color?
					   Bug in the bt819 stepping on my board?
					*/
		0x14, 0x00,	/* 0x14 Vertial Scaling lsb */
		0x16, 0x07,	/* 0x16 Video Timing Polarity
					   ACTIVE=active low
					   FIELD: high=odd,
					   vreset=active high,
					   hreset=active high */
		0x18, 0x68,	/* 0x18 AGC Delay */
		0x19, 0x5d,	/* 0x19 Burst Gate Delay */
		0x1a, 0x80,	/* 0x1a ADC Interface */
	};

	struct bt819 *decoder = to_bt819(sd);
	struct timing *timing = &timing_data[(decoder->norm & V4L2_STD_525_60) ? 1 : 0];

	init[0x03 * 2 - 1] =
	    (((timing->vdelay >> 8) & 0x03) << 6) |
	    (((timing->vactive >> 8) & 0x03) << 4) |
	    (((timing->hdelay >> 8) & 0x03) << 2) |
	    ((timing->hactive >> 8) & 0x03);
	init[0x04 * 2 - 1] = timing->vdelay & 0xff;
	init[0x05 * 2 - 1] = timing->vactive & 0xff;
	init[0x06 * 2 - 1] = timing->hdelay & 0xff;
	init[0x07 * 2 - 1] = timing->hactive & 0xff;
	init[0x08 * 2 - 1] = timing->hscale >> 8;
	init[0x09 * 2 - 1] = timing->hscale & 0xff;
	/* 0x15 in array is address 0x19 */
	init[0x15 * 2 - 1] = (decoder->norm & V4L2_STD_625_50) ? 115 : 93;	/* Chroma burst delay */
	/* reset */
	bt819_write(decoder, 0x1f, 0x00);
	mdelay(1);

	/* init */
	return bt819_write_block(decoder, init, sizeof(init));
}

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

static int bt819_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
{
	struct bt819 *decoder = to_bt819(sd);
	int status = bt819_read(decoder, 0x00);
	int res = V4L2_IN_ST_NO_SIGNAL;
	v4l2_std_id std;

	if ((status & 0x80))
		res = 0;

	if ((status & 0x10))
		std = V4L2_STD_PAL;
	else
		std = V4L2_STD_NTSC;
	if (pstd)
		*pstd = std;
	if (pstatus)
		*pstatus = status;

	v4l2_dbg(1, debug, sd, "get status %x\n", status);
	return 0;
}

static int bt819_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
{
	return bt819_status(sd, NULL, std);
}

static int bt819_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
	return bt819_status(sd, status, NULL);
}

static int bt819_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
	struct bt819 *decoder = to_bt819(sd);
	struct timing *timing = NULL;

	v4l2_dbg(1, debug, sd, "set norm %llx\n", std);

	if (std & V4L2_STD_NTSC) {
		bt819_setbit(decoder, 0x01, 0, 1);
		bt819_setbit(decoder, 0x01, 1, 0);
		bt819_setbit(decoder, 0x01, 5, 0);
		bt819_write(decoder, 0x18, 0x68);
		bt819_write(decoder, 0x19, 0x5d);
		/* bt819_setbit(decoder, 0x1a,  5, 1); */
		timing = &timing_data[1];
	} else if (std & V4L2_STD_PAL) {
		bt819_setbit(decoder, 0x01, 0, 1);
		bt819_setbit(decoder, 0x01, 1, 1);
		bt819_setbit(decoder, 0x01, 5, 1);
		bt819_write(decoder, 0x18, 0x7f);
		bt819_write(decoder, 0x19, 0x72);
		/* bt819_setbit(decoder, 0x1a,  5, 0); */
		timing = &timing_data[0];
	} else {
		v4l2_dbg(1, debug, sd, "unsupported norm %llx\n", std);
		return -EINVAL;
	}
	bt819_write(decoder, 0x03,
			(((timing->vdelay >> 8) & 0x03) << 6) |
			(((timing->vactive >> 8) & 0x03) << 4) |
			(((timing->hdelay >> 8) & 0x03) << 2) |
			((timing->hactive >> 8) & 0x03));
	bt819_write(decoder, 0x04, timing->vdelay & 0xff);
	bt819_write(decoder, 0x05, timing->vactive & 0xff);
	bt819_write(decoder, 0x06, timing->hdelay & 0xff);
	bt819_write(decoder, 0x07, timing->hactive & 0xff);
	bt819_write(decoder, 0x08, (timing->hscale >> 8) & 0xff);
	bt819_write(decoder, 0x09, timing->hscale & 0xff);
	decoder->norm = std;
	return 0;
}

static int bt819_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
{
	struct bt819 *decoder = to_bt819(sd);

	v4l2_dbg(1, debug, sd, "set input %x\n", route->input);

	if (route->input < 0 || route->input > 7)
		return -EINVAL;

	if (decoder->input != route->input) {
		decoder->input = route->input;
		/* select mode */
		if (decoder->input == 0) {
			bt819_setbit(decoder, 0x0b, 6, 0);
			bt819_setbit(decoder, 0x1a, 1, 1);
		} else {
			bt819_setbit(decoder, 0x0b, 6, 1);
			bt819_setbit(decoder, 0x1a, 1, 0);
		}
	}
	return 0;
}

static int bt819_s_stream(struct v4l2_subdev *sd, int enable)
{
	struct bt819 *decoder = to_bt819(sd);

	v4l2_dbg(1, debug, sd, "enable output %x\n", enable);

	if (decoder->enable != enable) {
		decoder->enable = enable;
		bt819_setbit(decoder, 0x16, 7, !enable);
	}
	return 0;
}

static int bt819_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
	switch (qc->id) {
	case V4L2_CID_BRIGHTNESS:
		v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
		break;

	case V4L2_CID_CONTRAST:
		v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
		break;

	case V4L2_CID_SATURATION:
		v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
		break;

	case V4L2_CID_HUE:
		v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
		break;

	default:
		return -EINVAL;
	}
	return 0;
}

static int bt819_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	struct bt819 *decoder = to_bt819(sd);
	int temp;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
		if (decoder->bright == ctrl->value)
			break;
		decoder->bright = ctrl->value;
		bt819_write(decoder, 0x0a, decoder->bright);
		break;

	case V4L2_CID_CONTRAST:
		if (decoder->contrast == ctrl->value)
			break;
		decoder->contrast = ctrl->value;
		bt819_write(decoder, 0x0c, decoder->contrast & 0xff);
		bt819_setbit(decoder, 0x0b, 2, ((decoder->contrast >> 8) & 0x01));
		break;

	case V4L2_CID_SATURATION:
		if (decoder->sat == ctrl->value)
			break;
		decoder->sat = ctrl->value;
		bt819_write(decoder, 0x0d, (decoder->sat >> 7) & 0xff);
		bt819_setbit(decoder, 0x0b, 1, ((decoder->sat >> 15) & 0x01));

		/* Ratio between U gain and V gain must stay the same as
		   the ratio between the default U and V gain values. */
		temp = (decoder->sat * 180) / 254;
		bt819_write(decoder, 0x0e, (temp >> 7) & 0xff);
		bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01);
		break;

	case V4L2_CID_HUE:
		if (decoder->hue == ctrl->value)
			break;
		decoder->hue = ctrl->value;
		bt819_write(decoder, 0x0f, decoder->hue);
		break;

	default:
		return -EINVAL;
	}
	return 0;
}

static int bt819_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	struct bt819 *decoder = to_bt819(sd);

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
		ctrl->value = decoder->bright;
		break;
	case V4L2_CID_CONTRAST:
		ctrl->value = decoder->contrast;
		break;
	case V4L2_CID_SATURATION:
		ctrl->value = decoder->sat;
		break;
	case V4L2_CID_HUE:
		ctrl->value = decoder->hue;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static int bt819_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
{
	struct bt819 *decoder = to_bt819(sd);
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
}

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

static const struct v4l2_subdev_core_ops bt819_core_ops = {
	.g_chip_ident = bt819_g_chip_ident,
	.g_ctrl = bt819_g_ctrl,
	.s_ctrl = bt819_s_ctrl,
	.queryctrl = bt819_queryctrl,
};

static const struct v4l2_subdev_tuner_ops bt819_tuner_ops = {
	.s_std = bt819_s_std,
};

static const struct v4l2_subdev_video_ops bt819_video_ops = {
	.s_routing = bt819_s_routing,
	.s_stream = bt819_s_stream,
	.querystd = bt819_querystd,
	.g_input_status = bt819_g_input_status,
};

static const struct v4l2_subdev_ops bt819_ops = {
	.core = &bt819_core_ops,
	.tuner = &bt819_tuner_ops,
	.video = &bt819_video_ops,
};

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

static int bt819_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	int i, ver;
	struct bt819 *decoder;
	struct v4l2_subdev *sd;
	const char *name;

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

	decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
	if (decoder == NULL)
		return -ENOMEM;
	sd = &decoder->sd;
	v4l2_i2c_subdev_init(sd, client, &bt819_ops);

	ver = bt819_read(decoder, 0x17);
	switch (ver & 0xf0) {
	case 0x70:
		name = "bt819a";
		decoder->ident = V4L2_IDENT_BT819A;
		break;
	case 0x60:
		name = "bt817a";
		decoder->ident = V4L2_IDENT_BT817A;
		break;
	case 0x20:
		name = "bt815a";
		decoder->ident = V4L2_IDENT_BT815A;
		break;
	default:
		v4l2_dbg(1, debug, sd,
			"unknown chip version 0x%02x\n", ver);
		return -ENODEV;
	}

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

	decoder->norm = V4L2_STD_NTSC;
	decoder->input = 0;
	decoder->enable = 1;
	decoder->bright = 0;
	decoder->contrast = 0xd8;	/* 100% of original signal */
	decoder->hue = 0;
	decoder->sat = 0xfe;		/* 100% of original signal */

	i = bt819_init(sd);
	if (i < 0)
		v4l2_dbg(1, debug, sd, "init status %d\n", i);
	return 0;
}

static int bt819_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);

	v4l2_device_unregister_subdev(sd);
	kfree(to_bt819(sd));
	return 0;
}

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

static const struct i2c_device_id bt819_id[] = {
	{ "bt819a", 0 },
	{ "bt817a", 0 },
	{ "bt815a", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, bt819_id);

static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "bt819",
	.probe = bt819_probe,
	.remove = bt819_remove,
	.id_table = bt819_id,
};
Commit	Line	Data
	1	/*
	2	* bt819 - BT819A VideoStream Decoder (Rockwell Part)
	3	*
	4	* Copyright (C) 1999 Mike Bernson <mike@mlb.org>
	5	* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
	6	*
	7	* Modifications for LML33/DC10plus unified driver
	8	* Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
	9	*
	10	* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
	11	* - moved over to linux>=2.4.x i2c protocol (9/9/2002)
	12	*
	13	* This code was modify/ported from the saa7111 driver written
	14	* by Dave Perks.
	15	*
	16	* This program is free software; you can redistribute it and/or modify
	17	* it under the terms of the GNU General Public License as published by
	18	* the Free Software Foundation; either version 2 of the License, or
	19	* (at your option) any later version.
	20	*
	21	* This program is distributed in the hope that it will be useful,
	22	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	23	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	24	* GNU General Public License for more details.
	25	*
	26	* You should have received a copy of the GNU General Public License
	27	* along with this program; if not, write to the Free Software
	28	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	29	*/
	30
	31	#include <linux/module.h>
	32	#include <linux/types.h>
	33	#include <linux/ioctl.h>
	34	#include <linux/delay.h>
	35	#include <asm/uaccess.h>
	36	#include <linux/i2c.h>
	37	#include <linux/i2c-id.h>
	38	#include <linux/videodev2.h>
	39	#include <media/v4l2-device.h>
	40	#include <media/v4l2-chip-ident.h>
	41	#include <media/v4l2-i2c-drv.h>
	42
	43	MODULE_DESCRIPTION("Brooktree-819 video decoder driver");
	44	MODULE_AUTHOR("Mike Bernson & Dave Perks");
	45	MODULE_LICENSE("GPL");
	46
	47	static int debug;
	48	module_param(debug, int, 0);
	49	MODULE_PARM_DESC(debug, "Debug level (0-1)");
	50
	51
	52	/* ----------------------------------------------------------------------- */
	53
	54	struct bt819 {
	55	struct v4l2_subdev sd;
	56	unsigned char reg[32];
	57
	58	v4l2_std_id norm;
	59	int ident;
	60	int input;
	61	int enable;
	62	int bright;
	63	int contrast;
	64	int hue;
	65	int sat;
	66	};
	67
	68	static inline struct bt819 to_bt819(struct v4l2_subdev sd)
	69	{
	70	return container_of(sd, struct bt819, sd);
	71	}
	72
	73	struct timing {
	74	int hactive;
	75	int hdelay;
	76	int vactive;
	77	int vdelay;
	78	int hscale;
	79	int vscale;
	80	};
	81
	82	/* for values, see the bt819 datasheet */
	83	static struct timing timing_data[] = {
	84	{864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000},
	85	{858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000},
	86	};
	87
	88	/* ----------------------------------------------------------------------- */
	89
	90	static inline int bt819_write(struct bt819 *decoder, u8 reg, u8 value)
	91	{
	92	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
	93
	94	decoder->reg[reg] = value;
	95	return i2c_smbus_write_byte_data(client, reg, value);
	96	}
	97
	98	static inline int bt819_setbit(struct bt819 *decoder, u8 reg, u8 bit, u8 value)
	99	{
	100	return bt819_write(decoder, reg,
	101	(decoder->reg[reg] & ~(1 << bit)) \| (value ? (1 << bit) : 0));
	102	}
	103
	104	static int bt819_write_block(struct bt819 decoder, const u8 data, unsigned int len)
	105	{
	106	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
	107	int ret = -1;
	108	u8 reg;
	109
	110	/* the bt819 has an autoincrement function, use it if
	111	* the adapter understands raw I2C */
	112	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
	113	/* do raw I2C, not smbus compatible */
	114	u8 block_data[32];
	115	int block_len;
	116
	117	while (len >= 2) {
	118	block_len = 0;
	119	block_data[block_len++] = reg = data[0];
	120	do {
	121	block_data[block_len++] =
	122	decoder->reg[reg++] = data[1];
	123	len -= 2;
	124	data += 2;
	125	} while (len >= 2 && data[0] == reg && block_len < 32);
	126	ret = i2c_master_send(client, block_data, block_len);
	127	if (ret < 0)
	128	break;
	129	}
	130	} else {
	131	/* do some slow I2C emulation kind of thing */
	132	while (len >= 2) {
	133	reg = *data++;
	134	ret = bt819_write(decoder, reg, *data++);
	135	if (ret < 0)
	136	break;
	137	len -= 2;
	138	}
	139	}
	140
	141	return ret;
	142	}
	143
	144	static inline int bt819_read(struct bt819 *decoder, u8 reg)
	145	{
	146	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
	147
	148	return i2c_smbus_read_byte_data(client, reg);
	149	}
	150
	151	static int bt819_init(struct v4l2_subdev *sd)
	152	{
	153	static unsigned char init[] = {
	154	/0x1f, 0x00,/ /* Reset */
	155	0x01, 0x59, /* 0x01 input format */
	156	0x02, 0x00, /* 0x02 temporal decimation */
	157	0x03, 0x12, /* 0x03 Cropping msb */
	158	0x04, 0x16, /* 0x04 Vertical Delay, lsb */
	159	0x05, 0xe0, /* 0x05 Vertical Active lsb */
	160	0x06, 0x80, /* 0x06 Horizontal Delay lsb */
	161	0x07, 0xd0, /* 0x07 Horizontal Active lsb */
	162	0x08, 0x00, /* 0x08 Horizontal Scaling msb */
	163	0x09, 0xf8, /* 0x09 Horizontal Scaling lsb */
	164	0x0a, 0x00, /* 0x0a Brightness control */
	165	0x0b, 0x30, /* 0x0b Miscellaneous control */
	166	0x0c, 0xd8, /* 0x0c Luma Gain lsb */
	167	0x0d, 0xfe, /* 0x0d Chroma Gain (U) lsb */
	168	0x0e, 0xb4, /* 0x0e Chroma Gain (V) msb */
	169	0x0f, 0x00, /* 0x0f Hue control */
	170	0x12, 0x04, /* 0x12 Output Format */
	171	0x13, 0x20, /* 0x13 Vertial Scaling msb 0x00
	172	chroma comb OFF, line drop scaling, interlace scaling
	173	BUG? Why does turning the chroma comb on fuck up color?
	174	Bug in the bt819 stepping on my board?
	175	*/
	176	0x14, 0x00, /* 0x14 Vertial Scaling lsb */
	177	0x16, 0x07, /* 0x16 Video Timing Polarity
	178	ACTIVE=active low
	179	FIELD: high=odd,
	180	vreset=active high,
	181	hreset=active high */
	182	0x18, 0x68, /* 0x18 AGC Delay */
	183	0x19, 0x5d, /* 0x19 Burst Gate Delay */
	184	0x1a, 0x80, /* 0x1a ADC Interface */
	185	};
	186
	187	struct bt819 *decoder = to_bt819(sd);
	188	struct timing *timing = &timing_data[(decoder->norm & V4L2_STD_525_60) ? 1 : 0];
	189
	190	init[0x03 * 2 - 1] =
	191	(((timing->vdelay >> 8) & 0x03) << 6) \|
	192	(((timing->vactive >> 8) & 0x03) << 4) \|
	193	(((timing->hdelay >> 8) & 0x03) << 2) \|
	194	((timing->hactive >> 8) & 0x03);
	195	init[0x04 * 2 - 1] = timing->vdelay & 0xff;
	196	init[0x05 * 2 - 1] = timing->vactive & 0xff;
	197	init[0x06 * 2 - 1] = timing->hdelay & 0xff;
	198	init[0x07 * 2 - 1] = timing->hactive & 0xff;
	199	init[0x08 * 2 - 1] = timing->hscale >> 8;
	200	init[0x09 * 2 - 1] = timing->hscale & 0xff;
	201	/* 0x15 in array is address 0x19 */
	202	init[0x15 * 2 - 1] = (decoder->norm & V4L2_STD_625_50) ? 115 : 93; /* Chroma burst delay */
	203	/* reset */
	204	bt819_write(decoder, 0x1f, 0x00);
	205	mdelay(1);
	206
	207	/* init */
	208	return bt819_write_block(decoder, init, sizeof(init));
	209	}
	210
	211	/* ----------------------------------------------------------------------- */
	212
	213	static int bt819_status(struct v4l2_subdev sd, u32 pstatus, v4l2_std_id *pstd)
	214	{
	215	struct bt819 *decoder = to_bt819(sd);
	216	int status = bt819_read(decoder, 0x00);
	217	int res = V4L2_IN_ST_NO_SIGNAL;
	218	v4l2_std_id std;
	219
	220	if ((status & 0x80))
	221	res = 0;
	222
	223	if ((status & 0x10))
	224	std = V4L2_STD_PAL;
	225	else
	226	std = V4L2_STD_NTSC;
	227	if (pstd)
	228	*pstd = std;
	229	if (pstatus)
	230	*pstatus = status;
	231
	232	v4l2_dbg(1, debug, sd, "get status %x\n", status);
	233	return 0;
	234	}
	235
	236	static int bt819_querystd(struct v4l2_subdev sd, v4l2_std_id std)
	237	{
	238	return bt819_status(sd, NULL, std);
	239	}
	240
	241	static int bt819_g_input_status(struct v4l2_subdev sd, u32 status)
	242	{
	243	return bt819_status(sd, status, NULL);
	244	}
	245
	246	static int bt819_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
	247	{
	248	struct bt819 *decoder = to_bt819(sd);
	249	struct timing *timing = NULL;
	250
	251	v4l2_dbg(1, debug, sd, "set norm %llx\n", std);
	252
	253	if (std & V4L2_STD_NTSC) {
	254	bt819_setbit(decoder, 0x01, 0, 1);
	255	bt819_setbit(decoder, 0x01, 1, 0);
	256	bt819_setbit(decoder, 0x01, 5, 0);
	257	bt819_write(decoder, 0x18, 0x68);
	258	bt819_write(decoder, 0x19, 0x5d);
	259	/* bt819_setbit(decoder, 0x1a, 5, 1); */
	260	timing = &timing_data[1];
	261	} else if (std & V4L2_STD_PAL) {
	262	bt819_setbit(decoder, 0x01, 0, 1);
	263	bt819_setbit(decoder, 0x01, 1, 1);
	264	bt819_setbit(decoder, 0x01, 5, 1);
	265	bt819_write(decoder, 0x18, 0x7f);
	266	bt819_write(decoder, 0x19, 0x72);
	267	/* bt819_setbit(decoder, 0x1a, 5, 0); */
	268	timing = &timing_data[0];
	269	} else {
	270	v4l2_dbg(1, debug, sd, "unsupported norm %llx\n", std);
	271	return -EINVAL;
	272	}
	273	bt819_write(decoder, 0x03,
	274	(((timing->vdelay >> 8) & 0x03) << 6) \|
	275	(((timing->vactive >> 8) & 0x03) << 4) \|
	276	(((timing->hdelay >> 8) & 0x03) << 2) \|
	277	((timing->hactive >> 8) & 0x03));
	278	bt819_write(decoder, 0x04, timing->vdelay & 0xff);
	279	bt819_write(decoder, 0x05, timing->vactive & 0xff);
	280	bt819_write(decoder, 0x06, timing->hdelay & 0xff);
	281	bt819_write(decoder, 0x07, timing->hactive & 0xff);
	282	bt819_write(decoder, 0x08, (timing->hscale >> 8) & 0xff);
	283	bt819_write(decoder, 0x09, timing->hscale & 0xff);
	284	decoder->norm = std;
	285	return 0;
	286	}
	287
	288	static int bt819_s_routing(struct v4l2_subdev sd, const struct v4l2_routing route)
	289	{
	290	struct bt819 *decoder = to_bt819(sd);
	291
	292	v4l2_dbg(1, debug, sd, "set input %x\n", route->input);
	293
	294	if (route->input < 0 \|\| route->input > 7)
	295	return -EINVAL;
	296
	297	if (decoder->input != route->input) {
	298	decoder->input = route->input;
	299	/* select mode */
	300	if (decoder->input == 0) {
	301	bt819_setbit(decoder, 0x0b, 6, 0);
	302	bt819_setbit(decoder, 0x1a, 1, 1);
	303	} else {
	304	bt819_setbit(decoder, 0x0b, 6, 1);
	305	bt819_setbit(decoder, 0x1a, 1, 0);
	306	}
	307	}
	308	return 0;
	309	}
	310
	311	static int bt819_s_stream(struct v4l2_subdev *sd, int enable)
	312	{
	313	struct bt819 *decoder = to_bt819(sd);
	314
	315	v4l2_dbg(1, debug, sd, "enable output %x\n", enable);
	316
	317	if (decoder->enable != enable) {
	318	decoder->enable = enable;
	319	bt819_setbit(decoder, 0x16, 7, !enable);
	320	}
	321	return 0;
	322	}
	323
	324	static int bt819_queryctrl(struct v4l2_subdev sd, struct v4l2_queryctrl qc)
	325	{
	326	switch (qc->id) {
	327	case V4L2_CID_BRIGHTNESS:
	328	v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
	329	break;
	330
	331	case V4L2_CID_CONTRAST:
	332	v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
	333	break;
	334
	335	case V4L2_CID_SATURATION:
	336	v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
	337	break;
	338
	339	case V4L2_CID_HUE:
	340	v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
	341	break;
	342
	343	default:
	344	return -EINVAL;
	345	}
	346	return 0;
	347	}
	348
	349	static int bt819_s_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
	350	{
	351	struct bt819 *decoder = to_bt819(sd);
	352	int temp;
	353
	354	switch (ctrl->id) {
	355	case V4L2_CID_BRIGHTNESS:
	356	if (decoder->bright == ctrl->value)
	357	break;
	358	decoder->bright = ctrl->value;
	359	bt819_write(decoder, 0x0a, decoder->bright);
	360	break;
	361
	362	case V4L2_CID_CONTRAST:
	363	if (decoder->contrast == ctrl->value)
	364	break;
	365	decoder->contrast = ctrl->value;
	366	bt819_write(decoder, 0x0c, decoder->contrast & 0xff);
	367	bt819_setbit(decoder, 0x0b, 2, ((decoder->contrast >> 8) & 0x01));
	368	break;
	369
	370	case V4L2_CID_SATURATION:
	371	if (decoder->sat == ctrl->value)
	372	break;
	373	decoder->sat = ctrl->value;
	374	bt819_write(decoder, 0x0d, (decoder->sat >> 7) & 0xff);
	375	bt819_setbit(decoder, 0x0b, 1, ((decoder->sat >> 15) & 0x01));
	376
	377	/* Ratio between U gain and V gain must stay the same as
	378	the ratio between the default U and V gain values. */
	379	temp = (decoder->sat * 180) / 254;
	380	bt819_write(decoder, 0x0e, (temp >> 7) & 0xff);
	381	bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01);
	382	break;
	383
	384	case V4L2_CID_HUE:
	385	if (decoder->hue == ctrl->value)
	386	break;
	387	decoder->hue = ctrl->value;
	388	bt819_write(decoder, 0x0f, decoder->hue);
	389	break;
	390
	391	default:
	392	return -EINVAL;
	393	}
	394	return 0;
	395	}
	396
	397	static int bt819_g_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
	398	{
	399	struct bt819 *decoder = to_bt819(sd);
	400
	401	switch (ctrl->id) {
	402	case V4L2_CID_BRIGHTNESS:
	403	ctrl->value = decoder->bright;
	404	break;
	405	case V4L2_CID_CONTRAST:
	406	ctrl->value = decoder->contrast;
	407	break;
	408	case V4L2_CID_SATURATION:
	409	ctrl->value = decoder->sat;
	410	break;
	411	case V4L2_CID_HUE:
	412	ctrl->value = decoder->hue;
	413	break;
	414	default:
	415	return -EINVAL;
	416	}
	417	return 0;
	418	}
	419
	420	static int bt819_g_chip_ident(struct v4l2_subdev sd, struct v4l2_dbg_chip_ident chip)
	421	{
	422	struct bt819 *decoder = to_bt819(sd);
	423	struct i2c_client *client = v4l2_get_subdevdata(sd);
	424
	425	return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
	426	}
	427
	428	/* ----------------------------------------------------------------------- */
	429
	430	static const struct v4l2_subdev_core_ops bt819_core_ops = {
	431	.g_chip_ident = bt819_g_chip_ident,
	432	.g_ctrl = bt819_g_ctrl,
	433	.s_ctrl = bt819_s_ctrl,
	434	.queryctrl = bt819_queryctrl,
	435	};
	436
	437	static const struct v4l2_subdev_tuner_ops bt819_tuner_ops = {
	438	.s_std = bt819_s_std,
	439	};
	440
	441	static const struct v4l2_subdev_video_ops bt819_video_ops = {
	442	.s_routing = bt819_s_routing,
	443	.s_stream = bt819_s_stream,
	444	.querystd = bt819_querystd,
	445	.g_input_status = bt819_g_input_status,
	446	};
	447
	448	static const struct v4l2_subdev_ops bt819_ops = {
	449	.core = &bt819_core_ops,
	450	.tuner = &bt819_tuner_ops,
	451	.video = &bt819_video_ops,
	452	};
	453
	454	/* ----------------------------------------------------------------------- */
	455
	456	static int bt819_probe(struct i2c_client *client,
	457	const struct i2c_device_id *id)
	458	{
	459	int i, ver;
	460	struct bt819 *decoder;
	461	struct v4l2_subdev *sd;
	462	const char *name;
	463
	464	/* Check if the adapter supports the needed features */
	465	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	466	return -ENODEV;
	467
	468	decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
	469	if (decoder == NULL)
	470	return -ENOMEM;
	471	sd = &decoder->sd;
	472	v4l2_i2c_subdev_init(sd, client, &bt819_ops);
	473
	474	ver = bt819_read(decoder, 0x17);
	475	switch (ver & 0xf0) {
	476	case 0x70:
	477	name = "bt819a";
	478	decoder->ident = V4L2_IDENT_BT819A;
	479	break;
	480	case 0x60:
	481	name = "bt817a";
	482	decoder->ident = V4L2_IDENT_BT817A;
	483	break;
	484	case 0x20:
	485	name = "bt815a";
	486	decoder->ident = V4L2_IDENT_BT815A;
	487	break;
	488	default:
	489	v4l2_dbg(1, debug, sd,
	490	"unknown chip version 0x%02x\n", ver);
	491	return -ENODEV;
	492	}
	493
	494	v4l_info(client, "%s found @ 0x%x (%s)\n", name,
	495	client->addr << 1, client->adapter->name);
	496
	497	decoder->norm = V4L2_STD_NTSC;
	498	decoder->input = 0;
	499	decoder->enable = 1;
	500	decoder->bright = 0;
	501	decoder->contrast = 0xd8; /* 100% of original signal */
	502	decoder->hue = 0;
	503	decoder->sat = 0xfe; /* 100% of original signal */
	504
	505	i = bt819_init(sd);
	506	if (i < 0)
	507	v4l2_dbg(1, debug, sd, "init status %d\n", i);
	508	return 0;
	509	}
	510
	511	static int bt819_remove(struct i2c_client *client)
	512	{
	513	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	514
	515	v4l2_device_unregister_subdev(sd);
	516	kfree(to_bt819(sd));
	517	return 0;
	518	}
	519
	520	/* ----------------------------------------------------------------------- */
	521
	522	static const struct i2c_device_id bt819_id[] = {
	523	{ "bt819a", 0 },
	524	{ "bt817a", 0 },
	525	{ "bt815a", 0 },
	526	{ }
	527	};
	528	MODULE_DEVICE_TABLE(i2c, bt819_id);
	529
	530	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	531	.name = "bt819",
	532	.probe = bt819_probe,
	533	.remove = bt819_remove,
	534	.id_table = bt819_id,
	535	};