[linux-2.6-block.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 <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>
#include <media/bt819.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", (unsigned long long)std);

	if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL)
		v4l2_err(sd, "no notify found!\n");

	if (std & V4L2_STD_NTSC) {
		v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, 0);
		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) {
		v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, 0);
		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",
				(unsigned long long)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;
	v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, 0);
	return 0;
}

static int bt819_s_routing(struct v4l2_subdev *sd,
			   u32 input, u32 output, u32 config)
{
	struct bt819 *decoder = to_bt819(sd);

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

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

	if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL)
		v4l2_err(sd, "no notify found!\n");

	if (decoder->input != input) {
		v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, 0);
		decoder->input = 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);
		}
		v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, 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,
	.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,
	.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
d56410e0	1	/*
1da177e4 LT	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>
d56410e0	9	*
1da177e4 LT	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>
18f3fa1e	32	#include <linux/types.h>
7fd011fb	33	#include <linux/ioctl.h>
2883913c	34	#include <linux/delay.h>
7fd011fb HV	35	#include <linux/i2c.h>
7fd011fb HV	36	#include <linux/i2c-id.h>
c2179ad8 HV	37	#include <linux/videodev2.h>
	38	#include <media/v4l2-device.h>
	39	#include <media/v4l2-chip-ident.h>
2d26698e	40	#include <media/v4l2-i2c-drv.h>
1cd3c0fa	41	#include <media/bt819.h>
1da177e4 LT	42
	43	MODULE_DESCRIPTION("Brooktree-819 video decoder driver");
	44	MODULE_AUTHOR("Mike Bernson & Dave Perks");
	45	MODULE_LICENSE("GPL");
	46
ff699e6b	47	static int debug;
1da177e4 LT	48	module_param(debug, int, 0);
	49	MODULE_PARM_DESC(debug, "Debug level (0-1)");
	50
c2179ad8	51
1da177e4 LT	52	/* ----------------------------------------------------------------------- */
	53
	54	struct bt819 {
c2179ad8	55	struct v4l2_subdev sd;
1da177e4 LT	56	unsigned char reg[32];
1da177e4 LT	57
107063c6	58	v4l2_std_id norm;
c2179ad8	59	int ident;
1da177e4 LT	60	int input;
	61	int enable;
	62	int bright;
	63	int contrast;
	64	int hue;
	65	int sat;
	66	};
	67
c2179ad8 HV	68	static inline struct bt819 to_bt819(struct v4l2_subdev sd)
	69	{
	70	return container_of(sd, struct bt819, sd);
	71	}
	72
1da177e4 LT	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
1da177e4 LT	88	/* ----------------------------------------------------------------------- */
1da177e4 LT	89
c2179ad8	90	static inline int bt819_write(struct bt819 *decoder, u8 reg, u8 value)
1da177e4	91	{
c2179ad8	92	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
1da177e4 LT	93
	94	decoder->reg[reg] = value;
	95	return i2c_smbus_write_byte_data(client, reg, value);
	96	}
	97
c2179ad8	98	static inline int bt819_setbit(struct bt819 *decoder, u8 reg, u8 bit, u8 value)
1da177e4	99	{
c2179ad8	100	return bt819_write(decoder, reg,
7fd011fb	101	(decoder->reg[reg] & ~(1 << bit)) \| (value ? (1 << bit) : 0));
1da177e4 LT	102	}
1da177e4 LT	103
c2179ad8	104	static int bt819_write_block(struct bt819 decoder, const u8 data, unsigned int len)
1da177e4	105	{
c2179ad8	106	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
1da177e4 LT	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 */
1da177e4	114	u8 block_data[32];
9aa45e34	115	int block_len;
1da177e4	116
1da177e4	117	while (len >= 2) {
9aa45e34 JD	118	block_len = 0;
9aa45e34 JD	119	block_data[block_len++] = reg = data[0];
1da177e4	120	do {
9aa45e34	121	block_data[block_len++] =
1da177e4 LT	122	decoder->reg[reg++] = data[1];
	123	len -= 2;
	124	data += 2;
7fd011fb HV	125	} while (len >= 2 && data[0] == reg && block_len < 32);
	126	ret = i2c_master_send(client, block_data, block_len);
	127	if (ret < 0)
1da177e4 LT	128	break;
	129	}
	130	} else {
	131	/* do some slow I2C emulation kind of thing */
	132	while (len >= 2) {
	133	reg = *data++;
c2179ad8 HV	134	ret = bt819_write(decoder, reg, *data++);
c2179ad8 HV	135	if (ret < 0)
1da177e4 LT	136	break;
	137	len -= 2;
	138	}
	139	}
	140
	141	return ret;
	142	}
	143
c2179ad8	144	static inline int bt819_read(struct bt819 *decoder, u8 reg)
1da177e4	145	{
c2179ad8 HV	146	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
c2179ad8 HV	147
1da177e4 LT	148	return i2c_smbus_read_byte_data(client, reg);
	149	}
	150
c2179ad8	151	static int bt819_init(struct v4l2_subdev *sd)
1da177e4	152	{
1da177e4	153	static unsigned char init[] = {
7fd011fb	154	/0x1f, 0x00,/ /* Reset */
1da177e4 LT	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 */
d56410e0	177	0x16, 0x07, /* 0x16 Video Timing Polarity
1da177e4	178	ACTIVE=active low
d56410e0	179	FIELD: high=odd,
1da177e4 LT	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
c2179ad8	187	struct bt819 *decoder = to_bt819(sd);
107063c6	188	struct timing *timing = &timing_data[(decoder->norm & V4L2_STD_525_60) ? 1 : 0];
1da177e4 LT	189
1da177e4 LT	190	init[0x03 * 2 - 1] =
7fd011fb HV	191	(((timing->vdelay >> 8) & 0x03) << 6) \|
	192	(((timing->vactive >> 8) & 0x03) << 4) \|
	193	(((timing->hdelay >> 8) & 0x03) << 2) \|
	194	((timing->hactive >> 8) & 0x03);
1da177e4 LT	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 */
107063c6	202	init[0x15 * 2 - 1] = (decoder->norm & V4L2_STD_625_50) ? 115 : 93; /* Chroma burst delay */
1da177e4	203	/* reset */
c2179ad8	204	bt819_write(decoder, 0x1f, 0x00);
1da177e4 LT	205	mdelay(1);
	206
	207	/* init */
c2179ad8	208	return bt819_write_block(decoder, init, sizeof(init));
1da177e4 LT	209	}
	210
	211	/* ----------------------------------------------------------------------- */
	212
c2179ad8	213	static int bt819_status(struct v4l2_subdev sd, u32 pstatus, v4l2_std_id *pstd)
1da177e4	214	{
c2179ad8 HV	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	}
1da177e4	235
c2179ad8 HV	236	static int bt819_querystd(struct v4l2_subdev sd, v4l2_std_id std)
	237	{
	238	return bt819_status(sd, NULL, std);
	239	}
1da177e4	240
c2179ad8 HV	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
cc5cef8e	251	v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
c2179ad8	252
1cd3c0fa HV	253	if (sd->v4l2_dev == NULL \|\| sd->v4l2_dev->notify == NULL)
	254	v4l2_err(sd, "no notify found!\n");
	255
c2179ad8	256	if (std & V4L2_STD_NTSC) {
1cd3c0fa	257	v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, 0);
c2179ad8 HV	258	bt819_setbit(decoder, 0x01, 0, 1);
	259	bt819_setbit(decoder, 0x01, 1, 0);
	260	bt819_setbit(decoder, 0x01, 5, 0);
	261	bt819_write(decoder, 0x18, 0x68);
	262	bt819_write(decoder, 0x19, 0x5d);
	263	/* bt819_setbit(decoder, 0x1a, 5, 1); */
	264	timing = &timing_data[1];
	265	} else if (std & V4L2_STD_PAL) {
1cd3c0fa	266	v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, 0);
c2179ad8 HV	267	bt819_setbit(decoder, 0x01, 0, 1);
	268	bt819_setbit(decoder, 0x01, 1, 1);
	269	bt819_setbit(decoder, 0x01, 5, 1);
	270	bt819_write(decoder, 0x18, 0x7f);
	271	bt819_write(decoder, 0x19, 0x72);
	272	/* bt819_setbit(decoder, 0x1a, 5, 0); */
	273	timing = &timing_data[0];
	274	} else {
cc5cef8e HV	275	v4l2_dbg(1, debug, sd, "unsupported norm %llx\n",
cc5cef8e HV	276	(unsigned long long)std);
c2179ad8	277	return -EINVAL;
1da177e4	278	}
c2179ad8 HV	279	bt819_write(decoder, 0x03,
	280	(((timing->vdelay >> 8) & 0x03) << 6) \|
	281	(((timing->vactive >> 8) & 0x03) << 4) \|
	282	(((timing->hdelay >> 8) & 0x03) << 2) \|
	283	((timing->hactive >> 8) & 0x03));
	284	bt819_write(decoder, 0x04, timing->vdelay & 0xff);
	285	bt819_write(decoder, 0x05, timing->vactive & 0xff);
	286	bt819_write(decoder, 0x06, timing->hdelay & 0xff);
	287	bt819_write(decoder, 0x07, timing->hactive & 0xff);
	288	bt819_write(decoder, 0x08, (timing->hscale >> 8) & 0xff);
	289	bt819_write(decoder, 0x09, timing->hscale & 0xff);
	290	decoder->norm = std;
1cd3c0fa	291	v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, 0);
c2179ad8 HV	292	return 0;
c2179ad8 HV	293	}
1da177e4	294
5325b427 HV	295	static int bt819_s_routing(struct v4l2_subdev *sd,
5325b427 HV	296	u32 input, u32 output, u32 config)
c2179ad8 HV	297	{
c2179ad8 HV	298	struct bt819 *decoder = to_bt819(sd);
1da177e4	299
5325b427	300	v4l2_dbg(1, debug, sd, "set input %x\n", input);
1da177e4	301
5325b427	302	if (input < 0 \|\| input > 7)
c2179ad8	303	return -EINVAL;
1da177e4	304
1cd3c0fa HV	305	if (sd->v4l2_dev == NULL \|\| sd->v4l2_dev->notify == NULL)
	306	v4l2_err(sd, "no notify found!\n");
	307
5325b427	308	if (decoder->input != input) {
1cd3c0fa	309	v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, 0);
5325b427	310	decoder->input = input;
c2179ad8 HV	311	/* select mode */
	312	if (decoder->input == 0) {
	313	bt819_setbit(decoder, 0x0b, 6, 0);
	314	bt819_setbit(decoder, 0x1a, 1, 1);
	315	} else {
	316	bt819_setbit(decoder, 0x0b, 6, 1);
	317	bt819_setbit(decoder, 0x1a, 1, 0);
1da177e4	318	}
1cd3c0fa	319	v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, 0);
7fd011fb	320	}
c2179ad8 HV	321	return 0;
c2179ad8 HV	322	}
1da177e4	323
c2179ad8 HV	324	static int bt819_s_stream(struct v4l2_subdev *sd, int enable)
	325	{
	326	struct bt819 *decoder = to_bt819(sd);
1da177e4	327
c2179ad8	328	v4l2_dbg(1, debug, sd, "enable output %x\n", enable);
1da177e4	329
c2179ad8 HV	330	if (decoder->enable != enable) {
	331	decoder->enable = enable;
	332	bt819_setbit(decoder, 0x16, 7, !enable);
7fd011fb	333	}
c2179ad8 HV	334	return 0;
c2179ad8 HV	335	}
1da177e4	336
c2179ad8 HV	337	static int bt819_queryctrl(struct v4l2_subdev sd, struct v4l2_queryctrl qc)
	338	{
	339	switch (qc->id) {
	340	case V4L2_CID_BRIGHTNESS:
	341	v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
	342	break;
107063c6	343
c2179ad8 HV	344	case V4L2_CID_CONTRAST:
	345	v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
	346	break;
107063c6	347
c2179ad8 HV	348	case V4L2_CID_SATURATION:
	349	v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
	350	break;
107063c6	351
c2179ad8 HV	352	case V4L2_CID_HUE:
c2179ad8 HV	353	v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
1da177e4	354	break;
c2179ad8 HV	355
	356	default:
	357	return -EINVAL;
7fd011fb	358	}
c2179ad8 HV	359	return 0;
c2179ad8 HV	360	}
1da177e4	361
c2179ad8 HV	362	static int bt819_s_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
	363	{
	364	struct bt819 *decoder = to_bt819(sd);
	365	int temp;
1da177e4	366
c2179ad8 HV	367	switch (ctrl->id) {
	368	case V4L2_CID_BRIGHTNESS:
	369	if (decoder->bright == ctrl->value)
107063c6	370	break;
c2179ad8 HV	371	decoder->bright = ctrl->value;
	372	bt819_write(decoder, 0x0a, decoder->bright);
	373	break;
1da177e4	374
c2179ad8 HV	375	case V4L2_CID_CONTRAST:
c2179ad8 HV	376	if (decoder->contrast == ctrl->value)
107063c6	377	break;
c2179ad8 HV	378	decoder->contrast = ctrl->value;
	379	bt819_write(decoder, 0x0c, decoder->contrast & 0xff);
	380	bt819_setbit(decoder, 0x0b, 2, ((decoder->contrast >> 8) & 0x01));
	381	break;
1da177e4	382
c2179ad8 HV	383	case V4L2_CID_SATURATION:
c2179ad8 HV	384	if (decoder->sat == ctrl->value)
107063c6	385	break;
c2179ad8 HV	386	decoder->sat = ctrl->value;
	387	bt819_write(decoder, 0x0d, (decoder->sat >> 7) & 0xff);
	388	bt819_setbit(decoder, 0x0b, 1, ((decoder->sat >> 15) & 0x01));
	389
	390	/* Ratio between U gain and V gain must stay the same as
	391	the ratio between the default U and V gain values. */
	392	temp = (decoder->sat * 180) / 254;
	393	bt819_write(decoder, 0x0e, (temp >> 7) & 0xff);
	394	bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01);
	395	break;
1da177e4	396
c2179ad8 HV	397	case V4L2_CID_HUE:
c2179ad8 HV	398	if (decoder->hue == ctrl->value)
107063c6	399	break;
c2179ad8 HV	400	decoder->hue = ctrl->value;
c2179ad8 HV	401	bt819_write(decoder, 0x0f, decoder->hue);
107063c6	402	break;
c2179ad8 HV	403
	404	default:
	405	return -EINVAL;
107063c6	406	}
c2179ad8 HV	407	return 0;
c2179ad8 HV	408	}
1da177e4	409
c2179ad8 HV	410	static int bt819_g_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
	411	{
	412	struct bt819 *decoder = to_bt819(sd);
1da177e4	413
c2179ad8 HV	414	switch (ctrl->id) {
	415	case V4L2_CID_BRIGHTNESS:
	416	ctrl->value = decoder->bright;
	417	break;
	418	case V4L2_CID_CONTRAST:
	419	ctrl->value = decoder->contrast;
	420	break;
	421	case V4L2_CID_SATURATION:
	422	ctrl->value = decoder->sat;
	423	break;
	424	case V4L2_CID_HUE:
	425	ctrl->value = decoder->hue;
1da177e4	426	break;
1da177e4 LT	427	default:
	428	return -EINVAL;
	429	}
1da177e4 LT	430	return 0;
	431	}
	432
c2179ad8 HV	433	static int bt819_g_chip_ident(struct v4l2_subdev sd, struct v4l2_dbg_chip_ident chip)
	434	{
	435	struct bt819 *decoder = to_bt819(sd);
	436	struct i2c_client *client = v4l2_get_subdevdata(sd);
	437
	438	return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
	439	}
	440
1da177e4 LT	441	/* ----------------------------------------------------------------------- */
1da177e4 LT	442
c2179ad8 HV	443	static const struct v4l2_subdev_core_ops bt819_core_ops = {
	444	.g_chip_ident = bt819_g_chip_ident,
	445	.g_ctrl = bt819_g_ctrl,
	446	.s_ctrl = bt819_s_ctrl,
	447	.queryctrl = bt819_queryctrl,
c2179ad8 HV	448	.s_std = bt819_s_std,
	449	};
	450
	451	static const struct v4l2_subdev_video_ops bt819_video_ops = {
	452	.s_routing = bt819_s_routing,
	453	.s_stream = bt819_s_stream,
	454	.querystd = bt819_querystd,
	455	.g_input_status = bt819_g_input_status,
	456	};
	457
	458	static const struct v4l2_subdev_ops bt819_ops = {
	459	.core = &bt819_core_ops,
c2179ad8 HV	460	.video = &bt819_video_ops,
	461	};
	462
	463	/* ----------------------------------------------------------------------- */
1da177e4	464
7fd011fb HV	465	static int bt819_probe(struct i2c_client *client,
7fd011fb HV	466	const struct i2c_device_id *id)
1da177e4	467	{
7fd011fb	468	int i, ver;
1da177e4	469	struct bt819 *decoder;
c2179ad8	470	struct v4l2_subdev *sd;
7fd011fb	471	const char *name;
1da177e4 LT	472
1da177e4 LT	473	/* Check if the adapter supports the needed features */
7fd011fb HV	474	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
7fd011fb HV	475	return -ENODEV;
1da177e4	476
c2179ad8 HV	477	decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
	478	if (decoder == NULL)
	479	return -ENOMEM;
	480	sd = &decoder->sd;
	481	v4l2_i2c_subdev_init(sd, client, &bt819_ops);
	482
	483	ver = bt819_read(decoder, 0x17);
7fd011fb HV	484	switch (ver & 0xf0) {
	485	case 0x70:
	486	name = "bt819a";
c2179ad8	487	decoder->ident = V4L2_IDENT_BT819A;
7fd011fb HV	488	break;
	489	case 0x60:
	490	name = "bt817a";
c2179ad8	491	decoder->ident = V4L2_IDENT_BT817A;
7fd011fb HV	492	break;
	493	case 0x20:
	494	name = "bt815a";
c2179ad8	495	decoder->ident = V4L2_IDENT_BT815A;
7fd011fb HV	496	break;
7fd011fb HV	497	default:
c2179ad8	498	v4l2_dbg(1, debug, sd,
7fd011fb HV	499	"unknown chip version 0x%02x\n", ver);
	500	return -ENODEV;
	501	}
	502
	503	v4l_info(client, "%s found @ 0x%x (%s)\n", name,
	504	client->addr << 1, client->adapter->name);
1da177e4	505
107063c6	506	decoder->norm = V4L2_STD_NTSC;
1da177e4 LT	507	decoder->input = 0;
1da177e4 LT	508	decoder->enable = 1;
107063c6 HV	509	decoder->bright = 0;
	510	decoder->contrast = 0xd8; /* 100% of original signal */
	511	decoder->hue = 0;
c2179ad8	512	decoder->sat = 0xfe; /* 100% of original signal */
1da177e4	513
c2179ad8	514	i = bt819_init(sd);
7fd011fb	515	if (i < 0)
c2179ad8	516	v4l2_dbg(1, debug, sd, "init status %d\n", i);
1da177e4 LT	517	return 0;
	518	}
	519
7fd011fb	520	static int bt819_remove(struct i2c_client *client)
1da177e4	521	{
c2179ad8 HV	522	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	523
	524	v4l2_device_unregister_subdev(sd);
	525	kfree(to_bt819(sd));
1da177e4 LT	526	return 0;
	527	}
	528
	529	/* ----------------------------------------------------------------------- */
	530
7fd011fb HV	531	static const struct i2c_device_id bt819_id[] = {
	532	{ "bt819a", 0 },
	533	{ "bt817a", 0 },
	534	{ "bt815a", 0 },
	535	{ }
	536	};
	537	MODULE_DEVICE_TABLE(i2c, bt819_id);
1da177e4	538
7fd011fb HV	539	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
7fd011fb HV	540	.name = "bt819",
7fd011fb HV	541	.probe = bt819_probe,
	542	.remove = bt819_remove,
	543	.id_table = bt819_id,
1da177e4	544	};