[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 <linux/i2c.h>
#include <linux/videodev2.h>
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-ctrls.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;
	struct v4l2_ctrl_handler hdl;
	unsigned char reg[32];

	v4l2_std_id norm;
	int ident;
	int input;
	int enable;
};

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

static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
	return &container_of(ctrl->handler, struct bt819, hdl)->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 = res;

	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, NULL);
		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, NULL);
		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, NULL);
	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 > 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, NULL);
		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, NULL);
	}
	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_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct v4l2_subdev *sd = to_sd(ctrl);
	struct bt819 *decoder = to_bt819(sd);
	int temp;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
		bt819_write(decoder, 0x0a, ctrl->val);
		break;

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

	case V4L2_CID_SATURATION:
		bt819_write(decoder, 0x0d, (ctrl->val >> 7) & 0xff);
		bt819_setbit(decoder, 0x0b, 1, ((ctrl->val >> 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 = (ctrl->val * 180) / 254;
		bt819_write(decoder, 0x0e, (temp >> 7) & 0xff);
		bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01);
		break;

	case V4L2_CID_HUE:
		bt819_write(decoder, 0x0f, ctrl->val);
		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_ctrl_ops bt819_ctrl_ops = {
	.s_ctrl = bt819_s_ctrl,
};

static const struct v4l2_subdev_core_ops bt819_core_ops = {
	.g_chip_ident = bt819_g_chip_ident,
	.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
	.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
	.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
	.g_ctrl = v4l2_subdev_g_ctrl,
	.s_ctrl = v4l2_subdev_s_ctrl,
	.queryctrl = v4l2_subdev_queryctrl,
	.querymenu = v4l2_subdev_querymenu,
	.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;

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

	v4l2_ctrl_handler_init(&decoder->hdl, 4);
	v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
			V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
	v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
			V4L2_CID_CONTRAST, 0, 511, 1, 0xd8);
	v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
			V4L2_CID_SATURATION, 0, 511, 1, 0xfe);
	v4l2_ctrl_new_std(&decoder->hdl, &bt819_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);
		kfree(decoder);
		return err;
	}
	v4l2_ctrl_handler_setup(&decoder->hdl);
	return 0;
}

static int bt819_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct bt819 *decoder = to_bt819(sd);

	v4l2_device_unregister_subdev(sd);
	v4l2_ctrl_handler_free(&decoder->hdl);
	kfree(decoder);
	return 0;
}

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

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

static struct i2c_driver bt819_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "bt819",
	},
	.probe		= bt819_probe,
	.remove		= bt819_remove,
	.id_table	= bt819_id,
};

static __init int init_bt819(void)
{
	return i2c_add_driver(&bt819_driver);
}

static __exit void exit_bt819(void)
{
	i2c_del_driver(&bt819_driver);
}

module_init(init_bt819);
module_exit(exit_bt819);
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	35	#include <linux/i2c.h>
c2179ad8	36	#include <linux/videodev2.h>
5a0e3ad6	37	#include <linux/slab.h>
c2179ad8 HV	38	#include <media/v4l2-device.h>
c2179ad8 HV	39	#include <media/v4l2-chip-ident.h>
bd84a65a	40	#include <media/v4l2-ctrls.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;
bd84a65a	56	struct v4l2_ctrl_handler hdl;
1da177e4 LT	57	unsigned char reg[32];
1da177e4 LT	58
107063c6	59	v4l2_std_id norm;
c2179ad8	60	int ident;
1da177e4 LT	61	int input;
1da177e4 LT	62	int enable;
1da177e4 LT	63	};
1da177e4 LT	64
c2179ad8 HV	65	static inline struct bt819 to_bt819(struct v4l2_subdev sd)
	66	{
	67	return container_of(sd, struct bt819, sd);
	68	}
	69
bd84a65a HV	70	static inline struct v4l2_subdev to_sd(struct v4l2_ctrl ctrl)
	71	{
	72	return &container_of(ctrl->handler, struct bt819, hdl)->sd;
	73	}
	74
1da177e4 LT	75	struct timing {
	76	int hactive;
	77	int hdelay;
	78	int vactive;
	79	int vdelay;
	80	int hscale;
	81	int vscale;
	82	};
	83
	84	/* for values, see the bt819 datasheet */
	85	static struct timing timing_data[] = {
	86	{864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000},
	87	{858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000},
	88	};
	89
1da177e4 LT	90	/* ----------------------------------------------------------------------- */
1da177e4 LT	91
c2179ad8	92	static inline int bt819_write(struct bt819 *decoder, u8 reg, u8 value)
1da177e4	93	{
c2179ad8	94	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
1da177e4 LT	95
	96	decoder->reg[reg] = value;
	97	return i2c_smbus_write_byte_data(client, reg, value);
	98	}
	99
c2179ad8	100	static inline int bt819_setbit(struct bt819 *decoder, u8 reg, u8 bit, u8 value)
1da177e4	101	{
c2179ad8	102	return bt819_write(decoder, reg,
7fd011fb	103	(decoder->reg[reg] & ~(1 << bit)) \| (value ? (1 << bit) : 0));
1da177e4 LT	104	}
1da177e4 LT	105
c2179ad8	106	static int bt819_write_block(struct bt819 decoder, const u8 data, unsigned int len)
1da177e4	107	{
c2179ad8	108	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
1da177e4 LT	109	int ret = -1;
	110	u8 reg;
	111
	112	/* the bt819 has an autoincrement function, use it if
	113	* the adapter understands raw I2C */
	114	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
	115	/* do raw I2C, not smbus compatible */
1da177e4	116	u8 block_data[32];
9aa45e34	117	int block_len;
1da177e4	118
1da177e4	119	while (len >= 2) {
9aa45e34 JD	120	block_len = 0;
9aa45e34 JD	121	block_data[block_len++] = reg = data[0];
1da177e4	122	do {
9aa45e34	123	block_data[block_len++] =
1da177e4 LT	124	decoder->reg[reg++] = data[1];
	125	len -= 2;
	126	data += 2;
7fd011fb HV	127	} while (len >= 2 && data[0] == reg && block_len < 32);
	128	ret = i2c_master_send(client, block_data, block_len);
	129	if (ret < 0)
1da177e4 LT	130	break;
	131	}
	132	} else {
	133	/* do some slow I2C emulation kind of thing */
	134	while (len >= 2) {
	135	reg = *data++;
c2179ad8 HV	136	ret = bt819_write(decoder, reg, *data++);
c2179ad8 HV	137	if (ret < 0)
1da177e4 LT	138	break;
	139	len -= 2;
	140	}
	141	}
	142
	143	return ret;
	144	}
	145
c2179ad8	146	static inline int bt819_read(struct bt819 *decoder, u8 reg)
1da177e4	147	{
c2179ad8 HV	148	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
c2179ad8 HV	149
1da177e4 LT	150	return i2c_smbus_read_byte_data(client, reg);
	151	}
	152
c2179ad8	153	static int bt819_init(struct v4l2_subdev *sd)
1da177e4	154	{
1da177e4	155	static unsigned char init[] = {
7fd011fb	156	/0x1f, 0x00,/ /* Reset */
1da177e4 LT	157	0x01, 0x59, /* 0x01 input format */
	158	0x02, 0x00, /* 0x02 temporal decimation */
	159	0x03, 0x12, /* 0x03 Cropping msb */
	160	0x04, 0x16, /* 0x04 Vertical Delay, lsb */
	161	0x05, 0xe0, /* 0x05 Vertical Active lsb */
	162	0x06, 0x80, /* 0x06 Horizontal Delay lsb */
	163	0x07, 0xd0, /* 0x07 Horizontal Active lsb */
	164	0x08, 0x00, /* 0x08 Horizontal Scaling msb */
	165	0x09, 0xf8, /* 0x09 Horizontal Scaling lsb */
	166	0x0a, 0x00, /* 0x0a Brightness control */
	167	0x0b, 0x30, /* 0x0b Miscellaneous control */
	168	0x0c, 0xd8, /* 0x0c Luma Gain lsb */
	169	0x0d, 0xfe, /* 0x0d Chroma Gain (U) lsb */
	170	0x0e, 0xb4, /* 0x0e Chroma Gain (V) msb */
	171	0x0f, 0x00, /* 0x0f Hue control */
	172	0x12, 0x04, /* 0x12 Output Format */
	173	0x13, 0x20, /* 0x13 Vertial Scaling msb 0x00
	174	chroma comb OFF, line drop scaling, interlace scaling
	175	BUG? Why does turning the chroma comb on fuck up color?
	176	Bug in the bt819 stepping on my board?
	177	*/
	178	0x14, 0x00, /* 0x14 Vertial Scaling lsb */
d56410e0	179	0x16, 0x07, /* 0x16 Video Timing Polarity
1da177e4	180	ACTIVE=active low
d56410e0	181	FIELD: high=odd,
1da177e4 LT	182	vreset=active high,
	183	hreset=active high */
	184	0x18, 0x68, /* 0x18 AGC Delay */
	185	0x19, 0x5d, /* 0x19 Burst Gate Delay */
	186	0x1a, 0x80, /* 0x1a ADC Interface */
	187	};
	188
c2179ad8	189	struct bt819 *decoder = to_bt819(sd);
107063c6	190	struct timing *timing = &timing_data[(decoder->norm & V4L2_STD_525_60) ? 1 : 0];
1da177e4 LT	191
1da177e4 LT	192	init[0x03 * 2 - 1] =
7fd011fb HV	193	(((timing->vdelay >> 8) & 0x03) << 6) \|
	194	(((timing->vactive >> 8) & 0x03) << 4) \|
	195	(((timing->hdelay >> 8) & 0x03) << 2) \|
	196	((timing->hactive >> 8) & 0x03);
1da177e4 LT	197	init[0x04 * 2 - 1] = timing->vdelay & 0xff;
	198	init[0x05 * 2 - 1] = timing->vactive & 0xff;
	199	init[0x06 * 2 - 1] = timing->hdelay & 0xff;
	200	init[0x07 * 2 - 1] = timing->hactive & 0xff;
	201	init[0x08 * 2 - 1] = timing->hscale >> 8;
	202	init[0x09 * 2 - 1] = timing->hscale & 0xff;
	203	/* 0x15 in array is address 0x19 */
107063c6	204	init[0x15 * 2 - 1] = (decoder->norm & V4L2_STD_625_50) ? 115 : 93; /* Chroma burst delay */
1da177e4	205	/* reset */
c2179ad8	206	bt819_write(decoder, 0x1f, 0x00);
1da177e4 LT	207	mdelay(1);
	208
	209	/* init */
c2179ad8	210	return bt819_write_block(decoder, init, sizeof(init));
1da177e4 LT	211	}
	212
	213	/* ----------------------------------------------------------------------- */
	214
c2179ad8	215	static int bt819_status(struct v4l2_subdev sd, u32 pstatus, v4l2_std_id *pstd)
1da177e4	216	{
c2179ad8 HV	217	struct bt819 *decoder = to_bt819(sd);
	218	int status = bt819_read(decoder, 0x00);
	219	int res = V4L2_IN_ST_NO_SIGNAL;
	220	v4l2_std_id std;
	221
	222	if ((status & 0x80))
	223	res = 0;
	224
	225	if ((status & 0x10))
	226	std = V4L2_STD_PAL;
	227	else
	228	std = V4L2_STD_NTSC;
	229	if (pstd)
	230	*pstd = std;
	231	if (pstatus)
ba08831b	232	*pstatus = res;
c2179ad8 HV	233
	234	v4l2_dbg(1, debug, sd, "get status %x\n", status);
	235	return 0;
	236	}
1da177e4	237
c2179ad8 HV	238	static int bt819_querystd(struct v4l2_subdev sd, v4l2_std_id std)
	239	{
	240	return bt819_status(sd, NULL, std);
	241	}
1da177e4	242
c2179ad8 HV	243	static int bt819_g_input_status(struct v4l2_subdev sd, u32 status)
	244	{
	245	return bt819_status(sd, status, NULL);
	246	}
	247
	248	static int bt819_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
	249	{
	250	struct bt819 *decoder = to_bt819(sd);
	251	struct timing *timing = NULL;
	252
cc5cef8e	253	v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
c2179ad8	254
1cd3c0fa HV	255	if (sd->v4l2_dev == NULL \|\| sd->v4l2_dev->notify == NULL)
	256	v4l2_err(sd, "no notify found!\n");
	257
c2179ad8	258	if (std & V4L2_STD_NTSC) {
b9fb9b79	259	v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
c2179ad8 HV	260	bt819_setbit(decoder, 0x01, 0, 1);
	261	bt819_setbit(decoder, 0x01, 1, 0);
	262	bt819_setbit(decoder, 0x01, 5, 0);
	263	bt819_write(decoder, 0x18, 0x68);
	264	bt819_write(decoder, 0x19, 0x5d);
	265	/* bt819_setbit(decoder, 0x1a, 5, 1); */
	266	timing = &timing_data[1];
	267	} else if (std & V4L2_STD_PAL) {
b9fb9b79	268	v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
c2179ad8 HV	269	bt819_setbit(decoder, 0x01, 0, 1);
	270	bt819_setbit(decoder, 0x01, 1, 1);
	271	bt819_setbit(decoder, 0x01, 5, 1);
	272	bt819_write(decoder, 0x18, 0x7f);
	273	bt819_write(decoder, 0x19, 0x72);
	274	/* bt819_setbit(decoder, 0x1a, 5, 0); */
	275	timing = &timing_data[0];
	276	} else {
cc5cef8e HV	277	v4l2_dbg(1, debug, sd, "unsupported norm %llx\n",
cc5cef8e HV	278	(unsigned long long)std);
c2179ad8	279	return -EINVAL;
1da177e4	280	}
c2179ad8 HV	281	bt819_write(decoder, 0x03,
	282	(((timing->vdelay >> 8) & 0x03) << 6) \|
	283	(((timing->vactive >> 8) & 0x03) << 4) \|
	284	(((timing->hdelay >> 8) & 0x03) << 2) \|
	285	((timing->hactive >> 8) & 0x03));
	286	bt819_write(decoder, 0x04, timing->vdelay & 0xff);
	287	bt819_write(decoder, 0x05, timing->vactive & 0xff);
	288	bt819_write(decoder, 0x06, timing->hdelay & 0xff);
	289	bt819_write(decoder, 0x07, timing->hactive & 0xff);
	290	bt819_write(decoder, 0x08, (timing->hscale >> 8) & 0xff);
	291	bt819_write(decoder, 0x09, timing->hscale & 0xff);
	292	decoder->norm = std;
b9fb9b79	293	v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, NULL);
c2179ad8 HV	294	return 0;
c2179ad8 HV	295	}
1da177e4	296
5325b427 HV	297	static int bt819_s_routing(struct v4l2_subdev *sd,
5325b427 HV	298	u32 input, u32 output, u32 config)
c2179ad8 HV	299	{
c2179ad8 HV	300	struct bt819 *decoder = to_bt819(sd);
1da177e4	301
5325b427	302	v4l2_dbg(1, debug, sd, "set input %x\n", input);
1da177e4	303
f14a2972	304	if (input > 7)
c2179ad8	305	return -EINVAL;
1da177e4	306
1cd3c0fa HV	307	if (sd->v4l2_dev == NULL \|\| sd->v4l2_dev->notify == NULL)
	308	v4l2_err(sd, "no notify found!\n");
	309
5325b427	310	if (decoder->input != input) {
b9fb9b79	311	v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
5325b427	312	decoder->input = input;
c2179ad8 HV	313	/* select mode */
	314	if (decoder->input == 0) {
	315	bt819_setbit(decoder, 0x0b, 6, 0);
	316	bt819_setbit(decoder, 0x1a, 1, 1);
	317	} else {
	318	bt819_setbit(decoder, 0x0b, 6, 1);
	319	bt819_setbit(decoder, 0x1a, 1, 0);
1da177e4	320	}
b9fb9b79	321	v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, NULL);
7fd011fb	322	}
c2179ad8 HV	323	return 0;
c2179ad8 HV	324	}
1da177e4	325
c2179ad8 HV	326	static int bt819_s_stream(struct v4l2_subdev *sd, int enable)
	327	{
	328	struct bt819 *decoder = to_bt819(sd);
1da177e4	329
c2179ad8	330	v4l2_dbg(1, debug, sd, "enable output %x\n", enable);
1da177e4	331
c2179ad8 HV	332	if (decoder->enable != enable) {
	333	decoder->enable = enable;
	334	bt819_setbit(decoder, 0x16, 7, !enable);
7fd011fb	335	}
c2179ad8 HV	336	return 0;
c2179ad8 HV	337	}
1da177e4	338
bd84a65a	339	static int bt819_s_ctrl(struct v4l2_ctrl *ctrl)
c2179ad8	340	{
bd84a65a	341	struct v4l2_subdev *sd = to_sd(ctrl);
c2179ad8 HV	342	struct bt819 *decoder = to_bt819(sd);
c2179ad8 HV	343	int temp;
1da177e4	344
c2179ad8 HV	345	switch (ctrl->id) {
c2179ad8 HV	346	case V4L2_CID_BRIGHTNESS:
bd84a65a	347	bt819_write(decoder, 0x0a, ctrl->val);
c2179ad8	348	break;
1da177e4	349
c2179ad8	350	case V4L2_CID_CONTRAST:
bd84a65a HV	351	bt819_write(decoder, 0x0c, ctrl->val & 0xff);
bd84a65a HV	352	bt819_setbit(decoder, 0x0b, 2, ((ctrl->val >> 8) & 0x01));
c2179ad8	353	break;
1da177e4	354
c2179ad8	355	case V4L2_CID_SATURATION:
bd84a65a HV	356	bt819_write(decoder, 0x0d, (ctrl->val >> 7) & 0xff);
bd84a65a HV	357	bt819_setbit(decoder, 0x0b, 1, ((ctrl->val >> 15) & 0x01));
c2179ad8 HV	358
	359	/* Ratio between U gain and V gain must stay the same as
	360	the ratio between the default U and V gain values. */
bd84a65a	361	temp = (ctrl->val * 180) / 254;
c2179ad8 HV	362	bt819_write(decoder, 0x0e, (temp >> 7) & 0xff);
	363	bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01);
	364	break;
1da177e4	365
c2179ad8	366	case V4L2_CID_HUE:
bd84a65a	367	bt819_write(decoder, 0x0f, ctrl->val);
107063c6	368	break;
c2179ad8 HV	369
	370	default:
	371	return -EINVAL;
107063c6	372	}
c2179ad8 HV	373	return 0;
c2179ad8 HV	374	}
1da177e4	375
c2179ad8 HV	376	static int bt819_g_chip_ident(struct v4l2_subdev sd, struct v4l2_dbg_chip_ident chip)
	377	{
	378	struct bt819 *decoder = to_bt819(sd);
	379	struct i2c_client *client = v4l2_get_subdevdata(sd);
	380
	381	return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
	382	}
	383
1da177e4 LT	384	/* ----------------------------------------------------------------------- */
1da177e4 LT	385
bd84a65a HV	386	static const struct v4l2_ctrl_ops bt819_ctrl_ops = {
	387	.s_ctrl = bt819_s_ctrl,
	388	};
	389
c2179ad8 HV	390	static const struct v4l2_subdev_core_ops bt819_core_ops = {
c2179ad8 HV	391	.g_chip_ident = bt819_g_chip_ident,
bd84a65a HV	392	.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
	393	.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
	394	.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
	395	.g_ctrl = v4l2_subdev_g_ctrl,
	396	.s_ctrl = v4l2_subdev_s_ctrl,
	397	.queryctrl = v4l2_subdev_queryctrl,
	398	.querymenu = v4l2_subdev_querymenu,
c2179ad8 HV	399	.s_std = bt819_s_std,
	400	};
	401
	402	static const struct v4l2_subdev_video_ops bt819_video_ops = {
	403	.s_routing = bt819_s_routing,
	404	.s_stream = bt819_s_stream,
	405	.querystd = bt819_querystd,
	406	.g_input_status = bt819_g_input_status,
	407	};
	408
	409	static const struct v4l2_subdev_ops bt819_ops = {
	410	.core = &bt819_core_ops,
c2179ad8 HV	411	.video = &bt819_video_ops,
	412	};
	413
	414	/* ----------------------------------------------------------------------- */
1da177e4	415
7fd011fb HV	416	static int bt819_probe(struct i2c_client *client,
7fd011fb HV	417	const struct i2c_device_id *id)
1da177e4	418	{
7fd011fb	419	int i, ver;
1da177e4	420	struct bt819 *decoder;
c2179ad8	421	struct v4l2_subdev *sd;
7fd011fb	422	const char *name;
1da177e4 LT	423
1da177e4 LT	424	/* Check if the adapter supports the needed features */
7fd011fb HV	425	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
7fd011fb HV	426	return -ENODEV;
1da177e4	427
c2179ad8 HV	428	decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
	429	if (decoder == NULL)
	430	return -ENOMEM;
	431	sd = &decoder->sd;
	432	v4l2_i2c_subdev_init(sd, client, &bt819_ops);
	433
	434	ver = bt819_read(decoder, 0x17);
7fd011fb HV	435	switch (ver & 0xf0) {
	436	case 0x70:
	437	name = "bt819a";
c2179ad8	438	decoder->ident = V4L2_IDENT_BT819A;
7fd011fb HV	439	break;
	440	case 0x60:
	441	name = "bt817a";
c2179ad8	442	decoder->ident = V4L2_IDENT_BT817A;
7fd011fb HV	443	break;
	444	case 0x20:
	445	name = "bt815a";
c2179ad8	446	decoder->ident = V4L2_IDENT_BT815A;
7fd011fb HV	447	break;
7fd011fb HV	448	default:
c2179ad8	449	v4l2_dbg(1, debug, sd,
7fd011fb HV	450	"unknown chip version 0x%02x\n", ver);
	451	return -ENODEV;
	452	}
	453
	454	v4l_info(client, "%s found @ 0x%x (%s)\n", name,
	455	client->addr << 1, client->adapter->name);
1da177e4	456
107063c6	457	decoder->norm = V4L2_STD_NTSC;
1da177e4 LT	458	decoder->input = 0;
1da177e4 LT	459	decoder->enable = 1;
1da177e4	460
c2179ad8	461	i = bt819_init(sd);
7fd011fb	462	if (i < 0)
c2179ad8	463	v4l2_dbg(1, debug, sd, "init status %d\n", i);
bd84a65a HV	464
	465	v4l2_ctrl_handler_init(&decoder->hdl, 4);
	466	v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
	467	V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
	468	v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
	469	V4L2_CID_CONTRAST, 0, 511, 1, 0xd8);
	470	v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
	471	V4L2_CID_SATURATION, 0, 511, 1, 0xfe);
	472	v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
	473	V4L2_CID_HUE, -128, 127, 1, 0);
	474	sd->ctrl_handler = &decoder->hdl;
	475	if (decoder->hdl.error) {
	476	int err = decoder->hdl.error;
	477
	478	v4l2_ctrl_handler_free(&decoder->hdl);
	479	kfree(decoder);
	480	return err;
	481	}
	482	v4l2_ctrl_handler_setup(&decoder->hdl);
1da177e4 LT	483	return 0;
	484	}
	485
7fd011fb	486	static int bt819_remove(struct i2c_client *client)
1da177e4	487	{
c2179ad8	488	struct v4l2_subdev *sd = i2c_get_clientdata(client);
bd84a65a	489	struct bt819 *decoder = to_bt819(sd);
c2179ad8 HV	490
c2179ad8 HV	491	v4l2_device_unregister_subdev(sd);
bd84a65a HV	492	v4l2_ctrl_handler_free(&decoder->hdl);
bd84a65a HV	493	kfree(decoder);
1da177e4 LT	494	return 0;
	495	}
	496
	497	/* ----------------------------------------------------------------------- */
	498
7fd011fb HV	499	static const struct i2c_device_id bt819_id[] = {
	500	{ "bt819a", 0 },
	501	{ "bt817a", 0 },
	502	{ "bt815a", 0 },
	503	{ }
	504	};
	505	MODULE_DEVICE_TABLE(i2c, bt819_id);
1da177e4	506
00cc8db8 HV	507	static struct i2c_driver bt819_driver = {
	508	.driver = {
	509	.owner = THIS_MODULE,
	510	.name = "bt819",
	511	},
	512	.probe = bt819_probe,
	513	.remove = bt819_remove,
	514	.id_table = bt819_id,
1da177e4	515	};
00cc8db8 HV	516
	517	static __init int init_bt819(void)
	518	{
	519	return i2c_add_driver(&bt819_driver);
	520	}
	521
	522	static __exit void exit_bt819(void)
	523	{
	524	i2c_del_driver(&bt819_driver);
	525	}
	526
	527	module_init(init_bt819);
	528	module_exit(exit_bt819);