drivers/media/video/bt866.c - maze/linux - Git at Google

 /*
     bt866 - BT866 Digital Video Encoder (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>

     This code was modify/ported from the saa7111 driver written
     by Dave Perks.

     This code was adapted for the bt866 by Christer Weinigel and ported
     to 2.6 by Martin Samuelsson.

     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 <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-866 video encoder 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 bt866 {
 	struct v4l2_subdev sd;
 	u8 reg[256];
 };

 static inline struct bt866 *to_bt866(struct v4l2_subdev *sd)
 {
 	return container_of(sd, struct bt866, sd);
 }

 static int bt866_write(struct bt866 *encoder, u8 subaddr, u8 data)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
 	u8 buffer[2];
 	int err;

 	buffer[0] = subaddr;
 	buffer[1] = data;

 	encoder->reg[subaddr] = data;

 	v4l_dbg(1, debug, client, "write 0x%02x = 0x%02x\n", subaddr, data);

 	for (err = 0; err < 3;) {
 		if (i2c_master_send(client, buffer, 2) == 2)
 			break;
 		err++;
 		v4l_warn(client, "error #%d writing to 0x%02x\n",
 				err, subaddr);
 		schedule_timeout_interruptible(msecs_to_jiffies(100));
 	}
 	if (err == 3) {
 		v4l_warn(client, "giving up\n");
 		return -1;
 	}

 	return 0;
 }

 static int bt866_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 {
 	v4l2_dbg(1, debug, sd, "set norm %llx\n", std);

 	/* Only PAL supported by this driver at the moment! */
 	if (!(std & V4L2_STD_NTSC))
 		return -EINVAL;
 	return 0;
 }

 static int bt866_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
 {
 	static const __u8 init[] = {
 		0xc8, 0xcc, /* CRSCALE */
 		0xca, 0x91, /* CBSCALE */
 		0xcc, 0x24, /* YC16 | OSDNUM */
 		0xda, 0x00, /*  */
 		0xdc, 0x24, /* SETMODE | PAL */
 		0xde, 0x02, /* EACTIVE */

 		/* overlay colors */
 		0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */
 		0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */
 		0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */
 		0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */
 		0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */
 		0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */
 		0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */
 		0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */

 		0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */
 		0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */
 		0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */
 		0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */
 		0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */
 		0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */
 		0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */
 		0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */
 	};
 	struct bt866 *encoder = to_bt866(sd);
 	u8 val;
 	int i;

 	for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2)
 		bt866_write(encoder, init[i], init[i+1]);

 	val = encoder->reg[0xdc];

 	if (route->input == 0)
 		val |= 0x40; /* CBSWAP */
 	else
 		val &= ~0x40; /* !CBSWAP */

 	bt866_write(encoder, 0xdc, val);

 	val = encoder->reg[0xcc];
 	if (route->input == 2)
 		val |= 0x01; /* OSDBAR */
 	else
 		val &= ~0x01; /* !OSDBAR */
 	bt866_write(encoder, 0xcc, val);

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

 	switch (route->input) {
 	case 0:
 	case 1:
 	case 2:
 		break;
 	default:
 		return -EINVAL;
 	}
 	return 0;
 }

 #if 0
 /* Code to setup square pixels, might be of some use in the future,
    but is currently unused. */
 	val = encoder->reg[0xdc];
 	if (*iarg)
 		val |= 1; /* SQUARE */
 	else
 		val &= ~1; /* !SQUARE */
 	bt866_write(client, 0xdc, val);
 #endif

 static int bt866_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);

 	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_BT866, 0);
 }

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

 static const struct v4l2_subdev_core_ops bt866_core_ops = {
 	.g_chip_ident = bt866_g_chip_ident,
 };

 static const struct v4l2_subdev_video_ops bt866_video_ops = {
 	.s_std_output = bt866_s_std_output,
 	.s_routing = bt866_s_routing,
 };

 static const struct v4l2_subdev_ops bt866_ops = {
 	.core = &bt866_core_ops,
 	.video = &bt866_video_ops,
 };

 static int bt866_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
 	struct bt866 *encoder;
 	struct v4l2_subdev *sd;

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

 	encoder = kzalloc(sizeof(*encoder), GFP_KERNEL);
 	if (encoder == NULL)
 		return -ENOMEM;
 	sd = &encoder->sd;
 	v4l2_i2c_subdev_init(sd, client, &bt866_ops);
 	return 0;
 }

 static int bt866_remove(struct i2c_client *client)
 {
 	struct v4l2_subdev *sd = i2c_get_clientdata(client);

 	v4l2_device_unregister_subdev(sd);
 	kfree(to_bt866(sd));
 	return 0;
 }

 static const struct i2c_device_id bt866_id[] = {
 	{ "bt866", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, bt866_id);

 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 	.name = "bt866",
 	.probe = bt866_probe,
 	.remove = bt866_remove,
 	.id_table = bt866_id,
 };
	/*
	bt866 - BT866 Digital Video Encoder (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>

	This code was modify/ported from the saa7111 driver written
	by Dave Perks.

	This code was adapted for the bt866 by Christer Weinigel and ported
	to 2.6 by Martin Samuelsson.

	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 <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-866 video encoder 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 bt866 {
	struct v4l2_subdev sd;
	u8 reg[256];
	};

	static inline struct bt866 to_bt866(struct v4l2_subdev sd)
	{
	return container_of(sd, struct bt866, sd);
	}

	static int bt866_write(struct bt866 *encoder, u8 subaddr, u8 data)
	{
	struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
	u8 buffer[2];
	int err;

	buffer[0] = subaddr;
	buffer[1] = data;

	encoder->reg[subaddr] = data;

	v4l_dbg(1, debug, client, "write 0x%02x = 0x%02x\n", subaddr, data);

	for (err = 0; err < 3;) {
	if (i2c_master_send(client, buffer, 2) == 2)
	break;
	err++;
	v4l_warn(client, "error #%d writing to 0x%02x\n",
	err, subaddr);
	schedule_timeout_interruptible(msecs_to_jiffies(100));
	}
	if (err == 3) {
	v4l_warn(client, "giving up\n");
	return -1;
	}

	return 0;
	}

	static int bt866_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
	{
	v4l2_dbg(1, debug, sd, "set norm %llx\n", std);

	/* Only PAL supported by this driver at the moment! */
	if (!(std & V4L2_STD_NTSC))
	return -EINVAL;
	return 0;
	}

	static int bt866_s_routing(struct v4l2_subdev sd, const struct v4l2_routing route)
	{
	static const __u8 init[] = {
	0xc8, 0xcc, /* CRSCALE */
	0xca, 0x91, /* CBSCALE */
	0xcc, 0x24, /* YC16 \| OSDNUM */
	0xda, 0x00, /* */
	0xdc, 0x24, /* SETMODE \| PAL */
	0xde, 0x02, /* EACTIVE */

	/* overlay colors */
	0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */
	0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */
	0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */
	0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */
	0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */
	0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */
	0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */
	0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */

	0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */
	0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */
	0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */
	0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */
	0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */
	0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */
	0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */
	0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */
	};
	struct bt866 *encoder = to_bt866(sd);
	u8 val;
	int i;

	for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2)
	bt866_write(encoder, init[i], init[i+1]);

	val = encoder->reg[0xdc];

	if (route->input == 0)
	val \|= 0x40; /* CBSWAP */
	else
	val &= ~0x40; /* !CBSWAP */

	bt866_write(encoder, 0xdc, val);

	val = encoder->reg[0xcc];
	if (route->input == 2)
	val \|= 0x01; /* OSDBAR */
	else
	val &= ~0x01; /* !OSDBAR */
	bt866_write(encoder, 0xcc, val);

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

	switch (route->input) {
	case 0:
	case 1:
	case 2:
	break;
	default:
	return -EINVAL;
	}
	return 0;
	}

	#if 0
	/* Code to setup square pixels, might be of some use in the future,
	but is currently unused. */
	val = encoder->reg[0xdc];
	if (*iarg)
	val \|= 1; /* SQUARE */
	else
	val &= ~1; /* !SQUARE */
	bt866_write(client, 0xdc, val);
	#endif

	static int bt866_g_chip_ident(struct v4l2_subdev sd, struct v4l2_dbg_chip_ident chip)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_BT866, 0);
	}

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

	static const struct v4l2_subdev_core_ops bt866_core_ops = {
	.g_chip_ident = bt866_g_chip_ident,
	};

	static const struct v4l2_subdev_video_ops bt866_video_ops = {
	.s_std_output = bt866_s_std_output,
	.s_routing = bt866_s_routing,
	};

	static const struct v4l2_subdev_ops bt866_ops = {
	.core = &bt866_core_ops,
	.video = &bt866_video_ops,
	};

	static int bt866_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	struct bt866 *encoder;
	struct v4l2_subdev *sd;

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

	encoder = kzalloc(sizeof(*encoder), GFP_KERNEL);
	if (encoder == NULL)
	return -ENOMEM;
	sd = &encoder->sd;
	v4l2_i2c_subdev_init(sd, client, &bt866_ops);
	return 0;
	}

	static int bt866_remove(struct i2c_client *client)
	{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);

	v4l2_device_unregister_subdev(sd);
	kfree(to_bt866(sd));
	return 0;
	}

	static const struct i2c_device_id bt866_id[] = {
	{ "bt866", 0 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, bt866_id);

	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "bt866",
	.probe = bt866_probe,
	.remove = bt866_remove,
	.id_table = bt866_id,
	};