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linux/drivers/media/i2c/bt856.c
Sakari Ailus bcb63314e2 [media] media: Drop FSF's postal address from the source code files 
Drop the FSF's postal address from the source code files that typically
contain mostly the license text. Of the 628 removed instances, 578 are
outdated.

The patch has been created with the following command without manual edits:

git grep -l "675 Mass Ave\|59 Temple Place\|51 Franklin St" -- \
	drivers/media/ include/media|while read i; do i=$i perl -e '
open(F,"< $ENV{i}");
$a=join("", <F>);
$a =~ s/[ \t]*\*\n.*You should.*\n.*along with.*\n.*(\n.*USA.*$)?\n//m
	&& $a =~ s/(^.*)Or, (point your browser to) /$1To obtain the license, $2\n$1/m;
close(F);
open(F, "> $ENV{i}");
print F $a;
close(F);'; done

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
2017-01-27 11:38:09 -02:00

259 lines
6.4 KiB
C
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/*
* bt856 - BT856A 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.
*
* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
* - moved over to linux>=2.4.x i2c protocol (9/9/2002)
*
* 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.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/ioctl.h>
#include <linux/uaccess.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
MODULE_DESCRIPTION("Brooktree-856A 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)");
/* ----------------------------------------------------------------------- */
#define BT856_REG_OFFSET 0xDA
#define BT856_NR_REG 6
struct bt856 {
struct v4l2_subdev sd;
unsigned char reg[BT856_NR_REG];
v4l2_std_id norm;
};
static inline struct bt856 *to_bt856(struct v4l2_subdev *sd)
{
return container_of(sd, struct bt856, sd);
}
/* ----------------------------------------------------------------------- */
static inline int bt856_write(struct bt856 *encoder, u8 reg, u8 value)
{
struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
encoder->reg[reg - BT856_REG_OFFSET] = value;
return i2c_smbus_write_byte_data(client, reg, value);
}
static inline int bt856_setbit(struct bt856 *encoder, u8 reg, u8 bit, u8 value)
{
return bt856_write(encoder, reg,
(encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) |
(value ? (1 << bit) : 0));
}
static void bt856_dump(struct bt856 *encoder)
{
int i;
v4l2_info(&encoder->sd, "register dump:\n");
for (i = 0; i < BT856_NR_REG; i += 2)
printk(KERN_CONT " %02x", encoder->reg[i]);
printk(KERN_CONT "\n");
}
/* ----------------------------------------------------------------------- */
static int bt856_init(struct v4l2_subdev *sd, u32 arg)
{
struct bt856 *encoder = to_bt856(sd);
/* This is just for testing!!! */
v4l2_dbg(1, debug, sd, "init\n");
bt856_write(encoder, 0xdc, 0x18);
bt856_write(encoder, 0xda, 0);
bt856_write(encoder, 0xde, 0);
bt856_setbit(encoder, 0xdc, 3, 1);
/*bt856_setbit(encoder, 0xdc, 6, 0);*/
bt856_setbit(encoder, 0xdc, 4, 1);
if (encoder->norm & V4L2_STD_NTSC)
bt856_setbit(encoder, 0xdc, 2, 0);
else
bt856_setbit(encoder, 0xdc, 2, 1);
bt856_setbit(encoder, 0xdc, 1, 1);
bt856_setbit(encoder, 0xde, 4, 0);
bt856_setbit(encoder, 0xde, 3, 1);
if (debug != 0)
bt856_dump(encoder);
return 0;
}
static int bt856_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct bt856 *encoder = to_bt856(sd);
v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
if (std & V4L2_STD_NTSC) {
bt856_setbit(encoder, 0xdc, 2, 0);
} else if (std & V4L2_STD_PAL) {
bt856_setbit(encoder, 0xdc, 2, 1);
bt856_setbit(encoder, 0xda, 0, 0);
/*bt856_setbit(encoder, 0xda, 0, 1);*/
} else {
return -EINVAL;
}
encoder->norm = std;
if (debug != 0)
bt856_dump(encoder);
return 0;
}
static int bt856_s_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
struct bt856 *encoder = to_bt856(sd);
v4l2_dbg(1, debug, sd, "set input %d\n", input);
/* We only have video bus.
* input= 0: input is from bt819
* input= 1: input is from ZR36060 */
switch (input) {
case 0:
bt856_setbit(encoder, 0xde, 4, 0);
bt856_setbit(encoder, 0xde, 3, 1);
bt856_setbit(encoder, 0xdc, 3, 1);
bt856_setbit(encoder, 0xdc, 6, 0);
break;
case 1:
bt856_setbit(encoder, 0xde, 4, 0);
bt856_setbit(encoder, 0xde, 3, 1);
bt856_setbit(encoder, 0xdc, 3, 1);
bt856_setbit(encoder, 0xdc, 6, 1);
break;
case 2: /* Color bar */
bt856_setbit(encoder, 0xdc, 3, 0);
bt856_setbit(encoder, 0xde, 4, 1);
break;
default:
return -EINVAL;
}
if (debug != 0)
bt856_dump(encoder);
return 0;
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_subdev_core_ops bt856_core_ops = {
.init = bt856_init,
};
static const struct v4l2_subdev_video_ops bt856_video_ops = {
.s_std_output = bt856_s_std_output,
.s_routing = bt856_s_routing,
};
static const struct v4l2_subdev_ops bt856_ops = {
.core = &bt856_core_ops,
.video = &bt856_video_ops,
};
/* ----------------------------------------------------------------------- */
static int bt856_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct bt856 *encoder;
struct v4l2_subdev *sd;
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
if (encoder == NULL)
return -ENOMEM;
sd = &encoder->sd;
v4l2_i2c_subdev_init(sd, client, &bt856_ops);
encoder->norm = V4L2_STD_NTSC;
bt856_write(encoder, 0xdc, 0x18);
bt856_write(encoder, 0xda, 0);
bt856_write(encoder, 0xde, 0);
bt856_setbit(encoder, 0xdc, 3, 1);
/*bt856_setbit(encoder, 0xdc, 6, 0);*/
bt856_setbit(encoder, 0xdc, 4, 1);
if (encoder->norm & V4L2_STD_NTSC)
bt856_setbit(encoder, 0xdc, 2, 0);
else
bt856_setbit(encoder, 0xdc, 2, 1);
bt856_setbit(encoder, 0xdc, 1, 1);
bt856_setbit(encoder, 0xde, 4, 0);
bt856_setbit(encoder, 0xde, 3, 1);
if (debug != 0)
bt856_dump(encoder);
return 0;
}
static int bt856_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
v4l2_device_unregister_subdev(sd);
return 0;
}
static const struct i2c_device_id bt856_id[] = {
{ "bt856", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, bt856_id);
static struct i2c_driver bt856_driver = {
.driver = {
.name = "bt856",
},
.probe = bt856_probe,
.remove = bt856_remove,
.id_table = bt856_id,
};
module_i2c_driver(bt856_driver);
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