272 lines
6.4 KiB
C
272 lines
6.4 KiB
C
/*
|
|
* Copyright (C) 2005-2006 Micronas USA Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License (Version 2) as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* 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/init.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/videodev2.h>
|
|
#include <linux/ioctl.h>
|
|
#include <media/v4l2-device.h>
|
|
#include <media/v4l2-ctrls.h>
|
|
#include <linux/slab.h>
|
|
|
|
MODULE_DESCRIPTION("TW9903 I2C subdev driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
/*
|
|
* This driver is based on the wis-tw9903.c source that was in
|
|
* drivers/staging/media/go7007. That source had commented out code for
|
|
* saturation and scaling (neither seemed to work). If anyone ever gets
|
|
* hardware to test this driver, then that code might be useful to look at.
|
|
* You need to get the kernel sources of, say, kernel 3.8 where that
|
|
* wis-tw9903 driver is still present.
|
|
*/
|
|
|
|
struct tw9903 {
|
|
struct v4l2_subdev sd;
|
|
struct v4l2_ctrl_handler hdl;
|
|
v4l2_std_id norm;
|
|
};
|
|
|
|
static inline struct tw9903 *to_state(struct v4l2_subdev *sd)
|
|
{
|
|
return container_of(sd, struct tw9903, sd);
|
|
}
|
|
|
|
static const u8 initial_registers[] = {
|
|
0x02, 0x44, /* input 1, composite */
|
|
0x03, 0x92, /* correct digital format */
|
|
0x04, 0x00,
|
|
0x05, 0x80, /* or 0x00 for PAL */
|
|
0x06, 0x40, /* second internal current reference */
|
|
0x07, 0x02, /* window */
|
|
0x08, 0x14, /* window */
|
|
0x09, 0xf0, /* window */
|
|
0x0a, 0x81, /* window */
|
|
0x0b, 0xd0, /* window */
|
|
0x0c, 0x8c,
|
|
0x0d, 0x00, /* scaling */
|
|
0x0e, 0x11, /* scaling */
|
|
0x0f, 0x00, /* scaling */
|
|
0x10, 0x00, /* brightness */
|
|
0x11, 0x60, /* contrast */
|
|
0x12, 0x01, /* sharpness */
|
|
0x13, 0x7f, /* U gain */
|
|
0x14, 0x5a, /* V gain */
|
|
0x15, 0x00, /* hue */
|
|
0x16, 0xc3, /* sharpness */
|
|
0x18, 0x00,
|
|
0x19, 0x58, /* vbi */
|
|
0x1a, 0x80,
|
|
0x1c, 0x0f, /* video norm */
|
|
0x1d, 0x7f, /* video norm */
|
|
0x20, 0xa0, /* clamping gain (working 0x50) */
|
|
0x21, 0x22,
|
|
0x22, 0xf0,
|
|
0x23, 0xfe,
|
|
0x24, 0x3c,
|
|
0x25, 0x38,
|
|
0x26, 0x44,
|
|
0x27, 0x20,
|
|
0x28, 0x00,
|
|
0x29, 0x15,
|
|
0x2a, 0xa0,
|
|
0x2b, 0x44,
|
|
0x2c, 0x37,
|
|
0x2d, 0x00,
|
|
0x2e, 0xa5, /* burst PLL control (working: a9) */
|
|
0x2f, 0xe0, /* 0xea is blue test frame -- 0xe0 for normal */
|
|
0x31, 0x00,
|
|
0x33, 0x22,
|
|
0x34, 0x11,
|
|
0x35, 0x35,
|
|
0x3b, 0x05,
|
|
0x06, 0xc0, /* reset device */
|
|
0x00, 0x00, /* Terminator (reg 0x00 is read-only) */
|
|
};
|
|
|
|
static int write_reg(struct v4l2_subdev *sd, u8 reg, u8 value)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
|
|
return i2c_smbus_write_byte_data(client, reg, value);
|
|
}
|
|
|
|
static int write_regs(struct v4l2_subdev *sd, const u8 *regs)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; regs[i] != 0x00; i += 2)
|
|
if (write_reg(sd, regs[i], regs[i + 1]) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
static int tw9903_s_video_routing(struct v4l2_subdev *sd, u32 input,
|
|
u32 output, u32 config)
|
|
{
|
|
write_reg(sd, 0x02, 0x40 | (input << 1));
|
|
return 0;
|
|
}
|
|
|
|
static int tw9903_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
|
|
{
|
|
struct tw9903 *dec = to_state(sd);
|
|
bool is_60hz = norm & V4L2_STD_525_60;
|
|
static const u8 config_60hz[] = {
|
|
0x05, 0x80,
|
|
0x07, 0x02,
|
|
0x08, 0x14,
|
|
0x09, 0xf0,
|
|
0, 0,
|
|
};
|
|
static const u8 config_50hz[] = {
|
|
0x05, 0x00,
|
|
0x07, 0x12,
|
|
0x08, 0x18,
|
|
0x09, 0x20,
|
|
0, 0,
|
|
};
|
|
|
|
write_regs(sd, is_60hz ? config_60hz : config_50hz);
|
|
dec->norm = norm;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int tw9903_s_ctrl(struct v4l2_ctrl *ctrl)
|
|
{
|
|
struct tw9903 *dec = container_of(ctrl->handler, struct tw9903, hdl);
|
|
struct v4l2_subdev *sd = &dec->sd;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_BRIGHTNESS:
|
|
write_reg(sd, 0x10, ctrl->val);
|
|
break;
|
|
case V4L2_CID_CONTRAST:
|
|
write_reg(sd, 0x11, ctrl->val);
|
|
break;
|
|
case V4L2_CID_HUE:
|
|
write_reg(sd, 0x15, ctrl->val);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int tw9903_log_status(struct v4l2_subdev *sd)
|
|
{
|
|
struct tw9903 *dec = to_state(sd);
|
|
bool is_60hz = dec->norm & V4L2_STD_525_60;
|
|
|
|
v4l2_info(sd, "Standard: %d Hz\n", is_60hz ? 60 : 50);
|
|
v4l2_ctrl_subdev_log_status(sd);
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------*/
|
|
|
|
static const struct v4l2_ctrl_ops tw9903_ctrl_ops = {
|
|
.s_ctrl = tw9903_s_ctrl,
|
|
};
|
|
|
|
static const struct v4l2_subdev_core_ops tw9903_core_ops = {
|
|
.log_status = tw9903_log_status,
|
|
};
|
|
|
|
static const struct v4l2_subdev_video_ops tw9903_video_ops = {
|
|
.s_std = tw9903_s_std,
|
|
.s_routing = tw9903_s_video_routing,
|
|
};
|
|
|
|
static const struct v4l2_subdev_ops tw9903_ops = {
|
|
.core = &tw9903_core_ops,
|
|
.video = &tw9903_video_ops,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------------*/
|
|
|
|
static int tw9903_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct tw9903 *dec;
|
|
struct v4l2_subdev *sd;
|
|
struct v4l2_ctrl_handler *hdl;
|
|
|
|
/* Check if the adapter supports the needed features */
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -EIO;
|
|
|
|
v4l_info(client, "chip found @ 0x%02x (%s)\n",
|
|
client->addr << 1, client->adapter->name);
|
|
|
|
dec = devm_kzalloc(&client->dev, sizeof(*dec), GFP_KERNEL);
|
|
if (dec == NULL)
|
|
return -ENOMEM;
|
|
sd = &dec->sd;
|
|
v4l2_i2c_subdev_init(sd, client, &tw9903_ops);
|
|
hdl = &dec->hdl;
|
|
v4l2_ctrl_handler_init(hdl, 4);
|
|
v4l2_ctrl_new_std(hdl, &tw9903_ctrl_ops,
|
|
V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
|
|
v4l2_ctrl_new_std(hdl, &tw9903_ctrl_ops,
|
|
V4L2_CID_CONTRAST, 0, 255, 1, 0x60);
|
|
v4l2_ctrl_new_std(hdl, &tw9903_ctrl_ops,
|
|
V4L2_CID_HUE, -128, 127, 1, 0);
|
|
sd->ctrl_handler = hdl;
|
|
if (hdl->error) {
|
|
int err = hdl->error;
|
|
|
|
v4l2_ctrl_handler_free(hdl);
|
|
return err;
|
|
}
|
|
|
|
/* Initialize tw9903 */
|
|
dec->norm = V4L2_STD_NTSC;
|
|
|
|
if (write_regs(sd, initial_registers) < 0) {
|
|
v4l2_err(client, "error initializing TW9903\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tw9903_remove(struct i2c_client *client)
|
|
{
|
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
|
|
|
v4l2_device_unregister_subdev(sd);
|
|
v4l2_ctrl_handler_free(&to_state(sd)->hdl);
|
|
return 0;
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
static const struct i2c_device_id tw9903_id[] = {
|
|
{ "tw9903", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tw9903_id);
|
|
|
|
static struct i2c_driver tw9903_driver = {
|
|
.driver = {
|
|
.name = "tw9903",
|
|
},
|
|
.probe = tw9903_probe,
|
|
.remove = tw9903_remove,
|
|
.id_table = tw9903_id,
|
|
};
|
|
module_i2c_driver(tw9903_driver);
|