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linux-next/drivers/media/i2c/tw2804.c
Thomas Gleixner 1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:41 -07:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2005-2006 Micronas USA Inc.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <linux/ioctl.h>
#include <linux/slab.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#define TW2804_REG_AUTOGAIN 0x02
#define TW2804_REG_HUE 0x0f
#define TW2804_REG_SATURATION 0x10
#define TW2804_REG_CONTRAST 0x11
#define TW2804_REG_BRIGHTNESS 0x12
#define TW2804_REG_COLOR_KILLER 0x14
#define TW2804_REG_GAIN 0x3c
#define TW2804_REG_CHROMA_GAIN 0x3d
#define TW2804_REG_BLUE_BALANCE 0x3e
#define TW2804_REG_RED_BALANCE 0x3f
struct tw2804 {
struct v4l2_subdev sd;
struct v4l2_ctrl_handler hdl;
u8 channel:2;
u8 input:1;
int norm;
};
static const u8 global_registers[] = {
0x39, 0x00,
0x3a, 0xff,
0x3b, 0x84,
0x3c, 0x80,
0x3d, 0x80,
0x3e, 0x82,
0x3f, 0x82,
0x78, 0x00,
0xff, 0xff, /* Terminator (reg 0xff does not exist) */
};
static const u8 channel_registers[] = {
0x01, 0xc4,
0x02, 0xa5,
0x03, 0x20,
0x04, 0xd0,
0x05, 0x20,
0x06, 0xd0,
0x07, 0x88,
0x08, 0x20,
0x09, 0x07,
0x0a, 0xf0,
0x0b, 0x07,
0x0c, 0xf0,
0x0d, 0x40,
0x0e, 0xd2,
0x0f, 0x80,
0x10, 0x80,
0x11, 0x80,
0x12, 0x80,
0x13, 0x1f,
0x14, 0x00,
0x15, 0x00,
0x16, 0x00,
0x17, 0x00,
0x18, 0xff,
0x19, 0xff,
0x1a, 0xff,
0x1b, 0xff,
0x1c, 0xff,
0x1d, 0xff,
0x1e, 0xff,
0x1f, 0xff,
0x20, 0x07,
0x21, 0x07,
0x22, 0x00,
0x23, 0x91,
0x24, 0x51,
0x25, 0x03,
0x26, 0x00,
0x27, 0x00,
0x28, 0x00,
0x29, 0x00,
0x2a, 0x00,
0x2b, 0x00,
0x2c, 0x00,
0x2d, 0x00,
0x2e, 0x00,
0x2f, 0x00,
0x30, 0x00,
0x31, 0x00,
0x32, 0x00,
0x33, 0x00,
0x34, 0x00,
0x35, 0x00,
0x36, 0x00,
0x37, 0x00,
0xff, 0xff, /* Terminator (reg 0xff does not exist) */
};
static int write_reg(struct i2c_client *client, u8 reg, u8 value, u8 channel)
{
return i2c_smbus_write_byte_data(client, reg | (channel << 6), value);
}
static int write_regs(struct i2c_client *client, const u8 *regs, u8 channel)
{
int ret;
int i;
for (i = 0; regs[i] != 0xff; i += 2) {
ret = i2c_smbus_write_byte_data(client,
regs[i] | (channel << 6), regs[i + 1]);
if (ret < 0)
return ret;
}
return 0;
}
static int read_reg(struct i2c_client *client, u8 reg, u8 channel)
{
return i2c_smbus_read_byte_data(client, (reg) | (channel << 6));
}
static inline struct tw2804 *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct tw2804, sd);
}
static inline struct tw2804 *to_state_from_ctrl(struct v4l2_ctrl *ctrl)
{
return container_of(ctrl->handler, struct tw2804, hdl);
}
static int tw2804_log_status(struct v4l2_subdev *sd)
{
struct tw2804 *state = to_state(sd);
v4l2_info(sd, "Standard: %s\n",
state->norm & V4L2_STD_525_60 ? "60 Hz" : "50 Hz");
v4l2_info(sd, "Channel: %d\n", state->channel);
v4l2_info(sd, "Input: %d\n", state->input);
return v4l2_ctrl_subdev_log_status(sd);
}
/*
* These volatile controls are needed because all four channels share
* these controls. So a change made to them through one channel would
* require another channel to be updated.
*
* Normally this would have been done in a different way, but since the one
* board that uses this driver sees this single chip as if it was on four
* different i2c adapters (each adapter belonging to a separate instance of
* the same USB driver) there is no reliable method that I have found to let
* the instances know about each other.
*
* So implementing these global registers as volatile is the best we can do.
*/
static int tw2804_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
struct tw2804 *state = to_state_from_ctrl(ctrl);
struct i2c_client *client = v4l2_get_subdevdata(&state->sd);
switch (ctrl->id) {
case V4L2_CID_GAIN:
ctrl->val = read_reg(client, TW2804_REG_GAIN, 0);
return 0;
case V4L2_CID_CHROMA_GAIN:
ctrl->val = read_reg(client, TW2804_REG_CHROMA_GAIN, 0);
return 0;
case V4L2_CID_BLUE_BALANCE:
ctrl->val = read_reg(client, TW2804_REG_BLUE_BALANCE, 0);
return 0;
case V4L2_CID_RED_BALANCE:
ctrl->val = read_reg(client, TW2804_REG_RED_BALANCE, 0);
return 0;
}
return 0;
}
static int tw2804_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct tw2804 *state = to_state_from_ctrl(ctrl);
struct i2c_client *client = v4l2_get_subdevdata(&state->sd);
int addr;
int reg;
switch (ctrl->id) {
case V4L2_CID_AUTOGAIN:
addr = TW2804_REG_AUTOGAIN;
reg = read_reg(client, addr, state->channel);
if (reg < 0)
return reg;
if (ctrl->val == 0)
reg &= ~(1 << 7);
else
reg |= 1 << 7;
return write_reg(client, addr, reg, state->channel);
case V4L2_CID_COLOR_KILLER:
addr = TW2804_REG_COLOR_KILLER;
reg = read_reg(client, addr, state->channel);
if (reg < 0)
return reg;
reg = (reg & ~(0x03)) | (ctrl->val == 0 ? 0x02 : 0x03);
return write_reg(client, addr, reg, state->channel);
case V4L2_CID_GAIN:
return write_reg(client, TW2804_REG_GAIN, ctrl->val, 0);
case V4L2_CID_CHROMA_GAIN:
return write_reg(client, TW2804_REG_CHROMA_GAIN, ctrl->val, 0);
case V4L2_CID_BLUE_BALANCE:
return write_reg(client, TW2804_REG_BLUE_BALANCE, ctrl->val, 0);
case V4L2_CID_RED_BALANCE:
return write_reg(client, TW2804_REG_RED_BALANCE, ctrl->val, 0);
case V4L2_CID_BRIGHTNESS:
return write_reg(client, TW2804_REG_BRIGHTNESS,
ctrl->val, state->channel);
case V4L2_CID_CONTRAST:
return write_reg(client, TW2804_REG_CONTRAST,
ctrl->val, state->channel);
case V4L2_CID_SATURATION:
return write_reg(client, TW2804_REG_SATURATION,
ctrl->val, state->channel);
case V4L2_CID_HUE:
return write_reg(client, TW2804_REG_HUE,
ctrl->val, state->channel);
default:
break;
}
return -EINVAL;
}
static int tw2804_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
{
struct tw2804 *dec = to_state(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
bool is_60hz = norm & V4L2_STD_525_60;
u8 regs[] = {
0x01, is_60hz ? 0xc4 : 0x84,
0x09, is_60hz ? 0x07 : 0x04,
0x0a, is_60hz ? 0xf0 : 0x20,
0x0b, is_60hz ? 0x07 : 0x04,
0x0c, is_60hz ? 0xf0 : 0x20,
0x0d, is_60hz ? 0x40 : 0x4a,
0x16, is_60hz ? 0x00 : 0x40,
0x17, is_60hz ? 0x00 : 0x40,
0x20, is_60hz ? 0x07 : 0x0f,
0x21, is_60hz ? 0x07 : 0x0f,
0xff, 0xff,
};
write_regs(client, regs, dec->channel);
dec->norm = norm;
return 0;
}
static int tw2804_s_video_routing(struct v4l2_subdev *sd, u32 input, u32 output,
u32 config)
{
struct tw2804 *dec = to_state(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int reg;
if (config && config - 1 != dec->channel) {
if (config > 4) {
dev_err(&client->dev,
"channel %d is not between 1 and 4!\n", config);
return -EINVAL;
}
dec->channel = config - 1;
dev_dbg(&client->dev, "initializing TW2804 channel %d\n",
dec->channel);
if (dec->channel == 0 &&
write_regs(client, global_registers, 0) < 0) {
dev_err(&client->dev,
"error initializing TW2804 global registers\n");
return -EIO;
}
if (write_regs(client, channel_registers, dec->channel) < 0) {
dev_err(&client->dev,
"error initializing TW2804 channel %d\n",
dec->channel);
return -EIO;
}
}
if (input > 1)
return -EINVAL;
if (input == dec->input)
return 0;
reg = read_reg(client, 0x22, dec->channel);
if (reg >= 0) {
if (input == 0)
reg &= ~(1 << 2);
else
reg |= 1 << 2;
reg = write_reg(client, 0x22, reg, dec->channel);
}
if (reg >= 0)
dec->input = input;
else
return reg;
return 0;
}
static const struct v4l2_ctrl_ops tw2804_ctrl_ops = {
.g_volatile_ctrl = tw2804_g_volatile_ctrl,
.s_ctrl = tw2804_s_ctrl,
};
static const struct v4l2_subdev_video_ops tw2804_video_ops = {
.s_std = tw2804_s_std,
.s_routing = tw2804_s_video_routing,
};
static const struct v4l2_subdev_core_ops tw2804_core_ops = {
.log_status = tw2804_log_status,
};
static const struct v4l2_subdev_ops tw2804_ops = {
.core = &tw2804_core_ops,
.video = &tw2804_video_ops,
};
static int tw2804_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
struct tw2804 *state;
struct v4l2_subdev *sd;
struct v4l2_ctrl *ctrl;
int err;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
if (state == NULL)
return -ENOMEM;
sd = &state->sd;
v4l2_i2c_subdev_init(sd, client, &tw2804_ops);
state->channel = -1;
state->norm = V4L2_STD_NTSC;
v4l2_ctrl_handler_init(&state->hdl, 10);
v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops,
V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops,
V4L2_CID_CONTRAST, 0, 255, 1, 128);
v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops,
V4L2_CID_SATURATION, 0, 255, 1, 128);
v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops,
V4L2_CID_HUE, 0, 255, 1, 128);
v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops,
V4L2_CID_COLOR_KILLER, 0, 1, 1, 0);
v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops,
V4L2_CID_AUTOGAIN, 0, 1, 1, 0);
ctrl = v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops,
V4L2_CID_GAIN, 0, 255, 1, 128);
if (ctrl)
ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
ctrl = v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops,
V4L2_CID_CHROMA_GAIN, 0, 255, 1, 128);
if (ctrl)
ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
ctrl = v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops,
V4L2_CID_BLUE_BALANCE, 0, 255, 1, 122);
if (ctrl)
ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
ctrl = v4l2_ctrl_new_std(&state->hdl, &tw2804_ctrl_ops,
V4L2_CID_RED_BALANCE, 0, 255, 1, 122);
if (ctrl)
ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
sd->ctrl_handler = &state->hdl;
err = state->hdl.error;
if (err) {
v4l2_ctrl_handler_free(&state->hdl);
return err;
}
v4l_info(client, "chip found @ 0x%02x (%s)\n",
client->addr << 1, client->adapter->name);
return 0;
}
static int tw2804_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct tw2804 *state = to_state(sd);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&state->hdl);
return 0;
}
static const struct i2c_device_id tw2804_id[] = {
{ "tw2804", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tw2804_id);
static struct i2c_driver tw2804_driver = {
.driver = {
.name = "tw2804",
},
.probe = tw2804_probe,
.remove = tw2804_remove,
.id_table = tw2804_id,
};
module_i2c_driver(tw2804_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("TW2804/TW2802 V4L2 i2c driver");
MODULE_AUTHOR("Micronas USA Inc");
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