/*
* 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.
*
* 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., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*/
#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 "wis-i2c.h"
struct wis_tw2804 {
int channel;
int norm;
int brightness;
int contrast;
int saturation;
int hue;
};
static u8 global_registers[] =
{
0x39, 0x00,
0x3a, 0xff,
0x3b, 0x84,
0x3c, 0x80,
0x3d, 0x80,
0x3e, 0x82,
0x3f, 0x82,
0xff, 0xff, /* Terminator (reg 0xff does not exist) */
};
static 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, int channel)
{
return i2c_smbus_write_byte_data(client, reg | (channel << 6), value);
}
static int write_regs(struct i2c_client *client, u8 *regs, int channel)
{
int i;
for (i = 0; regs[i] != 0xff; i += 2)
if (i2c_smbus_write_byte_data(client,
regs[i] | (channel << 6), regs[i + 1]) < 0)
return -1;
return 0;
}
static int wis_tw2804_command(struct i2c_client *client,
unsigned int cmd, void *arg)
{
struct wis_tw2804 *dec = i2c_get_clientdata(client);
if (cmd == DECODER_SET_CHANNEL) {
int *input = arg;
if (*input < 0 || *input > 3) {
printk(KERN_ERR "wis-tw2804: channel %d is not "
"between 0 and 3!\n", *input);
return 0;
}
dec->channel = *input;
printk(KERN_DEBUG "wis-tw2804: initializing TW2804 "
"channel %d\n", dec->channel);
if (dec->channel == 0 &&
write_regs(client, global_registers, 0) < 0) {
printk(KERN_ERR "wis-tw2804: error initializing "
"TW2804 global registers\n");
return 0;
}
if (write_regs(client, channel_registers, dec->channel) < 0) {
printk(KERN_ERR "wis-tw2804: error initializing "
"TW2804 channel %d\n", dec->channel);
return 0;
}
return 0;
}
if (dec->channel < 0) {
printk(KERN_DEBUG "wis-tw2804: ignoring command %08x until "
"channel number is set\n", cmd);
return 0;
}
switch (cmd) {
case VIDIOC_S_STD:
{
v4l2_std_id *input = arg;
u8 regs[] = {
0x01, *input & V4L2_STD_NTSC ? 0xc4 : 0x84,
0x09, *input & V4L2_STD_NTSC ? 0x07 : 0x04,
0x0a, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
0x0b, *input & V4L2_STD_NTSC ? 0x07 : 0x04,
0x0c, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
0x0d, *input & V4L2_STD_NTSC ? 0x40 : 0x4a,
0x16, *input & V4L2_STD_NTSC ? 0x00 : 0x40,
0x17, *input & V4L2_STD_NTSC ? 0x00 : 0x40,
0x20, *input & V4L2_STD_NTSC ? 0x07 : 0x0f,
0x21, *input & V4L2_STD_NTSC ? 0x07 : 0x0f,
0xff, 0xff,
};
write_regs(client, regs, dec->channel);
dec->norm = *input;
break;
}
case VIDIOC_QUERYCTRL:
{
struct v4l2_queryctrl *ctrl = arg;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
ctrl->minimum = 0;
ctrl->maximum = 255;
ctrl->step = 1;
ctrl->default_value = 128;
ctrl->flags = 0;
break;
case V4L2_CID_CONTRAST:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
ctrl->minimum = 0;
ctrl->maximum = 255;
ctrl->step = 1;
ctrl->default_value = 128;
ctrl->flags = 0;
break;
case V4L2_CID_SATURATION:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
ctrl->minimum = 0;
ctrl->maximum = 255;
ctrl->step = 1;
ctrl->default_value = 128;
ctrl->flags = 0;
break;
case V4L2_CID_HUE:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
ctrl->minimum = 0;
ctrl->maximum = 255;
ctrl->step = 1;
ctrl->default_value = 128;
ctrl->flags = 0;
break;
}
break;
}
case VIDIOC_S_CTRL:
{
struct v4l2_control *ctrl = arg;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
if (ctrl->value > 255)
dec->brightness = 255;
else if (ctrl->value < 0)
dec->brightness = 0;
else
dec->brightness = ctrl->value;
write_reg(client, 0x12, dec->brightness, dec->channel);
break;
case V4L2_CID_CONTRAST:
if (ctrl->value > 255)
dec->contrast = 255;
else if (ctrl->value < 0)
dec->contrast = 0;
else
dec->contrast = ctrl->value;
write_reg(client, 0x11, dec->contrast, dec->channel);
break;
case V4L2_CID_SATURATION:
if (ctrl->value > 255)
dec->saturation = 255;
else if (ctrl->value < 0)
dec->saturation = 0;
else
dec->saturation = ctrl->value;
write_reg(client, 0x10, dec->saturation, dec->channel);
break;
case V4L2_CID_HUE:
if (ctrl->value > 255)
dec->hue = 255;
else if (ctrl->value < 0)
dec->hue = 0;
else
dec->hue = ctrl->value;
write_reg(client, 0x0f, dec->hue, dec->channel);
break;
}
break;
}
case VIDIOC_G_CTRL:
{
struct v4l2_control *ctrl = arg;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
ctrl->value = dec->brightness;
break;
case V4L2_CID_CONTRAST:
ctrl->value = dec->contrast;
break;
case V4L2_CID_SATURATION:
ctrl->value = dec->saturation;
break;
case V4L2_CID_HUE:
ctrl->value = dec->hue;
break;
}
break;
}
default:
break;
}
return 0;
}
static int wis_tw2804_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
struct wis_tw2804 *dec;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
dec = kmalloc(sizeof(struct wis_tw2804), GFP_KERNEL);
if (dec == NULL)
return -ENOMEM;
dec->channel = -1;
dec->norm = V4L2_STD_NTSC;
dec->brightness = 128;
dec->contrast = 128;
dec->saturation = 128;
dec->hue = 128;
i2c_set_clientdata(client, dec);
printk(KERN_DEBUG "wis-tw2804: creating TW2804 at address %d on %s\n",
client->addr, adapter->name);
return 0;
}
static int wis_tw2804_remove(struct i2c_client *client)
{
struct wis_tw2804 *dec = i2c_get_clientdata(client);
kfree(dec);
return 0;
}
static const struct i2c_device_id wis_tw2804_id[] = {
{ "wis_tw2804", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wis_tw2804_id);
static struct i2c_driver wis_tw2804_driver = {
.driver = {
.name = "WIS TW2804 I2C driver",
},
.probe = wis_tw2804_probe,
.remove = wis_tw2804_remove,
.command = wis_tw2804_command,
.id_table = wis_tw2804_id,
};
static int __init wis_tw2804_init(void)
{
return i2c_add_driver(&wis_tw2804_driver);
}
static void __exit wis_tw2804_cleanup(void)
{
i2c_del_driver(&wis_tw2804_driver);
}
module_init(wis_tw2804_init);
module_exit(wis_tw2804_cleanup);
MODULE_LICENSE("GPL v2");