swh:1:snp:c3bf2749e3476071fa748f67b0ffa2fdc5fe49d9
Tip revision: 76be97c1fc945db08aae1f1b746012662d643e97 authored by Linus Torvalds on 23 August 2010, 00:43:29 UTC
Linux 2.6.36-rc2
Linux 2.6.36-rc2
Tip revision: 76be97c
wis-saa7115.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.
*
* 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_saa7115 {
int norm;
int brightness;
int contrast;
int saturation;
int hue;
};
static u8 initial_registers[] =
{
0x01, 0x08,
0x02, 0xc0,
0x03, 0x20,
0x04, 0x80,
0x05, 0x80,
0x06, 0xeb,
0x07, 0xe0,
0x08, 0xf0, /* always toggle FID */
0x09, 0x40,
0x0a, 0x80,
0x0b, 0x40,
0x0c, 0x40,
0x0d, 0x00,
0x0e, 0x03,
0x0f, 0x2a,
0x10, 0x0e,
0x11, 0x00,
0x12, 0x8d,
0x13, 0x00,
0x14, 0x00,
0x15, 0x11,
0x16, 0x01,
0x17, 0xda,
0x18, 0x40,
0x19, 0x80,
0x1a, 0x00,
0x1b, 0x42,
0x1c, 0xa9,
0x30, 0x66,
0x31, 0x90,
0x32, 0x01,
0x34, 0x00,
0x35, 0x00,
0x36, 0x20,
0x38, 0x03,
0x39, 0x20,
0x3a, 0x88,
0x40, 0x00,
0x41, 0xff,
0x42, 0xff,
0x43, 0xff,
0x44, 0xff,
0x45, 0xff,
0x46, 0xff,
0x47, 0xff,
0x48, 0xff,
0x49, 0xff,
0x4a, 0xff,
0x4b, 0xff,
0x4c, 0xff,
0x4d, 0xff,
0x4e, 0xff,
0x4f, 0xff,
0x50, 0xff,
0x51, 0xff,
0x52, 0xff,
0x53, 0xff,
0x54, 0xf4 /*0xff*/,
0x55, 0xff,
0x56, 0xff,
0x57, 0xff,
0x58, 0x40,
0x59, 0x47,
0x5a, 0x06 /*0x03*/,
0x5b, 0x83,
0x5d, 0x06,
0x5e, 0x00,
0x80, 0x30, /* window defined scaler operation, task A and B enabled */
0x81, 0x03, /* use scaler datapath generated V */
0x83, 0x00,
0x84, 0x00,
0x85, 0x00,
0x86, 0x45,
0x87, 0x31,
0x88, 0xc0,
0x90, 0x02, /* task A process top field */
0x91, 0x08,
0x92, 0x09,
0x93, 0x80,
0x94, 0x06,
0x95, 0x00,
0x96, 0xc0,
0x97, 0x02,
0x98, 0x12,
0x99, 0x00,
0x9a, 0xf2,
0x9b, 0x00,
0x9c, 0xd0,
0x9d, 0x02,
0x9e, 0xf2,
0x9f, 0x00,
0xa0, 0x01,
0xa1, 0x01,
0xa2, 0x01,
0xa4, 0x80,
0xa5, 0x40,
0xa6, 0x40,
0xa8, 0x00,
0xa9, 0x04,
0xaa, 0x00,
0xac, 0x00,
0xad, 0x02,
0xae, 0x00,
0xb0, 0x00,
0xb1, 0x04,
0xb2, 0x00,
0xb3, 0x04,
0xb4, 0x00,
0xb8, 0x00,
0xbc, 0x00,
0xc0, 0x03, /* task B process bottom field */
0xc1, 0x08,
0xc2, 0x09,
0xc3, 0x80,
0xc4, 0x06,
0xc5, 0x00,
0xc6, 0xc0,
0xc7, 0x02,
0xc8, 0x12,
0xc9, 0x00,
0xca, 0xf2,
0xcb, 0x00,
0xcc, 0xd0,
0xcd, 0x02,
0xce, 0xf2,
0xcf, 0x00,
0xd0, 0x01,
0xd1, 0x01,
0xd2, 0x01,
0xd4, 0x80,
0xd5, 0x40,
0xd6, 0x40,
0xd8, 0x00,
0xd9, 0x04,
0xda, 0x00,
0xdc, 0x00,
0xdd, 0x02,
0xde, 0x00,
0xe0, 0x00,
0xe1, 0x04,
0xe2, 0x00,
0xe3, 0x04,
0xe4, 0x00,
0xe8, 0x00,
0x88, 0xf0, /* End of original static list */
0x00, 0x00, /* Terminator (reg 0x00 is read-only) */
};
static int write_reg(struct i2c_client *client, u8 reg, u8 value)
{
return i2c_smbus_write_byte_data(client, reg, value);
}
static int write_regs(struct i2c_client *client, u8 *regs)
{
int i;
for (i = 0; regs[i] != 0x00; i += 2)
if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0)
return -1;
return 0;
}
static int wis_saa7115_command(struct i2c_client *client,
unsigned int cmd, void *arg)
{
struct wis_saa7115 *dec = i2c_get_clientdata(client);
switch (cmd) {
case VIDIOC_S_INPUT:
{
int *input = arg;
i2c_smbus_write_byte_data(client, 0x02, 0xC0 | *input);
i2c_smbus_write_byte_data(client, 0x09,
*input < 6 ? 0x40 : 0xC0);
break;
}
case DECODER_SET_RESOLUTION:
{
struct video_decoder_resolution *res = arg;
/* Course-grained scaler */
int h_integer_scaler = res->width < 704 ? 704 / res->width : 1;
/* Fine-grained scaler to take care of remainder */
int h_scaling_increment = (704 / h_integer_scaler) *
1024 / res->width;
/* Fine-grained scaler only */
int v_scaling_increment = (dec->norm & V4L2_STD_NTSC ?
240 : 288) * 1024 / res->height;
u8 regs[] = {
0x88, 0xc0,
0x9c, res->width & 0xff,
0x9d, res->width >> 8,
0x9e, res->height & 0xff,
0x9f, res->height >> 8,
0xa0, h_integer_scaler,
0xa1, 1,
0xa2, 1,
0xa8, h_scaling_increment & 0xff,
0xa9, h_scaling_increment >> 8,
0xac, (h_scaling_increment / 2) & 0xff,
0xad, (h_scaling_increment / 2) >> 8,
0xb0, v_scaling_increment & 0xff,
0xb1, v_scaling_increment >> 8,
0xb2, v_scaling_increment & 0xff,
0xb3, v_scaling_increment >> 8,
0xcc, res->width & 0xff,
0xcd, res->width >> 8,
0xce, res->height & 0xff,
0xcf, res->height >> 8,
0xd0, h_integer_scaler,
0xd1, 1,
0xd2, 1,
0xd8, h_scaling_increment & 0xff,
0xd9, h_scaling_increment >> 8,
0xdc, (h_scaling_increment / 2) & 0xff,
0xdd, (h_scaling_increment / 2) >> 8,
0xe0, v_scaling_increment & 0xff,
0xe1, v_scaling_increment >> 8,
0xe2, v_scaling_increment & 0xff,
0xe3, v_scaling_increment >> 8,
0x88, 0xf0,
0, 0,
};
write_regs(client, regs);
break;
}
case VIDIOC_S_STD:
{
v4l2_std_id *input = arg;
u8 regs[] = {
0x88, 0xc0,
0x98, *input & V4L2_STD_NTSC ? 0x12 : 0x16,
0x9a, *input & V4L2_STD_NTSC ? 0xf2 : 0x20,
0x9b, *input & V4L2_STD_NTSC ? 0x00 : 0x01,
0xc8, *input & V4L2_STD_NTSC ? 0x12 : 0x16,
0xca, *input & V4L2_STD_NTSC ? 0xf2 : 0x20,
0xcb, *input & V4L2_STD_NTSC ? 0x00 : 0x01,
0x88, 0xf0,
0x30, *input & V4L2_STD_NTSC ? 0x66 : 0x00,
0x31, *input & V4L2_STD_NTSC ? 0x90 : 0xe0,
0, 0,
};
write_regs(client, regs);
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 = 127;
ctrl->step = 1;
ctrl->default_value = 64;
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 = 127;
ctrl->step = 1;
ctrl->default_value = 64;
ctrl->flags = 0;
break;
case V4L2_CID_HUE:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
ctrl->minimum = -128;
ctrl->maximum = 127;
ctrl->step = 1;
ctrl->default_value = 0;
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, 0x0a, dec->brightness);
break;
case V4L2_CID_CONTRAST:
if (ctrl->value > 127)
dec->contrast = 127;
else if (ctrl->value < 0)
dec->contrast = 0;
else
dec->contrast = ctrl->value;
write_reg(client, 0x0b, dec->contrast);
break;
case V4L2_CID_SATURATION:
if (ctrl->value > 127)
dec->saturation = 127;
else if (ctrl->value < 0)
dec->saturation = 0;
else
dec->saturation = ctrl->value;
write_reg(client, 0x0c, dec->saturation);
break;
case V4L2_CID_HUE:
if (ctrl->value > 127)
dec->hue = 127;
else if (ctrl->value < -128)
dec->hue = -128;
else
dec->hue = ctrl->value;
write_reg(client, 0x0d, dec->hue);
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_saa7115_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
struct wis_saa7115 *dec;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
dec = kmalloc(sizeof(struct wis_saa7115), GFP_KERNEL);
if (dec == NULL)
return -ENOMEM;
dec->norm = V4L2_STD_NTSC;
dec->brightness = 128;
dec->contrast = 64;
dec->saturation = 64;
dec->hue = 0;
i2c_set_clientdata(client, dec);
printk(KERN_DEBUG
"wis-saa7115: initializing SAA7115 at address %d on %s\n",
client->addr, adapter->name);
if (write_regs(client, initial_registers) < 0) {
printk(KERN_ERR
"wis-saa7115: error initializing SAA7115\n");
kfree(dec);
return -ENODEV;
}
return 0;
}
static int wis_saa7115_remove(struct i2c_client *client)
{
struct wis_saa7115 *dec = i2c_get_clientdata(client);
kfree(dec);
return 0;
}
static const struct i2c_device_id wis_saa7115_id[] = {
{ "wis_saa7115", 0 },
{ }
};
static struct i2c_driver wis_saa7115_driver = {
.driver = {
.name = "WIS SAA7115 I2C driver",
},
.probe = wis_saa7115_probe,
.remove = wis_saa7115_remove,
.command = wis_saa7115_command,
.id_table = wis_saa7115_id,
};
static int __init wis_saa7115_init(void)
{
return i2c_add_driver(&wis_saa7115_driver);
}
static void __exit wis_saa7115_cleanup(void)
{
i2c_del_driver(&wis_saa7115_driver);
}
module_init(wis_saa7115_init);
module_exit(wis_saa7115_cleanup);
MODULE_LICENSE("GPL v2");