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/*
bt819 - BT819A VideoStream Decoder (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.
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.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/pci.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/videodev.h>
#include <linux/i2c-old.h>
#include <linux/video_decoder.h>
#define DEBUG(x) x /* Debug driver */
/* ----------------------------------------------------------------------- */
struct bt819 {
struct i2c_bus *bus;
int addr;
unsigned char reg[32];
int initialized;
int norm;
int input;
int enable;
int bright;
int contrast;
int hue;
int sat;
};
struct timing {
int hactive;
int hdelay;
int vactive;
int vdelay;
int hscale;
int vscale;
};
struct timing timing_data[] = {
{864 - 24, 2, 623, 1, 0x0504, 0x0000},
{858 - 24, 2, 523, 1, 0x00f8, 0x0000},
// { 858-68, 64, 523, 1, 0x00f8, 0x0000 },
};
#define I2C_BT819 0x8a
#define I2C_DELAY 10
/* ----------------------------------------------------------------------- */
static int bt819_write(struct bt819 *dev, unsigned char subaddr,
unsigned char data)
{
int ack;
LOCK_I2C_BUS(dev->bus);
i2c_start(dev->bus);
i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
i2c_sendbyte(dev->bus, subaddr, I2C_DELAY);
ack = i2c_sendbyte(dev->bus, data, I2C_DELAY);
dev->reg[subaddr] = data;
i2c_stop(dev->bus);
UNLOCK_I2C_BUS(dev->bus);
return ack;
}
static int bt819_setbit(struct bt819 *dev, int subaddr, int bit, int data)
{
return bt819_write(dev, subaddr, (dev->reg[subaddr] & ~(1 << bit)) | (data ? (1 << bit) : 0));
}
static int bt819_write_block(struct bt819 *dev, unsigned const char *data,
unsigned int len)
{
int ack;
unsigned subaddr;
ack = 0;
while (len > 1) {
LOCK_I2C_BUS(dev->bus);
i2c_start(dev->bus);
i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
ack = i2c_sendbyte(dev->bus, (subaddr = *data++), I2C_DELAY);
ack = i2c_sendbyte(dev->bus, (dev->reg[subaddr] = *data++),
I2C_DELAY);
len -= 2;
while (len > 1 && *data == ++subaddr) {
data++;
ack =
i2c_sendbyte(dev->bus, (dev->reg[subaddr] = *data++), I2C_DELAY);
len -= 2;
}
i2c_stop(dev->bus);
UNLOCK_I2C_BUS(dev->bus);
}
return ack;
}
static int bt819_read(struct bt819 *dev, unsigned char subaddr)
{
int data;
LOCK_I2C_BUS(dev->bus);
i2c_start(dev->bus);
i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
i2c_sendbyte(dev->bus, subaddr, I2C_DELAY);
i2c_start(dev->bus);
i2c_sendbyte(dev->bus, dev->addr | 1, I2C_DELAY);
data = i2c_readbyte(dev->bus, 1);
i2c_stop(dev->bus);
UNLOCK_I2C_BUS(dev->bus);
return data;
}
static int bt819_init(struct i2c_device *device)
{
struct bt819 *decoder;
static unsigned char init[] = {
//0x1f, 0x00, /* Reset */
0x01, 0x59, /* 0x01 input format */
0x02, 0x00, /* 0x02 temporal decimation */
0x03, 0x12, /* 0x03 Cropping msb */
0x04, 0x16, /* 0x04 Vertical Delay, lsb */
0x05, 0xe0, /* 0x05 Vertical Active lsb */
0x06, 0x80, /* 0x06 Horizontal Delay lsb */
0x07, 0xd0, /* 0x07 Horizontal Active lsb */
0x08, 0x00, /* 0x08 Horizontal Scaling msb */
0x09, 0xf8, /* 0x09 Horizontal Scaling lsb */
0x0a, 0x00, /* 0x0a Brightness control */
0x0b, 0x30, /* 0x0b Miscellaneous control */
0x0c, 0xd8, /* 0x0c Luma Gain lsb */
0x0d, 0xfe, /* 0x0d Chroma Gain (U) lsb */
0x0e, 0xb4, /* 0x0e Chroma Gain (V) msb */
0x0f, 0x00, /* 0x0f Hue control */
0x12, 0x04, /* 0x12 Output Format */
0x13, 0x20, /* 0x13 Vertial Scaling msb 0x60, */
0x14, 0x00, /* 0x14 Vertial Scaling lsb */
0x16, 0x04, /* 0x16 Video Timing Polarity 0x02, */
0x18, 0x68, /* 0x18 AGC Delay */
0x19, 0x5d, /* 0x19 Burst Gate Delay */
0x1a, 0x80, /* 0x1a ADC Interface */
};
struct timing *timing;
decoder = device->data;
timing = &timing_data[decoder->norm];
init[3 * 2 - 1] = (((timing->vdelay >> 8) & 0x03) << 6) |
(((timing->vactive >> 8) & 0x03) << 4) |
(((timing->hdelay >> 8) & 0x03) << 2) |
((timing->hactive >> 8) & 0x03);
init[4 * 2 - 1] = timing->vdelay & 0xff;
init[5 * 2 - 1] = timing->vactive & 0xff;
init[6 * 2 - 1] = timing->hdelay & 0xff;
init[7 * 2 - 1] = timing->hactive & 0xff;
init[8 * 2 - 1] = timing->hscale >> 8;
init[9 * 2 - 1] = timing->hscale & 0xff;
bt819_write(decoder, 0x1f, 0x00);
mdelay(1);
return bt819_write_block(decoder, init, sizeof(init));
}
/* ----------------------------------------------------------------------- */
static int bt819_attach(struct i2c_device *device)
{
int i;
struct bt819 *decoder;
MOD_INC_USE_COUNT;
device->data = decoder = kmalloc(sizeof(struct bt819), GFP_KERNEL);
if (decoder == NULL) {
MOD_DEC_USE_COUNT;
return -ENOMEM;
}
memset(decoder, 0, sizeof(struct bt819));
strcpy(device->name, "bt819");
decoder->bus = device->bus;
decoder->addr = device->addr;
decoder->norm = VIDEO_MODE_NTSC;
decoder->input = 0;
decoder->enable = 1;
decoder->bright = 32768;
decoder->contrast = 32768;
decoder->hue = 32768;
decoder->sat = 32768;
decoder->initialized = 0;
i = bt819_init(device);
if (i < 0) {
printk(KERN_ERR "%s: bt819_attach: init status %d\n",
decoder->bus->name, i);
} else {
printk(KERN_INFO "%s: bt819_attach: chip version %x\n",
decoder->bus->name, bt819_read(decoder,
0x17) & 0x0f);
}
return 0;
}
static int bt819_detach(struct i2c_device *device)
{
kfree(device->data);
MOD_DEC_USE_COUNT;
return 0;
}
static int bt819_command(struct i2c_device *device, unsigned int cmd, void *arg)
{
int temp;
struct bt819 *decoder = device->data;
//return 0;
if (!decoder->initialized) { // First call to bt819_init could be
bt819_init(device); // without #FRST = 0
decoder->initialized = 1;
}
switch (cmd) {
case DECODER_GET_CAPABILITIES:
{
struct video_decoder_capability *cap = arg;
cap->flags
= VIDEO_DECODER_PAL
| VIDEO_DECODER_NTSC | VIDEO_DECODER_CCIR;
cap->inputs = 8;
cap->outputs = 1;
}
break;
case DECODER_GET_STATUS:
{
int *iarg = arg;
int status;
int res;
status = bt819_read(decoder, 0x00);
res = 0;
if ((status & 0x80)) {
res |= DECODER_STATUS_GOOD;
}
switch (decoder->norm) {
case VIDEO_MODE_NTSC:
res |= DECODER_STATUS_NTSC;
break;
case VIDEO_MODE_PAL:
res |= DECODER_STATUS_PAL;
break;
default:
case VIDEO_MODE_AUTO:
if ((status & 0x10)) {
res |= DECODER_STATUS_PAL;
} else {
res |= DECODER_STATUS_NTSC;
}
break;
}
res |= DECODER_STATUS_COLOR;
*iarg = res;
DEBUG(printk(KERN_INFO "%s-bt819: get status %x\n",
decoder->bus->name, *iarg));
}
break;
case DECODER_SET_NORM:
{
int *iarg = arg;
struct timing *timing;
DEBUG(printk(KERN_INFO "%s-bt819: set norm %x\n",
decoder->bus->name, *iarg));
if (*iarg == VIDEO_MODE_NTSC) {
bt819_setbit(decoder, 0x01, 0, 1);
bt819_setbit(decoder, 0x01, 1, 0);
bt819_write(decoder, 0x18, 0x68);
bt819_write(decoder, 0x19, 0x5d);
//bt819_setbit(decoder, 0x1a, 5, 1);
timing = &timing_data[VIDEO_MODE_NTSC];
} else {
bt819_setbit(decoder, 0x01, 0, 1);
bt819_setbit(decoder, 0x01, 1, 1);
bt819_write(decoder, 0x18, 0x7f);
bt819_write(decoder, 0x19, 0x72);
//bt819_setbit(decoder, 0x1a, 5, 0);
timing = &timing_data[VIDEO_MODE_PAL];
}
bt819_write(decoder, 0x03,
(((timing->vdelay >> 8) & 0x03) << 6) |
(((timing->
vactive >> 8) & 0x03) << 4) |
(((timing->
hdelay >> 8) & 0x03) << 2) |
((timing->hactive >> 8) & 0x03));
bt819_write(decoder, 0x04, timing->vdelay & 0xff);
bt819_write(decoder, 0x05, timing->vactive & 0xff);
bt819_write(decoder, 0x06, timing->hdelay & 0xff);
bt819_write(decoder, 0x07, timing->hactive & 0xff);
bt819_write(decoder, 0x08, timing->hscale >> 8);
bt819_write(decoder, 0x09, timing->hscale & 0xff);
decoder->norm = *iarg;
}
break;
case DECODER_SET_INPUT:
{
int *iarg = arg;
DEBUG(printk(KERN_INFO "%s-bt819: set input %x\n",
decoder->bus->name, *iarg));
if (*iarg < 0 || *iarg > 7) {
return -EINVAL;
}
if (decoder->input != *iarg) {
decoder->input = *iarg;
/* select mode */
if (decoder->input == 0) {
bt819_setbit(decoder, 0x0b, 6, 0);
bt819_setbit(decoder, 0x1a, 1, 1);
} else {
bt819_setbit(decoder, 0x0b, 6, 1);
bt819_setbit(decoder, 0x1a, 1, 0);
}
}
}
break;
case DECODER_SET_OUTPUT:
{
int *iarg = arg;
DEBUG(printk(KERN_INFO "%s-bt819: set output %x\n",
decoder->bus->name, *iarg));
/* not much choice of outputs */
if (*iarg != 0) {
return -EINVAL;
}
}
break;
case DECODER_ENABLE_OUTPUT:
{
int *iarg = arg;
int enable = (*iarg != 0);
DEBUG(printk
(KERN_INFO "%s-bt819: enable output %x\n",
decoder->bus->name, *iarg));
if (decoder->enable != enable) {
decoder->enable = enable;
if (decoder->enable) {
bt819_setbit(decoder, 0x16, 7, 0);
} else {
bt819_setbit(decoder, 0x16, 7, 1);
}
}
}
break;
case DECODER_SET_PICTURE:
{
struct video_picture *pic = arg;
DEBUG(printk
(KERN_INFO
"%s-bt819: set picture brightness %d contrast %d colour %d\n",
decoder->bus->name, pic->brightness,
pic->contrast, pic->colour));
if (decoder->bright != pic->brightness) {
/* We want -128 to 127 we get 0-65535 */
decoder->bright = pic->brightness;
bt819_write(decoder, 0x0a,
(decoder->bright >> 8) - 128);
}
if (decoder->contrast != pic->contrast) {
/* We want 0 to 511 we get 0-65535 */
decoder->contrast = pic->contrast;
bt819_write(decoder, 0x0c,
(decoder->
contrast >> 7) & 0xff);
bt819_setbit(decoder, 0x0b, 2,
((decoder->
contrast >> 15) & 0x01));
}
if (decoder->sat != pic->colour) {
/* We want 0 to 511 we get 0-65535 */
decoder->sat = pic->colour;
bt819_write(decoder, 0x0d,
(decoder->sat >> 7) & 0xff);
bt819_setbit(decoder, 0x0b, 1,
((decoder->
sat >> 15) & 0x01));
temp = (decoder->sat * 201) / 237;
bt819_write(decoder, 0x0e,
(temp >> 7) & 0xff);
bt819_setbit(decoder, 0x0b, 0,
(temp >> 15) & 0x01);
}
if (decoder->hue != pic->hue) {
/* We want -128 to 127 we get 0-65535 */
decoder->hue = pic->hue;
bt819_write(decoder, 0x0f,
128 - (decoder->hue >> 8));
}
}
break;
default:
return -EINVAL;
}
return 0;
}
/* ----------------------------------------------------------------------- */
static struct i2c_driver i2c_driver_bt819 = {
"bt819", /* name */
I2C_DRIVERID_VIDEODECODER, /* ID */
I2C_BT819, I2C_BT819 + 1,
bt819_attach,
bt819_detach,
bt819_command
};
EXPORT_NO_SYMBOLS;
static int bt819_setup(void)
{
return i2c_register_driver(&i2c_driver_bt819);
}
static void bt819_exit(void)
{
i2c_unregister_driver(&i2c_driver_bt819);
}
module_init(bt819_setup);
module_exit(bt819_exit);
MODULE_LICENSE("GPL");
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