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/*
saa7110 - Philips SAA7110(A) video decoder driver
Copyright (C) 1998 Pauline Middelink <middelin@polyware.nl>
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/types.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/i2c-old.h>
#include <linux/videodev.h>
#include "linux/video_decoder.h"
#define DEBUG(x...) /* remove when no long debugging */
#define SAA7110_MAX_INPUT 9 /* 6 CVBS, 3 SVHS */
#define SAA7110_MAX_OUTPUT 0 /* its a decoder only */
#define I2C_SAA7110 0x9C /* or 0x9E */
#define I2C_DELAY 10 /* 10 us or 100khz */
struct saa7110 {
struct i2c_bus *bus;
int addr;
unsigned char reg[36];
int norm;
int input;
int enable;
int bright;
int contrast;
int hue;
int sat;
};
/* ----------------------------------------------------------------------- */
/* I2C support functions */
/* ----------------------------------------------------------------------- */
static
int saa7110_write(struct saa7110 *decoder, unsigned char subaddr, unsigned char data)
{
int ack;
LOCK_I2C_BUS(decoder->bus);
i2c_start(decoder->bus);
i2c_sendbyte(decoder->bus, decoder->addr, I2C_DELAY);
i2c_sendbyte(decoder->bus, subaddr, I2C_DELAY);
ack = i2c_sendbyte(decoder->bus, data, I2C_DELAY);
i2c_stop(decoder->bus);
decoder->reg[subaddr] = data;
UNLOCK_I2C_BUS(decoder->bus);
return ack;
}
static
int saa7110_write_block(struct saa7110* decoder, unsigned const char *data, unsigned int len)
{
unsigned subaddr = *data;
LOCK_I2C_BUS(decoder->bus);
i2c_start(decoder->bus);
i2c_sendbyte(decoder->bus,decoder->addr,I2C_DELAY);
while (len-- > 0) {
if (i2c_sendbyte(decoder->bus,*data,0)) {
i2c_stop(decoder->bus);
UNLOCK_I2C_BUS(decoder->bus);
return -EAGAIN;
}
decoder->reg[subaddr++] = *data++;
}
i2c_stop(decoder->bus);
UNLOCK_I2C_BUS(decoder->bus);
return 0;
}
static
int saa7110_read(struct saa7110* decoder)
{
int data;
LOCK_I2C_BUS(decoder->bus);
i2c_start(decoder->bus);
i2c_sendbyte(decoder->bus, decoder->addr, I2C_DELAY);
i2c_start(decoder->bus);
i2c_sendbyte(decoder->bus, decoder->addr | 1, I2C_DELAY);
data = i2c_readbyte(decoder->bus, 1);
i2c_stop(decoder->bus);
UNLOCK_I2C_BUS(decoder->bus);
return data;
}
/* ----------------------------------------------------------------------- */
/* SAA7110 functions */
/* ----------------------------------------------------------------------- */
static
int saa7110_selmux(struct i2c_device *device, int chan)
{
static const unsigned char modes[9][8] = {
/* mode 0 */ { 0x00, 0xD9, 0x17, 0x40, 0x03, 0x44, 0x75, 0x16 },
/* mode 1 */ { 0x00, 0xD8, 0x17, 0x40, 0x03, 0x44, 0x75, 0x16 },
/* mode 2 */ { 0x00, 0xBA, 0x07, 0x91, 0x03, 0x60, 0xB5, 0x05 },
/* mode 3 */ { 0x00, 0xB8, 0x07, 0x91, 0x03, 0x60, 0xB5, 0x05 },
/* mode 4 */ { 0x00, 0x7C, 0x07, 0xD2, 0x83, 0x60, 0xB5, 0x03 },
/* mode 5 */ { 0x00, 0x78, 0x07, 0xD2, 0x83, 0x60, 0xB5, 0x03 },
/* mode 6 */ { 0x80, 0x59, 0x17, 0x42, 0xA3, 0x44, 0x75, 0x12 },
/* mode 7 */ { 0x80, 0x9A, 0x17, 0xB1, 0x13, 0x60, 0xB5, 0x14 },
/* mode 8 */ { 0x80, 0x3C, 0x27, 0xC1, 0x23, 0x44, 0x75, 0x21 } };
struct saa7110* decoder = device->data;
const unsigned char* ptr = modes[chan];
saa7110_write(decoder,0x06,ptr[0]); /* Luminance control */
saa7110_write(decoder,0x20,ptr[1]); /* Analog Control #1 */
saa7110_write(decoder,0x21,ptr[2]); /* Analog Control #2 */
saa7110_write(decoder,0x22,ptr[3]); /* Mixer Control #1 */
saa7110_write(decoder,0x2C,ptr[4]); /* Mixer Control #2 */
saa7110_write(decoder,0x30,ptr[5]); /* ADCs gain control */
saa7110_write(decoder,0x31,ptr[6]); /* Mixer Control #3 */
saa7110_write(decoder,0x21,ptr[7]); /* Analog Control #2 */
return 0;
}
static
int determine_norm(struct i2c_device* dev)
{
struct saa7110* decoder = dev->data;
int status;
/* mode changed, start automatic detection */
status = saa7110_read(decoder);
if ((status & 3) == 0) {
saa7110_write(decoder,0x06,0x80);
if (status & 0x20) {
DEBUG(printk(KERN_INFO "%s: norm=bw60\n",dev->name));
saa7110_write(decoder,0x2E,0x81);
return VIDEO_MODE_NTSC;
}
DEBUG(printk(KERN_INFO "%s: norm=bw50\n",dev->name));
saa7110_write(decoder,0x2E,0x9A);
return VIDEO_MODE_PAL;
}
saa7110_write(decoder,0x06,0x00);
if (status & 0x20) { /* 60Hz */
DEBUG(printk(KERN_INFO "%s: norm=ntsc\n",dev->name));
saa7110_write(decoder,0x0D,0x06);
saa7110_write(decoder,0x11,0x2C);
saa7110_write(decoder,0x2E,0x81);
return VIDEO_MODE_NTSC;
}
/* 50Hz -> PAL/SECAM */
saa7110_write(decoder,0x0D,0x06);
saa7110_write(decoder,0x11,0x59);
saa7110_write(decoder,0x2E,0x9A);
mdelay(150); /* pause 150 ms */
status = saa7110_read(decoder);
if ((status & 0x03) == 0x01) {
DEBUG(printk(KERN_INFO "%s: norm=secam\n",dev->name));
saa7110_write(decoder,0x0D,0x07);
return VIDEO_MODE_SECAM;
}
DEBUG(printk(KERN_INFO "%s: norm=pal\n",dev->name));
return VIDEO_MODE_PAL;
}
static
int saa7110_attach(struct i2c_device *device)
{
static const unsigned char initseq[] = {
0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF0, 0x00, 0x00,
0xF8, 0xF8, 0x60, 0x60, 0x00, 0x06, 0x18, 0x90,
0x00, 0x2C, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
0xF0, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xD9, 0x17, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x81, 0x03,
0x40, 0x75, 0x01, 0x8C, 0x03};
struct saa7110* decoder;
int rv;
device->data = decoder = kmalloc(sizeof(struct saa7110), GFP_KERNEL);
if (device->data == 0)
return -ENOMEM;
MOD_INC_USE_COUNT;
/* clear our private data */
memset(decoder, 0, sizeof(struct saa7110));
strcpy(device->name, "saa7110");
decoder->bus = device->bus;
decoder->addr = device->addr;
decoder->norm = VIDEO_MODE_PAL;
decoder->input = 0;
decoder->enable = 1;
decoder->bright = 32768;
decoder->contrast = 32768;
decoder->hue = 32768;
decoder->sat = 32768;
rv = saa7110_write_block(decoder, initseq, sizeof(initseq));
if (rv < 0)
printk(KERN_ERR "%s_attach: init status %d\n", device->name, rv);
else {
saa7110_write(decoder,0x21,0x16);
saa7110_write(decoder,0x0D,0x04);
DEBUG(printk(KERN_INFO "%s_attach: chip version %x\n", device->name, saa7110_read(decoder)));
saa7110_write(decoder,0x0D,0x06);
}
/* setup and implicit mode 0 select has been performed */
return 0;
}
static
int saa7110_detach(struct i2c_device *device)
{
struct saa7110* decoder = device->data;
DEBUG(printk(KERN_INFO "%s_detach\n",device->name));
/* stop further output */
saa7110_write(decoder,0x0E,0x00);
kfree(device->data);
MOD_DEC_USE_COUNT;
return 0;
}
static
int saa7110_command(struct i2c_device *device, unsigned int cmd, void *arg)
{
struct saa7110* decoder = device->data;
int v;
switch (cmd) {
case DECODER_GET_CAPABILITIES:
{
struct video_decoder_capability *dc = arg;
dc->flags = VIDEO_DECODER_PAL
| VIDEO_DECODER_NTSC
| VIDEO_DECODER_SECAM
| VIDEO_DECODER_AUTO
| VIDEO_DECODER_CCIR;
dc->inputs = SAA7110_MAX_INPUT;
dc->outputs = SAA7110_MAX_OUTPUT;
}
break;
case DECODER_GET_STATUS:
{
struct saa7110* decoder = device->data;
int status;
int res = 0;
status = i2c_read(device->bus,device->addr|1);
if (status & 0x40)
res |= DECODER_STATUS_GOOD;
if (status & 0x03)
res |= DECODER_STATUS_COLOR;
switch (decoder->norm) {
case VIDEO_MODE_NTSC:
res |= DECODER_STATUS_NTSC;
break;
case VIDEO_MODE_PAL:
res |= DECODER_STATUS_PAL;
break;
case VIDEO_MODE_SECAM:
res |= DECODER_STATUS_SECAM;
break;
}
*(int*)arg = res;
}
break;
case DECODER_SET_NORM:
v = *(int*)arg;
if (decoder->norm != v) {
decoder->norm = v;
saa7110_write(decoder, 0x06, 0x00);
switch (v) {
case VIDEO_MODE_NTSC:
saa7110_write(decoder, 0x0D, 0x06);
saa7110_write(decoder, 0x11, 0x2C);
saa7110_write(decoder, 0x30, 0x81);
saa7110_write(decoder, 0x2A, 0xDF);
break;
case VIDEO_MODE_PAL:
saa7110_write(decoder, 0x0D, 0x06);
saa7110_write(decoder, 0x11, 0x59);
saa7110_write(decoder, 0x2E, 0x9A);
break;
case VIDEO_MODE_SECAM:
saa7110_write(decoder, 0x0D, 0x07);
saa7110_write(decoder, 0x11, 0x59);
saa7110_write(decoder, 0x2E, 0x9A);
break;
case VIDEO_MODE_AUTO:
*(int*)arg = determine_norm(device);
break;
default:
return -EPERM;
}
}
break;
case DECODER_SET_INPUT:
v = *(int*)arg;
if (v<0 || v>SAA7110_MAX_INPUT)
return -EINVAL;
if (decoder->input != v) {
decoder->input = v;
saa7110_selmux(device, v);
}
break;
case DECODER_SET_OUTPUT:
v = *(int*)arg;
/* not much choice of outputs */
if (v != 0)
return -EINVAL;
break;
case DECODER_ENABLE_OUTPUT:
v = *(int*)arg;
if (decoder->enable != v) {
decoder->enable = v;
saa7110_write(decoder,0x0E, v ? 0x18 : 0x00);
}
break;
case DECODER_SET_PICTURE:
{
struct video_picture *pic = arg;
if (decoder->bright != pic->brightness) {
/* We want 0 to 255 we get 0-65535 */
decoder->bright = pic->brightness;
saa7110_write(decoder, 0x19, decoder->bright >> 8);
}
if (decoder->contrast != pic->contrast) {
/* We want 0 to 127 we get 0-65535 */
decoder->contrast = pic->contrast;
saa7110_write(decoder, 0x13, decoder->contrast >> 9);
}
if (decoder->sat != pic->colour) {
/* We want 0 to 127 we get 0-65535 */
decoder->sat = pic->colour;
saa7110_write(decoder, 0x12, decoder->sat >> 9);
}
if (decoder->hue != pic->hue) {
/* We want -128 to 127 we get 0-65535 */
decoder->hue = pic->hue;
saa7110_write(decoder, 0x07, (decoder->hue>>8)-128);
}
}
break;
case DECODER_DUMP:
for (v=0; v<34; v+=16) {
int j;
DEBUG(printk(KERN_INFO "%s: %03x\n",device->name,v));
for (j=0; j<16; j++) {
DEBUG(printk(KERN_INFO " %02x",decoder->reg[v+j]));
}
DEBUG(printk(KERN_INFO "\n"));
}
break;
default:
DEBUG(printk(KERN_INFO "unknown saa7110_command??(%d)\n",cmd));
return -EINVAL;
}
return 0;
}
/* ----------------------------------------------------------------------- */
static struct i2c_driver i2c_driver_saa7110 =
{
"saa7110", /* name */
I2C_DRIVERID_VIDEODECODER, /* in i2c.h */
I2C_SAA7110, I2C_SAA7110+1, /* Addr range */
saa7110_attach,
saa7110_detach,
saa7110_command
};
EXPORT_NO_SYMBOLS;
static int saa7110_init(void)
{
return i2c_register_driver(&i2c_driver_saa7110);
}
static void saa7110_exit(void)
{
i2c_unregister_driver(&i2c_driver_saa7110);
}
module_init(saa7110_init);
module_exit(saa7110_exit);
MODULE_LICENSE("GPL");
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