/*
zr36120_i2c.c - Zoran 36120/36125 based framegrabbers
Copyright (C) 1998-1999 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/types.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <linux/video_decoder.h>
#include <asm/uaccess.h>
#include "tuner.h"
#include "zr36120.h"
/* ----------------------------------------------------------------------- */
/* I2C functions */
/* ----------------------------------------------------------------------- */
/* software I2C functions */
#define I2C_DELAY 10
static void i2c_setlines(struct i2c_bus *bus,int ctrl,int data)
{
struct zoran *ztv = (struct zoran*)bus->data;
unsigned int b = 0;
if (data) b |= ztv->card->swapi2c ? ZORAN_I2C_SCL : ZORAN_I2C_SDA;
if (ctrl) b |= ztv->card->swapi2c ? ZORAN_I2C_SDA : ZORAN_I2C_SCL;
zrwrite(b, ZORAN_I2C);
udelay(I2C_DELAY);
}
static int i2c_getdataline(struct i2c_bus *bus)
{
struct zoran *ztv = (struct zoran*)bus->data;
if (ztv->card->swapi2c)
return zrread(ZORAN_I2C) & ZORAN_I2C_SCL;
return zrread(ZORAN_I2C) & ZORAN_I2C_SDA;
}
static
void attach_inform(struct i2c_bus *bus, int id)
{
struct zoran *ztv = (struct zoran*)bus->data;
struct video_decoder_capability dc;
int rv;
switch (id) {
case I2C_DRIVERID_VIDEODECODER:
DEBUG(printk(CARD_INFO "decoder attached\n",CARD));
/* fetch the capabilities of the decoder */
rv = i2c_control_device(&ztv->i2c, I2C_DRIVERID_VIDEODECODER, DECODER_GET_CAPABILITIES, &dc);
if (rv) {
DEBUG(printk(CARD_DEBUG "decoder is not V4L aware!\n",CARD));
break;
}
DEBUG(printk(CARD_DEBUG "capabilities %d %d %d\n",CARD,dc.flags,dc.inputs,dc.outputs));
/* Test if the decoder can de VBI transfers */
if (dc.flags & 16 /*VIDEO_DECODER_VBI*/)
ztv->have_decoder = 2;
else
ztv->have_decoder = 1;
break;
case I2C_DRIVERID_TUNER:
ztv->have_tuner = 1;
DEBUG(printk(CARD_INFO "tuner attached\n",CARD));
if (ztv->tuner_type >= 0)
{
if (i2c_control_device(&ztv->i2c,I2C_DRIVERID_TUNER,TUNER_SET_TYPE,&ztv->tuner_type)<0)
DEBUG(printk(CARD_INFO "attach_inform; tuner won't be set to type %d\n",CARD,ztv->tuner_type));
}
break;
default:
DEBUG(printk(CARD_INFO "attach_inform; unknown device id=%d\n",CARD,id));
break;
}
}
static
void detach_inform(struct i2c_bus *bus, int id)
{
struct zoran *ztv = (struct zoran*)bus->data;
switch (id) {
case I2C_DRIVERID_VIDEODECODER:
ztv->have_decoder = 0;
DEBUG(printk(CARD_INFO "decoder detached\n",CARD));
break;
case I2C_DRIVERID_TUNER:
ztv->have_tuner = 0;
DEBUG(printk(CARD_INFO "tuner detached\n",CARD));
break;
default:
DEBUG(printk(CARD_INFO "detach_inform; unknown device id=%d\n",CARD,id));
break;
}
}
struct i2c_bus zoran_i2c_bus_template =
{
"ZR36120",
I2C_BUSID_ZORAN,
NULL,
SPIN_LOCK_UNLOCKED,
attach_inform,
detach_inform,
i2c_setlines,
i2c_getdataline,
NULL,
NULL
};
