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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
* Tuner "middleware" for Philips TEA5767 chip
*
* Copyright (C) 2004 Jörg Hohensohn
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include <stdbool.h>
#include <string.h>
#include <stdlib.h>
#include "kernel.h"
#include "power.h"
#include "tuner.h" /* tuner abstraction interface */
#include "fmradio.h"
#include "fmradio_i2c.h" /* physical interface driver - i2c */
#include "fmradio_3wire.h" /* physical interface driver - 3-wire bus */
#if defined(PHILIPS_HDD1630) || defined(ONDA_VX747) || defined(ONDA_VX777) || defined(PHILIPS_HDD6330)
#define I2C_ADR 0x60
#else
#define I2C_ADR 0xC0
#endif
/* define RSSI range */
#define RSSI_MIN 10
#define RSSI_MAX 55
static bool tuner_present = true;
static unsigned char write_bytes[5] = { 0x00, 0x00, 0x00, 0x00, 0x00 };
static void tea5767_set_clear(int byte, unsigned char bits, int set)
{
write_bytes[byte] &= ~bits;
if (set)
write_bytes[byte] |= bits;
}
/* tuner abstraction layer: set something to the tuner */
int tea5767_set(int setting, int value)
{
switch(setting)
{
case RADIO_SLEEP:
/* init values */
write_bytes[0] |= (1<<7); /* mute */
#if CONFIG_TUNER_XTAL == 32768
/* 32.768kHz, soft mute, stereo noise cancelling */
write_bytes[3] |= (1<<4) | (1<<3) | (1<<1);
#else
/* soft mute, stereo noise cancelling */
write_bytes[3] |= (1<<3) | (1<<1);
#endif
/* sleep / standby mode */
tea5767_set_clear(3, (1<<6), value);
break;
case RADIO_FREQUENCY:
{
int n;
#if CONFIG_TUNER_XTAL == 32768
n = (4 * (value - 225000) + 16384) / 32768;
#else
n = (4 * (value - 225000)) / 50000;
#endif
write_bytes[0] = (write_bytes[0] & 0xC0) | (n >> 8);
write_bytes[1] = n;
}
break;
case RADIO_SCAN_FREQUENCY:
tea5767_set(RADIO_FREQUENCY, value);
sleep(HZ/30);
return tea5767_get(RADIO_TUNED);
case RADIO_MUTE:
tea5767_set_clear(0, 0x80, value);
break;
case RADIO_REGION:
{
const struct fm_region_data *rd = &fm_region_data[value];
int deemphasis = (rd->deemphasis == 75) ? 1 : 0;
int band = (rd->freq_min == 76000000) ? 1 : 0;
tea5767_set_clear(4, (1<<6), deemphasis);
tea5767_set_clear(3, (1<<5), band);
break;
}
case RADIO_FORCE_MONO:
tea5767_set_clear(2, 0x08, value);
break;
default:
return -1;
}
if(setting == RADIO_SLEEP && !value)
tuner_power(true); /* wakeup */
#if defined(CONFIG_TUNER_3WIRE)
fmradio_3wire_write(write_bytes);
#else
fmradio_i2c_write(I2C_ADR, write_bytes, sizeof(write_bytes));
#endif
if(setting == RADIO_SLEEP && value)
tuner_power(false); /* sleep */
return 1;
}
/* tuner abstraction layer: read something from the tuner */
int tea5767_get(int setting)
{
unsigned char read_bytes[5];
int val = -1; /* default for unsupported query */
#if defined(CONFIG_TUNER_3WIRE)
fmradio_3wire_read(read_bytes);
#else
fmradio_i2c_read(I2C_ADR, read_bytes, sizeof(read_bytes));
#endif
switch(setting)
{
case RADIO_PRESENT:
val = tuner_present;
break;
case RADIO_TUNED:
val = 0;
if (read_bytes[0] & 0x80) /* ready */
{
val = read_bytes[2] & 0x7F; /* IF counter */
val = (abs(val - 0x36) < 2); /* close match */
}
break;
case RADIO_STEREO:
val = read_bytes[2] >> 7;
break;
case RADIO_RSSI:
val = 10 + 3*(read_bytes[3] >> 4);
break;
case RADIO_RSSI_MIN:
val = RSSI_MIN;
break;
case RADIO_RSSI_MAX:
val = RSSI_MAX;
break;
}
return val;
}
void tea5767_init(void)
{
/* save binsize by only detecting presence for targets where it may be absent */
#if defined(PHILIPS_HDD1630) || defined(PHILIPS_HDD6330) ||\
defined(SAMSUNG_YH920) || defined(SAMSUNG_YH925)
unsigned char buf[5];
unsigned char chipid;
tuner_power(true);
#if defined(CONFIG_TUNER_3WIRE)
/* We don't have any control over the bus protocol, the only way to detect
presence of the tuner is to write something to it and then read bytes */
tea5767_set(RADIO_MUTE, 1);
int res = fmradio_3wire_read(buf);
res = ((buf[0] == 0) && (buf[1] == 0) && (buf[2] == 0) && (buf[3] == 0)
&& (buf[4] == 0)) ? -1 : 1;
/* clear chipid byte - we don't use it here for detection, so it should be */
/* set to zero, to fulfill the condition in "else" block */
buf[3] = 0;
#else
/* init chipid register with 0xFF in case fmradio_i2c_read fails silently */
buf[3] = 0xFF;
int res = fmradio_i2c_read(I2C_ADR, buf, sizeof(buf));
#endif
if (res < 0) {
/* no device detected on bus */
tuner_present = false;
} else {
/* check chip id */
chipid = buf[3] & 0x0F;
tuner_present = (chipid == 0);
}
tuner_power(false);
#endif
}
void tea5767_dbg_info(struct tea5767_dbg_info *info)
{
#if defined(CONFIG_TUNER_3WIRE)
fmradio_3wire_read(info->read_regs);
#else
fmradio_i2c_read(I2C_ADR, info->read_regs, 5);
#endif
memcpy(info->write_regs, write_bytes, 5);
}
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