802b57ccd7
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19996 a1c6a512-1295-4272-9138-f99709370657
142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* 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 "tuner.h" /* tuner abstraction interface */
|
|
#include "fmradio.h"
|
|
#include "fmradio_i2c.h" /* physical interface driver */
|
|
|
|
#if defined(PHILIPS_HDD1630)
|
|
#define I2C_ADR 0x60
|
|
#else
|
|
#define I2C_ADR 0xC0
|
|
#endif
|
|
|
|
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 tea5767_region_data *rd =
|
|
&tea5767_region_data[value];
|
|
|
|
tea5767_set_clear(4, (1<<6), rd->deemphasis);
|
|
tea5767_set_clear(3, (1<<5), rd->band);
|
|
break;
|
|
}
|
|
case RADIO_FORCE_MONO:
|
|
tea5767_set_clear(2, 0x08, value);
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
fmradio_i2c_write(I2C_ADR, write_bytes, sizeof(write_bytes));
|
|
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 */
|
|
|
|
fmradio_i2c_read(I2C_ADR, read_bytes, sizeof(read_bytes));
|
|
|
|
switch(setting)
|
|
{
|
|
case RADIO_PRESENT:
|
|
val = 1; /* true */
|
|
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;
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
void tea5767_dbg_info(struct tea5767_dbg_info *info)
|
|
{
|
|
fmradio_i2c_read(I2C_ADR, info->read_regs, 5);
|
|
memcpy(info->write_regs, write_bytes, 5);
|
|
}
|