| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * Tuner "middleware" for Philips TEA5767 chip |
| * |
| * Copyright (C) 2004 Jörg Hohensohn |
| * |
| * All files in this archive are subject to the GNU General Public License. |
| * See the file COPYING in the source tree root for full license agreement. |
| * |
| * 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_i2c.h" /* physical interface driver */ |
| |
| #define I2C_ADR 0xC0 |
| static unsigned char write_bytes[5]; |
| |
| /* tuner abstraction layer: set something to the tuner */ |
| void philips_set(int setting, int value) |
| { |
| switch(setting) |
| { |
| case RADIO_SLEEP: |
| /* init values */ |
| write_bytes[0] = 0x80; /* mute */ |
| write_bytes[1] = 0x00; |
| write_bytes[2] = 0x10; |
| #if CONFIG_TUNER_XTAL == 32768000 |
| write_bytes[3] = 0x1A; /* 32.768MHz, soft mute, |
| stereo noise cancelling */ |
| #else |
| write_bytes[3] = 0x0A; /* soft mute, stereo noise cancelling */ |
| #endif |
| write_bytes[4] = 0x00; |
| if (value) /* sleep */ |
| { |
| write_bytes[3] |= 0x40; /* standby mode */ |
| } |
| break; |
| |
| case RADIO_FREQUENCY: |
| { |
| int n; |
| #if CONFIG_TUNER_XTAL == 32768000 |
| n = (4 * (value + 225000)) / 32768; |
| #else |
| n = (4 * (value + 225000)) / 50000; |
| #endif |
| write_bytes[0] = (write_bytes[0] & 0xC0) | (n >> 8); |
| write_bytes[1] = n & 0xFF; |
| } |
| break; |
| |
| case RADIO_MUTE: |
| write_bytes[0] = (write_bytes[0] & 0x7F) | (value ? 0x80 : 0); |
| break; |
| |
| case RADIO_FORCE_MONO: |
| write_bytes[2] = (write_bytes[2] & 0xF7) | (value ? 0x08 : 0); |
| fmradio_i2c_write(I2C_ADR, write_bytes, sizeof(write_bytes)); |
| break; |
| |
| default: |
| return; |
| } |
| fmradio_i2c_write(I2C_ADR, write_bytes, sizeof(write_bytes)); |
| } |
| |
| /* tuner abstraction layer: read something from the tuner */ |
| int philips_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; |
| |
| case RADIO_ALL: /* debug query */ |
| val = read_bytes[0] << 24 |
| | read_bytes[1] << 16 |
| | read_bytes[2] << 8 |
| | read_bytes[3]; |
| break; |
| } |
| return val; |
| } |