Nyaaori/rockbox
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
rockbox/firmware/drivers/audio/wm8751.c
Michael Sevakis f16912f624 r25940 oops. No, no, no, that wasn't quite right. Must be truthful about the level in decidecibels for subsequent code. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25941 a1c6a512-1295-4272-9138-f99709370657
2010-05-11 04:13:04 +00:00

459 lines
15 KiB
C
Raw Blame History

/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Driver for WM8751 audio codec
*
* Based on code from the ipodlinux project - http://ipodlinux.org/
* Adapted for Rockbox in December 2005
*
* Original file: linux/arch/armnommu/mach-ipod/audio.c
*
* Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
*
* 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 "kernel.h"
#include "wmcodec.h"
#include "audio.h"
#include "audiohw.h"
#include "system.h"
const struct sound_settings_info audiohw_settings[] = {
[SOUND_VOLUME] = {"dB", 0, 1, -74, 6, -25},
#ifdef USE_ADAPTIVE_BASS
[SOUND_BASS] = {"", 0, 1, 0, 15, 0},
#else
[SOUND_BASS] = {"dB", 1, 15, -60, 90, 0},
#endif
[SOUND_TREBLE] = {"dB", 1, 15, -60, 90, 0},
[SOUND_BALANCE] = {"%", 0, 1,-100, 100, 0},
[SOUND_CHANNELS] = {"", 0, 1, 0, 5, 0},
[SOUND_STEREO_WIDTH] = {"%", 0, 5, 0, 250, 100},
};
/* Flags used in combination with settings */
/* use zero crossing to reduce clicks during volume changes */
#define LOUT1_BITS (LOUT1_LO1ZC)
/* latch left volume first then update left+right together */
#define ROUT1_BITS (ROUT1_RO1ZC | ROUT1_RO1VU)
#define LOUT2_BITS (LOUT2_LO2ZC)
#define ROUT2_BITS (ROUT2_RO2ZC | ROUT2_RO2VU)
/* We use linear bass control with 200 Hz cutoff */
#ifdef USE_ADAPTIVE_BASE
#define BASSCTRL_BITS (BASSCTRL_BC | BASSCTRL_BB)
#else
#define BASSCTRL_BITS (BASSCTRL_BC)
#endif
/* We use linear treble control with 4 kHz cutoff */
#define TREBCTRL_BITS (TREBCTRL_TC)
static int prescaler = 0;
/* convert tenth of dB volume (-730..60) to master volume register value */
int tenthdb2master(int db)
{
/* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
/* 1111111 == +6dB (0x7f) */
/* 1111001 == 0dB (0x79) */
/* 0110000 == -73dB (0x30) */
/* 0101111..0000000 == mute (<= 0x2f) */
if (db < VOLUME_MIN)
return 0x0;
else
return (db / 10) + 73 + 0x30;
}
static int tone_tenthdb2hw(int value)
{
/* -6.0db..+0db..+9.0db step 1.5db - translate -60..+0..+90 step 15
to 10..6..0 step -1.
*/
value = 10 - (value + 60) / 15;
if (value == 6)
value = 0xf; /* 0db -> off */
return value;
}
#ifdef USE_ADAPTIVE_BASS
static int adaptivebass2hw(int value)
{
/* 0 to 15 step 1 - step -1 0 = off is a 15 in the register */
value = 15 - value;
return value;
}
#endif
#if defined(HAVE_WM8750)
static int recvol2hw(int value)
{
/* convert tenth of dB of input volume (-172...300) to input register value */
/* +30dB to -17.25 0.75dB step 6 bits */
/* 111111 == +30dB (0x3f) */
/* 010111 == 0dB (0x17) */
/* 000000 == -17.25dB */
return (3*(value/10 - 0x17))/4;
}
#endif
static void audiohw_mute(bool mute)
{
/* Mute: Set DACMU = 1 to soft-mute the audio DACs. */
/* Unmute: Set DACMU = 0 to soft-un-mute the audio DACs. */
wmcodec_write(DACCTRL, mute ? DACCTRL_DACMU : 0);
}
/* Reset and power up the WM8751 */
void audiohw_preinit(void)
{
#ifdef MROBE_100
/* controls headphone ouput */
GPIOL_ENABLE |= 0x10;
GPIOL_OUTPUT_EN |= 0x10;
GPIOL_OUTPUT_VAL |= 0x10; /* disable */
#endif
/*
* 1. Switch on power supplies.
* By default the WM8751 is in Standby Mode, the DAC is
* digitally muted and the Audio Interface, Line outputs
* and Headphone outputs are all OFF (DACMU = 1 Power
* Management registers 1 and 2 are all zeros).
*/
wmcodec_write(RESET, RESET_RESET); /*Reset*/
/* 2. Enable Vmid and VREF. */
wmcodec_write(PWRMGMT1, PWRMGMT1_VREF | PWRMGMT1_VMIDSEL_5K);
#ifdef CODEC_SLAVE
wmcodec_write(AINTFCE,AINTFCE_WL_16|AINTFCE_FORMAT_I2S);
#else
/* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */
/* IWL=00(16 bit) FORMAT=10(I2S format) */
wmcodec_write(AINTFCE, AINTFCE_MS | AINTFCE_WL_16 |
AINTFCE_FORMAT_I2S);
#endif
/* Set default samplerate */
audiohw_set_frequency(HW_FREQ_DEFAULT);
}
/* Enable DACs and audio output after a short delay */
void audiohw_postinit(void)
{
/* From app notes: allow Vref to stabilize to reduce clicks */
sleep(HZ);
/* 3. Enable DACs as required. */
wmcodec_write(PWRMGMT2, PWRMGMT2_DACL | PWRMGMT2_DACR);
/* 4. Enable line and / or headphone output buffers as required. */
#if defined(MROBE_100) || defined(MPIO_HD200)
wmcodec_write(PWRMGMT2, PWRMGMT2_DACL | PWRMGMT2_DACR |
PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1);
#else
wmcodec_write(PWRMGMT2, PWRMGMT2_DACL | PWRMGMT2_DACR |
PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1 | PWRMGMT2_LOUT2 |
PWRMGMT2_ROUT2);
#endif
/* Full -0dB on the DACS */
wmcodec_write(LEFTGAIN, 0xff);
wmcodec_write(RIGHTGAIN, RIGHTGAIN_RDVU | 0xff);
wmcodec_write(ADDITIONAL1, ADDITIONAL1_TSDEN | ADDITIONAL1_TOEN |
ADDITIONAL1_DMONOMIX_LLRR | ADDITIONAL1_VSEL_DEFAULT);
wmcodec_write(LEFTMIX1, LEFTMIX1_LD2LO | LEFTMIX1_LI2LO_DEFAULT);
wmcodec_write(RIGHTMIX2, RIGHTMIX2_RD2RO | RIGHTMIX2_RI2RO_DEFAULT);
#ifdef TOSHIBA_GIGABEAT_F
#ifdef HAVE_HARDWARE_BEEP
/* Single-ended mono input */
wmcodec_write(MONOMIX1, 0);
/* Route mono input to both outputs at 0dB */
wmcodec_write(LEFTMIX2, LEFTMIX2_MI2LO | LEFTMIX2_MI2LOVOL(2));
wmcodec_write(RIGHTMIX1, RIGHTMIX1_MI2RO | RIGHTMIX1_MI2ROVOL(2));
#endif
#endif
#ifdef MPIO_HD200
/* Crude fix for high pitch noise at startup
* I should find out what realy causes this
*/
wmcodec_write(LOUT1, LOUT1_BITS|0x7f);
wmcodec_write(ROUT1, ROUT1_BITS|0x7f);
wmcodec_write(LOUT1, LOUT1_BITS);
wmcodec_write(ROUT1, ROUT1_BITS);
#endif
/* lower power consumption */
wmcodec_write(PWRMGMT1, PWRMGMT1_VREF | PWRMGMT1_VMIDSEL_50K);
audiohw_mute(false);
#ifdef MROBE_100
/* enable headphone output */
GPIOL_OUTPUT_VAL &= ~0x10;
GPIOL_OUTPUT_EN |= 0x10;
#endif
}
void audiohw_set_master_vol(int vol_l, int vol_r)
{
/* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
/* 1111111 == +6dB */
/* 1111001 == 0dB */
/* 0110000 == -73dB */
/* 0101111 == mute (0x2f) */
wmcodec_write(LOUT1, LOUT1_BITS | LOUT1_LOUT1VOL(vol_l));
wmcodec_write(ROUT1, ROUT1_BITS | ROUT1_ROUT1VOL(vol_r));
}
#ifndef MROBE_100
void audiohw_set_lineout_vol(int vol_l, int vol_r)
{
wmcodec_write(LOUT2, LOUT2_BITS | LOUT2_LOUT2VOL(vol_l));
wmcodec_write(ROUT2, ROUT2_BITS | ROUT2_ROUT2VOL(vol_r));
}
#endif
void audiohw_set_bass(int value)
{
wmcodec_write(BASSCTRL, BASSCTRL_BITS |
#ifdef USE_ADAPTIVE_BASS
BASSCTRL_BASS(adaptivebass2hw(value)));
#else
BASSCTRL_BASS(tone_tenthdb2hw(value)));
#endif
}
void audiohw_set_treble(int value)
{
wmcodec_write(TREBCTRL, TREBCTRL_BITS |
TREBCTRL_TREB(tone_tenthdb2hw(value)));
}
void audiohw_set_prescaler(int value)
{
prescaler = 3 * value / 15;
wmcodec_write(LEFTGAIN, 0xff - (prescaler & LEFTGAIN_LDACVOL));
wmcodec_write(RIGHTGAIN, RIGHTGAIN_RDVU |
(0xff - (prescaler & RIGHTGAIN_RDACVOL)));
}
/* Nice shutdown of WM8751 codec */
void audiohw_close(void)
{
/* 1. Set DACMU = 1 to soft-mute the audio DACs. */
audiohw_mute(true);
/* 2. Disable all output buffers. */
wmcodec_write(PWRMGMT2, 0x0);
/* 3. Switch off the power supplies. */
wmcodec_write(PWRMGMT1, 0x0);
}
void audiohw_set_frequency(int fsel)
{
(void)fsel;
#ifndef CODEC_SLAVE
static const unsigned char srctrl_table[HW_NUM_FREQ] =
{
HW_HAVE_11_([HW_FREQ_11] = CODEC_SRCTRL_11025HZ,)
HW_HAVE_22_([HW_FREQ_22] = CODEC_SRCTRL_22050HZ,)
HW_HAVE_44_([HW_FREQ_44] = CODEC_SRCTRL_44100HZ,)
HW_HAVE_88_([HW_FREQ_88] = CODEC_SRCTRL_88200HZ,)
};
if ((unsigned)fsel >= HW_NUM_FREQ)
fsel = HW_FREQ_DEFAULT;
wmcodec_write(CLOCKING, srctrl_table[fsel]);
#endif
}
#if defined(HAVE_WM8750)
void audiohw_set_recsrc(int source, bool recording)
{
/* INPUT1 - FM radio
* INPUT2 - Line-in
* INPUT3 - MIC
*
* if recording == false we use analog bypass from input
* turn off ADC, PGA to save power
* turn on output buffer(s)
*
* if recording == true we route input signal to PGA
* and monitoring picks up signal after PGA in analog domain
* turn on ADC, PGA, DAC, output buffer(s)
*/
switch(source)
{
case AUDIO_SRC_PLAYBACK:
/* mute PGA, disable all audio paths but DAC and output stage*/
wmcodec_write(LINVOL, LINVOL_LINMUTE | LINVOL_LINVOL(23)); /* 0dB */
wmcodec_write(RINVOL, RINVOL_RINMUTE | RINVOL_RINVOL(23)); /* 0dB */
wmcodec_write(PWRMGMT1, PWRMGMT1_VREF | PWRMGMT1_VMIDSEL_50K);
wmcodec_write(PWRMGMT2, PWRMGMT2_DACL | PWRMGMT2_DACR |
PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1);
/* route DAC signal to output mixer */
wmcodec_write(LEFTMIX1, LEFTMIX1_LD2LO);
wmcodec_write(RIGHTMIX2, RIGHTMIX2_RD2RO);
/* unmute DAC */
audiohw_mute(false);
break;
case AUDIO_SRC_FMRADIO:
if(recording)
{
/* Set input volume to PGA */
wmcodec_write(LINVOL, LINVOL_LINVOL(23));
wmcodec_write(RINVOL, RINVOL_RINVOL(23));
/* Turn on PGA and ADC */
wmcodec_write(PWRMGMT1, PWRMGMT1_VREF | PWRMGMT1_VMIDSEL_50K |
PWRMGMT1_AINL | PWRMGMT1_AINR |
PWRMGMT1_ADCL | PWRMGMT1_ADCR);
/* Setup input source for PGA as INPUT1
* MICBOOST disabled
*/
wmcodec_write(ADCL, ADCL_LINSEL_LINPUT1 | ADCL_LMICBOOST_DISABLED);
wmcodec_write(ADCR, ADCR_RINSEL_RINPUT1 | ADCR_RMICBOOST_DISABLED);
/* setup output digital data
* default is LADC -> LDATA, RADC -> RDATA
* so we don't touch this
*/
/* power up DAC and output stage */
wmcodec_write(PWRMGMT2, PWRMGMT2_DACL | PWRMGMT2_DACR |
PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1);
/* analog monitor */
wmcodec_write(LEFTMIX1, LEFTMIX1_LMIXSEL_ADCLIN |
LEFTMIX1_LD2LO);
wmcodec_write(RIGHTMIX2, RIGHTMIX2_RMIXSEL_ADCRIN |
RIGHTMIX2_RD2RO);
}
else
{
/* turn off ADC, PGA */
wmcodec_write(PWRMGMT1, PWRMGMT1_VREF | PWRMGMT1_VMIDSEL_50K);
/* turn on DAC and output stage */
wmcodec_write(PWRMGMT2, PWRMGMT2_DACL | PWRMGMT2_DACR |
PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1);
/* setup monitor mode by routing input signal to outmix
* at 0dB volume
*/
wmcodec_write(LEFTMIX1, LEFTMIX1_LI2LO | LEFTMIX1_LMIXSEL_LINPUT1 |
LEFTMIX1_LI2LOVOL(0x20) | LEFTMIX1_LD2LO);
wmcodec_write(RIGHTMIX2, RIGHTMIX2_RI2RO | RIGHTMIX2_RMIXSEL_RINPUT1 |
RIGHTMIX2_RI2ROVOL(0x20) | RIGHTMIX2_RD2RO);
}
break;
case AUDIO_SRC_LINEIN:
/* Set input volume to PGA */
wmcodec_write(LINVOL, LINVOL_LINVOL(23));
wmcodec_write(RINVOL, RINVOL_RINVOL(23));
/* Turn on PGA, ADC, DAC */
wmcodec_write(PWRMGMT1, PWRMGMT1_VREF | PWRMGMT1_VMIDSEL_50K |
PWRMGMT1_AINL | PWRMGMT1_AINR |
PWRMGMT1_ADCL | PWRMGMT1_ADCR);
/* turn on DAC and output stage */
wmcodec_write(PWRMGMT2, PWRMGMT2_DACL | PWRMGMT2_DACR |
PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1);
/* Setup input source for PGA as INPUT2
* MICBOOST disabled
*/
wmcodec_write(ADCL, ADCL_LINSEL_LINPUT2 | ADCL_LMICBOOST_DISABLED);
wmcodec_write(ADCR, ADCR_RINSEL_RINPUT2 | ADCR_RMICBOOST_DISABLED);
/* setup output digital data
* default is LADC -> LDATA, RADC -> RDATA
* so we don't touch this
*/
/* digital monitor */
wmcodec_write(LEFTMIX1, LEFTMIX1_LMIXSEL_ADCLIN |
LEFTMIX1_LD2LO);
wmcodec_write(RIGHTMIX2, RIGHTMIX2_RMIXSEL_ADCRIN |
RIGHTMIX2_RD2RO);
break;
case AUDIO_SRC_MIC:
/* Set input volume to PGA */
wmcodec_write(LINVOL, LINVOL_LINVOL(23));
wmcodec_write(RINVOL, RINVOL_RINVOL(23));
/* Turn on PGA and ADC, turn off DAC */
wmcodec_write(PWRMGMT1, PWRMGMT1_VREF | PWRMGMT1_VMIDSEL_50K |
PWRMGMT1_AINL | PWRMGMT1_AINR |
PWRMGMT1_ADCL | PWRMGMT1_ADCR);
/* turn on DAC and output stage */
wmcodec_write(PWRMGMT2, PWRMGMT2_DACL | PWRMGMT2_DACR |
PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1);
/* Setup input source for PGA as INPUT3
* MICBOOST disabled
*/
wmcodec_write(ADCL, ADCL_LINSEL_LINPUT3 | ADCL_LMICBOOST_DISABLED);
wmcodec_write(ADCR, ADCR_RINSEL_RINPUT3 | ADCR_RMICBOOST_DISABLED);
/* setup output digital data
* default is LADC -> LDATA, RADC -> RDATA
* so we don't touch this
*/
/* analog monitor */
wmcodec_write(LEFTMIX1, LEFTMIX1_LMIXSEL_ADCLIN |
LEFTMIX1_LD2LO);
wmcodec_write(RIGHTMIX2, RIGHTMIX2_RMIXSEL_ADCRIN |
RIGHTMIX2_RD2RO);
break;
} /* switch(source) */
}
/* Setup PGA gain */
void audiohw_set_recvol(int left, int right, int type)
{
(void)type;
wmcodec_write(LINVOL, LINVOL_LINVOL(recvol2hw(left)));
wmcodec_write(RINVOL, RINVOL_RINVOL(recvol2hw(right)));
}
#endif
Reference in a new issue View git blame Copy permalink