rockbox/firmware/drivers/audio/wm8975.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Driver for WM8975 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 "logf.h"
#include "system.h"
#include "string.h"
#include "audio.h"
#include "sound.h"
#include "wmcodec.h"
#include "audiohw.h"
static unsigned short wm8975_regs[WM8975_NUM_REGISTERS] =
{
[LINVOL] = LINVOL_LZCEN | 23, /* 0dB */
[RINVOL] = RINVOL_RIVU | RINVOL_RZCEN | 23, /* 0dB */
[DAPCTRL] = DAPCTRL_DACMU,
/* This reduces the popping noise during codec powerup
noticably, especially with high-impedance loads.
We might want to change this for all targets,
but it has only been tested on iPod Nano 2G so far. */
#ifdef IPOD_NANO2G
[PWRMGMT1] = PWRMGMT1_VMIDSEL_500K | PWRMGMT1_VREF,
#else
[PWRMGMT1] = PWRMGMT1_VMIDSEL_5K | PWRMGMT1_VREF,
#endif
[PWRMGMT2] = PWRMGMT2_DACL | PWRMGMT2_DACR | PWRMGMT2_LOUT1
| PWRMGMT2_ROUT1 | PWRMGMT2_LOUT2 | PWRMGMT2_ROUT2,
};
static void wm8975_write(int reg, unsigned val)
{
if (WM8975_NUM_REGISTERS > reg) {
wm8975_regs[reg] = val;
wmcodec_write(reg, val);
}
}
static void wm8975_write_and(int reg, unsigned bits)
{
wm8975_write(reg, wm8975_regs[reg] & bits);
}
static void wm8975_write_or(int reg, unsigned bits)
{
wm8975_write(reg, wm8975_regs[reg] | bits);
}
/* convert tenth of dB volume (-730..60) to master volume register value */
static int vol_tenthdb2hw(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 <= -740) {
return 0x0;
} else {
return((db/10)+73+0x30);
}
}
static void audiohw_mute(bool mute)
{
if (mute) {
/* Set DACMU = 1 to soft-mute the audio DACs. */
wm8975_write_or(DAPCTRL, DAPCTRL_DACMU);
} else {
/* Set DACMU = 0 to soft-un-mute the audio DACs. */
wm8975_write_and(DAPCTRL, ~DAPCTRL_DACMU);
}
}
#define IPOD_PCM_LEVEL 0x65 /* -6dB */
/* This reduces the popping noise during codec powerup
noticably, especially with high-impedance loads.
We might want to change this for all targets,
but it has only been tested on iPod Nano 2G so far. */
#ifdef IPOD_NANO2G
void audiohw_preinit(void)
{
wm8975_write(RESET, RESET_RESET);
wm8975_write(AINTFCE, AINTFCE_MS | AINTFCE_LRP_I2S_RLO
| AINTFCE_IWL_16BIT | AINTFCE_FORMAT_I2S);
wm8975_write(LOUTMIX1, LOUTMIX1_LD2LO | LOUTMIX1_LI2LOVOL(5));
wm8975_write(ROUTMIX2, ROUTMIX2_RD2RO | ROUTMIX2_RI2ROVOL(5));
wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1]);
wm8975_write(PWRMGMT2, wm8975_regs[PWRMGMT2]);
}
void audiohw_postinit(void)
{
wm8975_regs[PWRMGMT1] &= ~PWRMGMT1_VMIDSEL_MASK;
wm8975_regs[PWRMGMT1] |= PWRMGMT1_VMIDSEL_50K;
wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1]);
audiohw_mute(false);
}
#else /* !IPOD_NANO2G */
void audiohw_preinit(void)
{
/* POWER UP SEQUENCE */
wm8975_write(RESET, RESET_RESET);
/* 2. Enable Vmid and VREF, quick startup. */
wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1]);
sleep(HZ/50);
wm8975_regs[PWRMGMT1] &= ~PWRMGMT1_VMIDSEL_MASK;
wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1] | PWRMGMT1_VMIDSEL_50K);
/* 4. Enable DACs, line and headphone output buffers as required. */
wm8975_write(PWRMGMT2, wm8975_regs[PWRMGMT2]);
wm8975_write(AINTFCE, AINTFCE_MS | AINTFCE_LRP_I2S_RLO
| AINTFCE_IWL_16BIT | AINTFCE_FORMAT_I2S);
wm8975_write(DAPCTRL, wm8975_regs[DAPCTRL] );
/* Set sample rate. */
wm8975_write(SAMPCTRL, WM8975_44100HZ);
/* set the volume to -6dB */
wm8975_write(LOUT1VOL, LOUT1VOL_LO1ZC | IPOD_PCM_LEVEL);
wm8975_write(ROUT1VOL, ROUT1VOL_RO1VU | ROUT1VOL_RO1ZC | IPOD_PCM_LEVEL);
wm8975_write(LOUTMIX1, LOUTMIX1_LD2LO| LOUTMIX1_LI2LOVOL(5));
wm8975_write(LOUTMIX2, LOUTMIX2_RI2LOVOL(5));
wm8975_write(ROUTMIX1, ROUTMIX1_LI2ROVOL(5));
wm8975_write(ROUTMIX2, ROUTMIX2_RD2RO| ROUTMIX2_RI2ROVOL(5));
wm8975_write(MOUTMIX1, 0);
wm8975_write(MOUTMIX2, 0);
}
void audiohw_postinit(void)
{
audiohw_mute(false);
}
#endif
void audiohw_set_volume(int vol_l, int vol_r)
{
vol_l = vol_tenthdb2hw(vol_l);
vol_r = vol_tenthdb2hw(vol_r);
/* OUT1 */
wm8975_write(LOUT1VOL, LOUT1VOL_LO1ZC | vol_l);
wm8975_write(ROUT1VOL, ROUT1VOL_RO1VU | ROUT1VOL_RO1ZC | vol_r);
}
void audiohw_set_lineout_volume(int vol_l, int vol_r)
{
vol_l = vol_tenthdb2hw(vol_l);
vol_r = vol_tenthdb2hw(vol_r);
/* OUT2 */
wm8975_write(LOUT2VOL, LOUT2VOL_LO2ZC | vol_l);
wm8975_write(ROUT2VOL, ROUT2VOL_RO2VU | ROUT2VOL_RO2ZC | vol_r);
}
void audiohw_enable_lineout(bool enable)
{
if (enable) {
/* Enable lineout */
wm8975_regs[PWRMGMT2] |= (PWRMGMT2_LOUT2 | PWRMGMT2_ROUT2);
} else {
/* Disable lineout */
wm8975_regs[PWRMGMT2] &= ~(PWRMGMT2_LOUT2 | PWRMGMT2_ROUT2);
}
wm8975_write(PWRMGMT2, wm8975_regs[PWRMGMT2]);
}
void audiohw_set_bass(int value)
{
const int regvalues[] = {
11, 10, 10, 9, 8, 8, 0xf, 6, 6, 5, 4, 4, 3, 2, 2, 1
};
if ((value >= -6) && (value <= 9)) {
/* We use linear bass control with 200 Hz cutoff */
wm8975_write(BASSCTRL, regvalues[value + 6] | BASSCTRL_BC);
}
}
void audiohw_set_treble(int value)
{
const int regvalues[] = {
11, 10, 10, 9, 8, 8, 0xf, 6, 6, 5, 4, 4, 3, 2, 2, 1
};
if ((value >= -6) && (value <= 9)) {
/* We use linear treble control with 4 kHz cutoff */
wm8975_write(TREBCTRL, regvalues[value + 6] | TREBCTRL_TC);
}
}
/* Nice shutdown of WM8975 codec */
void audiohw_close(void)
{
audiohw_mute(true);
/* 2. Disable all output buffers. */
wm8975_write(PWRMGMT2, 0x0);
/* 3. Switch off the power supplies. */
wm8975_write(PWRMGMT1, 0x0);
}
/* Note: Disable output before calling this function */
void audiohw_set_frequency(int fsel)
{
(void)fsel;
}
#ifdef HAVE_RECORDING
void audiohw_enable_recording(bool source_mic)
{
wm8975_regs[PWRMGMT1] |= PWRMGMT1_AINL | PWRMGMT1_AINR
| PWRMGMT1_ADCL | PWRMGMT1_ADCR;
wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1]);
/* NOTE: When switching to digital monitoring we will not want
* the DACs disabled. Also the outputs shouldn't be disabled
* when recording from line in (dock connector) - needs testing. */
wm8975_regs[PWRMGMT2] &= ~(PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1
| PWRMGMT2_LOUT2 | PWRMGMT2_ROUT2);
wm8975_write(PWRMGMT2, wm8975_regs[PWRMGMT2]);
wm8975_write_or(LINVOL, LINVOL_LINMUTE);
wm8975_write_or(RINVOL, RINVOL_RINMUTE);
wm8975_write(ADDCTRL3, ADDCTRL3_VROI);
if (source_mic) {
wm8975_write(ADDCTRL1, ADDCTRL1_VSEL_LOWBIAS | ADDCTRL1_DATSEL_RADC
| ADDCTRL1_TOEN);
wm8975_write(ADCLPATH, 0);
wm8975_write(ADCRPATH, ADCRPATH_RINSEL_RIN2 | ADCRPATH_RMICBOOST_20dB);
} else {
wm8975_write(ADDCTRL1, ADDCTRL1_VSEL_LOWBIAS | ADDCTRL1_DATSEL_NORMAL
| ADDCTRL1_TOEN);
wm8975_write(ADCLPATH, ADCLPATH_LINSEL_LIN1 | ADCLPATH_LMICBOOST_OFF);
wm8975_write(ADCRPATH, ADCRPATH_RINSEL_RIN1 | ADCRPATH_RMICBOOST_OFF);
}
wm8975_write_and(LINVOL, ~LINVOL_LINMUTE);
wm8975_write_and(RINVOL, ~RINVOL_RINMUTE);
}
void audiohw_disable_recording(void)
{
/* mute inputs */
wm8975_write_or(LINVOL, LINVOL_LINMUTE);
wm8975_write_or(RINVOL, RINVOL_RINMUTE);
wm8975_write(ADDCTRL3, 0);
wm8975_regs[PWRMGMT2] |= PWRMGMT2_DACL | PWRMGMT2_DACR
| PWRMGMT2_LOUT1 | PWRMGMT2_ROUT1
| PWRMGMT2_LOUT2 | PWRMGMT2_ROUT2;
wm8975_write(PWRMGMT2, wm8975_regs[PWRMGMT2]);
wm8975_regs[PWRMGMT1] &= ~(PWRMGMT1_AINL | PWRMGMT1_AINR
| PWRMGMT1_ADCL | PWRMGMT1_ADCR);
wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1]);
}
void audiohw_set_recvol(int left, int right, int type)
{
switch (type)
{
case AUDIO_GAIN_MIC: /* Mic uses right ADC */
wm8975_regs[RINVOL] &= ~RINVOL_MASK;
wm8975_write_or(RINVOL, left & RINVOL_MASK);
break;
case AUDIO_GAIN_LINEIN:
wm8975_regs[LINVOL] &= ~LINVOL_MASK;
wm8975_write_or(LINVOL, left & LINVOL_MASK);
wm8975_regs[RINVOL] &= ~RINVOL_MASK;
wm8975_write_or(RINVOL, right & RINVOL_MASK);
break;
default:
return;
}
}
void audiohw_set_monitor(bool enable)
{
if (enable) {
/* set volume to 0 dB */
wm8975_regs[LOUTMIX1] &= ~LOUTMIX1_LI2LOVOL_MASK;
wm8975_regs[LOUTMIX1] |= LOUTMIX1_LI2LOVOL(2);
wm8975_regs[ROUTMIX2] &= ~ROUTMIX2_RI2ROVOL_MASK;
wm8975_regs[ROUTMIX2] |= ROUTMIX2_RI2ROVOL(2);
/* set mux to line input */
wm8975_write_and(LOUTMIX1, ~LOUTMIX1_LMIXSEL_MASK);
wm8975_write_and(ROUTMIX1, ~ROUTMIX1_RMIXSEL_MASK);
/* enable bypass */
wm8975_write_or(LOUTMIX1, LOUTMIX1_LI2LO);
wm8975_write_or(ROUTMIX2, ROUTMIX2_RI2RO);
} else {
/* disable bypass */
wm8975_write_and(LOUTMIX1, ~LOUTMIX1_LI2LO);
wm8975_write_and(ROUTMIX2, ~ROUTMIX2_RI2RO);
}
}
#endif /* HAVE_RECORDING */