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rockbox/firmware/drivers/audio/wm8758.c
Amaury Pouly 69ea311398 wm8758: document and fix audiohw settings 
It looks like a copy and paste error to me, those were completely wrong.

Change-Id: Id6ae025f4216ffccb1a8b8b790916d8b6c4694bd
2016-12-12 13:12:47 +01:00

330 lines
11 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Driver for WM8758 audio codec - based on datasheet for WM8983
*
* 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 "system.h"
#include "kernel.h"
#include "string.h"
#include "audio.h"
#include "wmcodec.h"
#include "audiohw.h"
#include "sound.h"
/* shadow registers */
static unsigned short eq1_reg = EQ1_EQ3DMODE | EQ_GAIN_VALUE(0);
static unsigned short eq5_reg = EQ_GAIN_VALUE(0);
/* convert tenth of dB volume (-89..6) to master volume register value */
static int vol_tenthdb2hw(int db)
{
/* att DAC AMP result
+6dB 0 +6 96
0dB 0 0 90
-57dB 0 -57 33
-58dB -1 -57 32
-89dB -32 -57 1
-90dB -oo -oo 0 */
if (db <= -900) {
return 0;
} else {
return db / 10 - -90;
}
}
/* helper function that calculates the register setting for amplifier and
DAC volume out of the input from tenthdb2master() */
static void get_volume_params(int db, int *dac, int *amp)
{
/* should never happen, set max volume for amp and dac */
if (db > 96) {
*dac = 255;
*amp = 63;
}
/* set dac to max and set volume for amp (better snr) */
else if (db > 32) {
*dac = 255;
*amp = (db-90)+57;
}
/* set amp to min and reduce dac output */
else if (db > 0) {
*dac = (db-33)*2 + 255;
*amp = 0;
}
/* mute all */
else {
*dac = 0x00;
*amp = 0x40;
}
}
static void audiohw_mute(bool mute)
{
if (mute) {
wmcodec_write(DACCTRL, DACCTRL_SOFTMUTE);
} else {
wmcodec_write(DACCTRL, DACCTRL_DACOSR128);
}
}
void audiohw_preinit(void)
{
/* Set low bias mode */
wmcodec_write(BIASCTRL, BIASCTRL_BIASCUT);
/* Enable HPCOM, LINECOM */
wmcodec_write(OUTCTRL, OUTCTRL_HP_COM | OUTCTRL_LINE_COM
| OUTCTRL_TSOPCTRL | OUTCTRL_TSDEN | OUTCTRL_VROI);
/* Mute all Outputs and set PGAs minimum gain */
wmcodec_write(LOUT1VOL, 0x140);
wmcodec_write(ROUT1VOL, 0x140);
wmcodec_write(LOUT2VOL, 0x140);
wmcodec_write(ROUT2VOL, 0x140);
wmcodec_write(OUT3MIX, 0x40);
wmcodec_write(OUT4MIX, 0x40);
/* Enable L/ROUT1 */
wmcodec_write(PWRMGMT2, PWRMGMT2_ROUT1EN | PWRMGMT2_LOUT1EN);
/* Enable VMID independent current bias */
wmcodec_write(OUT4TOADC, OUT4TOADC_POBCTRL);
/* Enable required DACs and mixers */
wmcodec_write(PWRMGMT3, PWRMGMT3_RMIXEN | PWRMGMT3_LMIXEN
| PWRMGMT3_DACENR | PWRMGMT3_DACENL);
/* Enable VMIDSEL, BIASEN, BUFIOEN */
wmcodec_write(PWRMGMT1, PWRMGMT1_PLLEN | PWRMGMT1_BIASEN
| PWRMGMT1_BUFIOEN | PWRMGMT1_VMIDSEL_10K);
/* Setup digital interface, input amplifiers, PLL, ADCs and DACs */
wmcodec_write(AINTFCE, AINTFCE_IWL_16BIT | AINTFCE_FORMAT_I2S);
wmcodec_write(CLKCTRL, CLKCTRL_MS); /* WM8758 is clock master */
audiohw_set_frequency(HW_FREQ_44);
wmcodec_write(LOUTMIX, LOUTMIX_DACL2LMIX);
wmcodec_write(ROUTMIX, ROUTMIX_DACR2RMIX);
/* Disable VMID independent current bias */
wmcodec_write(OUT4TOADC, 0);
}
void audiohw_postinit(void)
{
wmcodec_write(PWRMGMT1, PWRMGMT1_PLLEN | PWRMGMT1_BIASEN
| PWRMGMT1_BUFIOEN | PWRMGMT1_VMIDSEL_500K);
/* lower the VMID power consumption */
wmcodec_write(BIASCTRL, 0);
audiohw_mute(false);
}
void audiohw_set_volume(int vol_l, int vol_r)
{
int dac_l, amp_l, dac_r, amp_r;
vol_l = vol_tenthdb2hw(vol_l);
vol_r = vol_tenthdb2hw(vol_r);
get_volume_params(vol_l, &dac_l, &amp_l);
get_volume_params(vol_r, &dac_r, &amp_r);
/* set DAC
Important: DAC is global and will also affect lineout */
wmcodec_write(LDACVOL, dac_l);
wmcodec_write(RDACVOL, dac_r | RDACVOL_DACVU);
/* set headphone amp OUT1 */
wmcodec_write(LOUT1VOL, amp_l | LOUT1VOL_LOUT1ZC);
wmcodec_write(ROUT1VOL, amp_r | ROUT1VOL_ROUT1ZC | ROUT1VOL_OUT1VU);
}
void audiohw_set_lineout_volume(int vol_l, int vol_r)
{
int dac_l, amp_l, dac_r, amp_r;
vol_l = vol_tenthdb2hw(vol_l);
vol_r = vol_tenthdb2hw(vol_r);
get_volume_params(vol_l, &dac_l, &amp_l);
get_volume_params(vol_r, &dac_r, &amp_r);
/* set lineout amp OUT2 */
wmcodec_write(LOUT2VOL, amp_l | LOUT2VOL_LOUT2ZC);
wmcodec_write(ROUT2VOL, amp_r | ROUT2VOL_ROUT2ZC | ROUT2VOL_OUT2VU);
}
void audiohw_enable_lineout(bool enable)
{
/* Initialize data without lineout enabling. */
int pwrmgmt3_data = PWRMGMT3_RMIXEN | PWRMGMT3_LMIXEN
| PWRMGMT3_DACENR | PWRMGMT3_DACENL;
/* Set lineout (OUT2), if enabled. */
if (enable)
pwrmgmt3_data |= PWRMGMT3_LOUT2EN | PWRMGMT3_ROUT2EN;
/* Set register. */
wmcodec_write(PWRMGMT3, pwrmgmt3_data);
}
void audiohw_set_bass(int value)
{
eq1_reg = (eq1_reg & ~EQ_GAIN_MASK) | EQ_GAIN_VALUE(value);
wmcodec_write(EQ1, eq1_reg);
}
void audiohw_set_bass_cutoff(int value)
{
eq1_reg = (eq1_reg & ~EQ_CUTOFF_MASK) | EQ_CUTOFF_VALUE(value);
wmcodec_write(EQ1, eq1_reg);
}
void audiohw_set_treble(int value)
{
eq5_reg = (eq5_reg & ~EQ_GAIN_MASK) | EQ_GAIN_VALUE(value);
wmcodec_write(EQ5, eq5_reg);
}
void audiohw_set_treble_cutoff(int value)
{
eq5_reg = (eq5_reg & ~EQ_CUTOFF_MASK) | EQ_CUTOFF_VALUE(value);
wmcodec_write(EQ5, eq5_reg);
}
/* Nice shutdown of WM8758 codec */
void audiohw_close(void)
{
audiohw_mute(true);
/* Disable Thermal shutdown */
wmcodec_write(OUTCTRL, OUTCTRL_HP_COM | OUTCTRL_VROI);
/* Enable VMIDTOG */
wmcodec_write(OUT4TOADC, OUT4TOADC_VMIDTOG);
/* Disable VMIDSEL and BUFIOEN */
wmcodec_write(PWRMGMT1, PWRMGMT1_PLLEN | PWRMGMT1_BIASEN
| PWRMGMT1_VMIDSEL_OFF);
/* Wait for VMID to discharge */
sleep(3*HZ/10);
/* Power off registers */
wmcodec_write(PWRMGMT2, 0);
wmcodec_write(PWRMGMT3, 0);
wmcodec_write(PWRMGMT1, 0);
}
/* Note: Disable output before calling this function */
void audiohw_set_frequency(int fsel)
{
/* CLKCTRL_MCLKDIV_MASK and ADDCTRL_SR_MASK don't overlap,
so they can both fit in one byte. Bit 0 selects PLL
configuration via pll_setups.
*/
static const unsigned char freq_setups[HW_NUM_FREQ] =
{
[HW_FREQ_48] = CLKCTRL_MCLKDIV_2 | ADDCTRL_SR_48kHz | 1,
[HW_FREQ_44] = CLKCTRL_MCLKDIV_2 | ADDCTRL_SR_48kHz,
[HW_FREQ_32] = CLKCTRL_MCLKDIV_3 | ADDCTRL_SR_32kHz | 1,
[HW_FREQ_24] = CLKCTRL_MCLKDIV_4 | ADDCTRL_SR_24kHz | 1,
[HW_FREQ_22] = CLKCTRL_MCLKDIV_4 | ADDCTRL_SR_24kHz,
[HW_FREQ_16] = CLKCTRL_MCLKDIV_6 | ADDCTRL_SR_16kHz | 1,
[HW_FREQ_12] = CLKCTRL_MCLKDIV_8 | ADDCTRL_SR_12kHz | 1,
[HW_FREQ_11] = CLKCTRL_MCLKDIV_8 | ADDCTRL_SR_12kHz,
[HW_FREQ_8] = CLKCTRL_MCLKDIV_12 | ADDCTRL_SR_8kHz | 1
};
/* Each PLL configuration is an array consisting of
{ PLLN, PLLK1, PLLK2, PLLK3 }. The WM8983 datasheet requires
5 < PLLN < 13, and states optimum is PLLN = 8, f2 = 90 MHz
*/
static const unsigned short pll_setups[2][4] =
{
/* f1 = 12 MHz, R = 7.5264, f2 = 90.3168 MHz, fPLLOUT = 22.5792 MHz */
{ PLLN_PLLPRESCALE | 0x7, 0x21, 0x161, 0x26 },
/* f1 = 12 MHz, R = 8.192, f2 = 98.304 MHz, fPLLOUT = 24.576 MHz */
{ PLLN_PLLPRESCALE | 0x8, 0xC, 0x93, 0xE9 }
};
int i;
/* PLLN, PLLK1, PLLK2, PLLK3 are contiguous (at 0x24 to 0x27) */
for (i = 0; i < 4; i++)
wmcodec_write(PLLN + i, pll_setups[freq_setups[fsel] & 1][i]);
/* CLKCTRL_MCLKDIV divides fPLLOUT to get SYSCLK (256 * sample rate) */
wmcodec_write(CLKCTRL, CLKCTRL_CLKSEL
| (freq_setups[fsel] & CLKCTRL_MCLKDIV_MASK)
| CLKCTRL_BCLKDIV_2 | CLKCTRL_MS);
/* set ADC and DAC filter characteristics according to sample rate */
wmcodec_write(ADDCTRL, (freq_setups[fsel] & ADDCTRL_SR_MASK)
| ADDCTRL_SLOWCLKEN);
/* SLOWCLK enabled for zero cross timeout to work */
}
void audiohw_enable_recording(bool source_mic)
{
(void)source_mic; /* We only have a line-in (I think) */
wmcodec_write(PWRMGMT2, PWRMGMT2_ROUT1EN | PWRMGMT2_LOUT1EN
| PWRMGMT2_INPGAENR | PWRMGMT2_INPGAENL
| PWRMGMT2_ADCENR | PWRMGMT2_ADCENL);
wmcodec_write(INCTRL, INCTRL_R2_2INPGA | INCTRL_L2_2INPGA);
wmcodec_write(LADCBOOST, LADCBOOST_L2_2BOOST(5));
wmcodec_write(RADCBOOST, RADCBOOST_R2_2BOOST(5));
/* Enable monitoring */
wmcodec_write(LOUTMIX, LOUTMIX_BYP2LMIXVOL(5)
| LOUTMIX_BYPL2LMIX | LOUTMIX_DACL2LMIX);
wmcodec_write(ROUTMIX, ROUTMIX_BYP2RMIXVOL(5)
| ROUTMIX_BYPR2RMIX | ROUTMIX_DACR2RMIX);
}
void audiohw_disable_recording(void)
{
wmcodec_write(LOUTMIX, LOUTMIX_DACL2LMIX);
wmcodec_write(ROUTMIX, ROUTMIX_DACR2RMIX);
wmcodec_write(PWRMGMT2, PWRMGMT2_ROUT1EN | PWRMGMT2_LOUT1EN);
}
/* volume in 0 .. 63, corresponds to -12dB .. +35.25dB in 0.75dB steps */
void audiohw_set_recvol(int left, int right, int type)
{
switch (type)
{
case AUDIO_GAIN_MIC:
right = left;
/* fall through */
case AUDIO_GAIN_LINEIN:
wmcodec_write(LINPGAVOL, LINPGAVOL_INPGAZCL
| (left & LINPGAVOL_INPGAVOL_MASK));
wmcodec_write(RINPGAVOL, RINPGAVOL_INPGAVU | RINPGAVOL_INPGAZCR
| (right & RINPGAVOL_INPGAVOL_MASK));
break;
default:
return;
}
}
void audiohw_set_monitor(bool enable)
{
(void)enable;
}
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