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/***************************************************************************
* __________ __ ___.
* 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)
*
* 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 "kernel.h"
#include "wmcodec.h"
#include "i2s.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)
/* 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
/* 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
#ifdef CPU_PP502x
i2s_reset();
#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);
/* 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);
}
/* 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. */
#ifdef MROBE_100
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
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);
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_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);
}
/* 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);
}
/* Note: Disable output before calling this function */
void audiohw_set_frequency(int fsel)
{
wmcodec_write(CLOCKING, fsel);
}
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