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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)
*
* 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 "logf.h"
#include "system.h"
#include "string.h"
#include "audio.h"
#include "wmcodec.h"
#include "wm8975.h"
#include "i2s.h"
/* use zero crossing to reduce clicks during volume changes */
#define VOLUME_ZC_WAIT (1<<7)
/* 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);
}
}
/* convert tenth of dB volume (-780..0) to mixer volume register value */
int tenthdb2mixer(int db)
{
(void)db;
return 0;
}
void audiohw_reset(void);
#define IPOD_PCM_LEVEL 0x65 /* -6dB */
/* Silently enable / disable audio output */
void audiohw_enable_output(bool enable)
{
if (enable)
{
/* reset the I2S controller into known state */
i2s_reset();
/*
* 1. Switch on power supplies.
* By default the WM8750L 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, 0x1ff); /*Reset*/
wmcodec_write(RESET, 0x0);
/* 2. Enable Vmid and VREF. */
wmcodec_write(PWRMGMT1, 0xc0); /*Pwr Mgmt(1)*/
/* From app notes: allow Vref to stabilize to reduce clicks */
sleep(HZ/4);
/* 3. Enable DACs as required. */
wmcodec_write(PWRMGMT2, 0x180); /*Pwr Mgmt(2)*/
/* 4. Enable line and / or headphone output buffers as required. */
wmcodec_write(PWRMGMT2, 0x1f8); /*Pwr Mgmt(2)*/
/* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */
/* IWL=00(16 bit) FORMAT=10(I2S format) */
wmcodec_write(AINTFCE, 0x42);
/* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */
audiohw_set_sample_rate(WM8975_44100HZ);
/* set the volume to -6dB */
wmcodec_write(LOUT1VOL, VOLUME_ZC_WAIT | IPOD_PCM_LEVEL);
wmcodec_write(ROUT1VOL, VOLUME_ZC_WAIT | 0x100 | IPOD_PCM_LEVEL);
wmcodec_write(LOUTMIX1, 0x150); /* Left out Mix(def) */
wmcodec_write(LOUTMIX2, 0x50);
wmcodec_write(ROUTMIX1, 0x50); /* Right out Mix(def) */
wmcodec_write(ROUTMIX2, 0x150);
wmcodec_write(MOUTMIX1, 0x0); /* Mono out Mix */
wmcodec_write(MOUTMIX2, 0x0);
audiohw_mute(0);
} else {
audiohw_mute(1);
}
}
int 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) */
/* OUT1 */
wmcodec_write(LOUT1VOL, VOLUME_ZC_WAIT | vol_l);
wmcodec_write(ROUT1VOL, VOLUME_ZC_WAIT | 0x100 | vol_r);
return 0;
}
int audiohw_set_lineout_vol(int vol_l, int vol_r)
{
/* OUT2 */
wmcodec_write(LOUT2VOL, VOLUME_ZC_WAIT | vol_l);
wmcodec_write(ROUT2VOL, VOLUME_ZC_WAIT | 0x100 | vol_r);
return 0;
}
int audiohw_set_mixer_vol(int channel1, int channel2)
{
(void)channel1;
(void)channel2;
return 0;
}
void audiohw_set_bass(int value)
{
const int regvalues[] = {
11, 10, 10, 9, 8, 8, 0xf, 6, 6, 5, 4, 4, 3, 2, 1, 0
};
if ((value >= -6) && (value <= 9)) {
/* We use linear bass control with 200 Hz cutoff */
wmcodec_write(BASSCTRL, regvalues[value + 6] | 0x40);
}
}
void audiohw_set_treble(int value)
{
const int regvalues[] = {
11, 10, 10, 9, 8, 8, 0xf, 6, 6, 5, 4, 4, 3, 2, 1, 0
};
if ((value >= -6) && (value <= 9)) {
/* We use linear treble control with 4 kHz cutoff */
wmcodec_write(TREBCTRL, regvalues[value + 6] | 0x40);
}
}
int audiohw_mute(int mute)
{
if (mute)
{
/* Set DACMU = 1 to soft-mute the audio DACs. */
wmcodec_write(DACCTRL, 0x8);
} else {
/* Set DACMU = 0 to soft-un-mute the audio DACs. */
wmcodec_write(DACCTRL, 0x0);
}
return 0;
}
/* Nice shutdown of WM8975 codec */
void audiohw_close(void)
{
/* 1. Set DACMU = 1 to soft-mute the audio DACs. */
wmcodec_write(DACCTRL, 0x8);
/* 2. Disable all output buffers. */
wmcodec_write(PWRMGMT2, 0x0); /*Pwr Mgmt(2)*/
/* 3. Switch off the power supplies. */
wmcodec_write(PWRMGMT1, 0x0); /*Pwr Mgmt(1)*/
}
/* Change the order of the noise shaper, 5th order is recommended above 32kHz */
void audiohw_set_nsorder(int order)
{
(void)order;
}
/* Note: Disable output before calling this function */
void audiohw_set_sample_rate(int sampling_control) {
wmcodec_write(0x08, sampling_control);
}
void audiohw_enable_recording(bool source_mic)
{
(void)source_mic;
/* reset the I2S controller into known state */
i2s_reset();
/*
* 1. Switch on power supplies.
* By default the WM8750L 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(0x0f, 0x1ff);
wmcodec_write(0x0f, 0x000);
/* 2. Enable Vmid and VREF. */
wmcodec_write(0x19, 0xc0); /*Pwr Mgmt(1)*/
/* 3. Enable ADCs as required. */
wmcodec_write(0x19, 0xcc); /*Pwr Mgmt(1)*/
wmcodec_write(0x1a, 0x180); /*Pwr Mgmt(2)*/
/* 4. Enable line and / or headphone output buffers as required. */
wmcodec_write(0x19, 0xfc); /*Pwr Mgmt(1)*/
/* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */
/* IWL=00(16 bit) FORMAT=10(I2S format) */
wmcodec_write(0x07, 0x42);
/* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */
audiohw_set_sample_rate(WM8975_44100HZ);
/* unmute inputs */
wmcodec_write(0x00, 0x17); /* LINVOL (def 0dB) */
wmcodec_write(0x01, 0x117); /* RINVOL (def 0dB) */
wmcodec_write(0x15, 0x1d7); /* LADCVOL max vol x was ff */
wmcodec_write(0x16, 0x1d7); /* RADCVOL max vol x was ff */
if (source_mic) {
/* VSEL=10(def) DATSEL=10 (use right ADC only) */
wmcodec_write(0x17, 0xc9); /* Additional control(1) */
/* VROI=1 (sets output resistance to 40kohms) */
wmcodec_write(0x1b, 0x40); /* Additional control(3) */
/* LINSEL=1 (LINPUT2) LMICBOOST=10 (20dB boost) */
wmcodec_write(0x20, 0x60); /* ADCL signal path */
wmcodec_write(0x21, 0x60); /* ADCR signal path */
} else {
/* VSEL=10(def) DATSEL=00 (left->left, right->right) */
wmcodec_write(0x17, 0xc1); /* Additional control(1) */
/* VROI=1 (sets output resistance to 40kohms) */
wmcodec_write(0x1b, 0x40); /* Additional control(3) */
/* LINSEL=0 (LINPUT1) LMICBOOST=00 (bypass boost) */
wmcodec_write(0x20, 0x00); /* ADCL signal path */
/* RINSEL=0 (RINPUT1) RMICBOOST=00 (bypass boost) */
wmcodec_write(0x21, 0x00); /* ADCR signal path */
}
}
void audiohw_disable_recording(void) {
/* 1. Set DACMU = 1 to soft-mute the audio DACs. */
wmcodec_write(0x05, 0x8);
/* 2. Disable all output buffers. */
wmcodec_write(0x1a, 0x0); /*Pwr Mgmt(2)*/
/* 3. Switch off the power supplies. */
wmcodec_write(0x19, 0x0); /*Pwr Mgmt(1)*/
}
void audiohw_set_recvol(int left, int right, int type) {
(void)left;
(void)right;
(void)type;
}
void audiohw_set_monitor(int enable) {
(void)enable;
}
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