236 lines
8.7 KiB
C
236 lines
8.7 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2011 by Amaury Pouly
|
|
*
|
|
* 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 "audioout-imx233.h"
|
|
#include "clkctrl-imx233.h"
|
|
#include "rtc-imx233.h"
|
|
#include "pcm_sampr.h"
|
|
|
|
static int hp_vol_l, hp_vol_r;
|
|
static struct timeout hp_unmute_oneshort;
|
|
|
|
static int hp_unmute_cb(struct timeout *tmo)
|
|
{
|
|
(void) tmo;
|
|
/* unmute HP */
|
|
__REG_CLR(HW_AUDIOOUT_HPVOL) = HW_AUDIOOUT_HPVOL__MUTE;
|
|
return 0;
|
|
}
|
|
|
|
void imx233_audioout_preinit(void)
|
|
{
|
|
/* Enable AUDIOOUT block */
|
|
imx233_reset_block(&HW_AUDIOOUT_CTRL);
|
|
/* Enable digital filter clock */
|
|
imx233_clkctrl_enable_xtal(XTAL_FILT, true);
|
|
/* Enable DAC */
|
|
__REG_CLR(HW_AUDIOOUT_ANACLKCTRL) = HW_AUDIOOUT_ANACLKCTRL__CLKGATE;
|
|
/* Set capless mode */
|
|
__REG_CLR(HW_AUDIOOUT_PWRDN) = HW_AUDIOOUT_PWRDN__CAPLESS;
|
|
/* Set word-length to 16-bit */
|
|
__REG_SET(HW_AUDIOOUT_CTRL) = HW_AUDIOOUT_CTRL__WORD_LENGTH;
|
|
/* Power up DAC */
|
|
__REG_CLR(HW_AUDIOOUT_PWRDN) = HW_AUDIOOUT_PWRDN__DAC;
|
|
/* Hold HP to ground to avoid pop, then release and power up HP */
|
|
__REG_SET(HW_AUDIOOUT_ANACTRL) = HW_AUDIOOUT_ANACTRL__HP_HOLD_GND;
|
|
__REG_CLR(HW_AUDIOOUT_PWRDN) = HW_AUDIOOUT_PWRDN__HEADPHONE;
|
|
/* Set HP mode to AB */
|
|
__REG_SET(HW_AUDIOOUT_ANACTRL) = HW_AUDIOOUT_ANACTRL__HP_CLASSAB;
|
|
/* change biais to -50% */
|
|
__REG_CLR(HW_AUDIOOUT_TEST) = HW_AUDIOOUT_TEST__HP_I1_ADJ_BM;
|
|
__REG_SET(HW_AUDIOOUT_TEST) = HW_AUDIOOUT_TEST__HP_I1_ADJ_M_50;
|
|
__REG_CLR(HW_AUDIOOUT_REFCTRL) = HW_AUDIOOUT_REFCTRL__BIAS_CTRL_BM;
|
|
__REG_SET(HW_AUDIOOUT_REFCTRL) = 1 << HW_AUDIOOUT_REFCTRL__BIAS_CTRL_BP;
|
|
__REG_SET(HW_AUDIOOUT_REFCTRL) = HW_AUDIOOUT_REFCTRL__RAISE_REF;
|
|
__REG_SET(HW_AUDIOOUT_REFCTRL) = HW_AUDIOOUT_REFCTRL__XTAL_BGR_BIAS;
|
|
/* Stop holding to ground */
|
|
__REG_CLR(HW_AUDIOOUT_ANACTRL) = HW_AUDIOOUT_ANACTRL__HP_HOLD_GND;
|
|
/* Set dmawait count to 31 (see errata, workaround random stop) */
|
|
__REG_CLR(HW_AUDIOOUT_CTRL) = HW_AUDIOOUT_CTRL__DMAWAIT_COUNT_BM;
|
|
__REG_SET(HW_AUDIOOUT_CTRL) = 31 << HW_AUDIOOUT_CTRL__DMAWAIT_COUNT_BP;
|
|
/* start converting audio */
|
|
__REG_SET(HW_AUDIOOUT_CTRL) = HW_AUDIOOUT_CTRL__RUN;
|
|
/* unmute DAC */
|
|
__REG_CLR(HW_AUDIOOUT_DACVOLUME) = HW_AUDIOOUT_DACVOLUME__MUTE_LEFT |
|
|
HW_AUDIOOUT_DACVOLUME__MUTE_RIGHT;
|
|
/* send a few samples to avoid pop */
|
|
HW_AUDIOOUT_DATA = 0;
|
|
HW_AUDIOOUT_DATA = 0;
|
|
HW_AUDIOOUT_DATA = 0;
|
|
HW_AUDIOOUT_DATA = 0;
|
|
/* wait for everything to stabilize before unmuting */
|
|
timeout_register(&hp_unmute_oneshort, hp_unmute_cb, HZ / 2, 0);
|
|
}
|
|
|
|
void imx233_audioout_postinit(void)
|
|
{
|
|
}
|
|
|
|
void imx233_audioout_close(void)
|
|
{
|
|
/* Switch to class A */
|
|
__REG_CLR(HW_AUDIOOUT_ANACTRL) = HW_AUDIOOUT_ANACTRL__HP_CLASSAB;
|
|
/* Hold HP to ground */
|
|
__REG_SET(HW_AUDIOOUT_ANACTRL) = HW_AUDIOOUT_ANACTRL__HP_HOLD_GND;
|
|
/* Mute HP and power down */
|
|
__REG_SET(HW_AUDIOOUT_HPVOL) = HW_AUDIOOUT_HPVOL__MUTE;
|
|
/* Power down HP */
|
|
__REG_SET(HW_AUDIOOUT_PWRDN) = HW_AUDIOOUT_PWRDN__HEADPHONE;
|
|
/* Mute DAC */
|
|
__REG_SET(HW_AUDIOOUT_DACVOLUME) = HW_AUDIOOUT_DACVOLUME__MUTE_LEFT
|
|
| HW_AUDIOOUT_DACVOLUME__MUTE_RIGHT;
|
|
/* Power down DAC */
|
|
__REG_SET(HW_AUDIOOUT_PWRDN) = HW_AUDIOOUT_PWRDN__DAC;
|
|
/* Gate off DAC */
|
|
__REG_SET(HW_AUDIOOUT_ANACLKCTRL) = HW_AUDIOOUT_ANACLKCTRL__CLKGATE;
|
|
/* Disable digital filter clock */
|
|
imx233_clkctrl_enable_xtal(XTAL_FILT, false);
|
|
/* will also gate off the module */
|
|
__REG_CLR(HW_AUDIOOUT_CTRL) = HW_AUDIOOUT_CTRL__RUN;
|
|
}
|
|
|
|
/* volume in half dB
|
|
* don't check input values */
|
|
static void set_dac_vol(int vol_l, int vol_r)
|
|
{
|
|
/* minimum is -100dB and max is 0dB */
|
|
vol_l = MAX(-200, MIN(vol_l, 0));
|
|
vol_r = MAX(-200, MIN(vol_r, 0));
|
|
/* unmute, enable zero cross and set volume.
|
|
* 0xff is 0dB */
|
|
HW_AUDIOOUT_DACVOLUME =
|
|
(0xff + vol_l) << HW_AUDIOOUT_DACVOLUME__VOLUME_LEFT_BP |
|
|
(0xff + vol_r) << HW_AUDIOOUT_DACVOLUME__VOLUME_RIGHT_BP |
|
|
HW_AUDIOOUT_DACVOLUME__EN_ZCD;
|
|
}
|
|
|
|
/* volume in half dB
|
|
* don't check input values */
|
|
static void set_hp_vol(int vol_l, int vol_r)
|
|
{
|
|
uint32_t select = (HW_AUDIOOUT_HPVOL & HW_AUDIOOUT_HPVOL__SELECT);
|
|
/* minimum is -57.5dB and max is 6dB in DAC mode
|
|
* and -51.5dB / 12dB in Line1 mode */
|
|
int min = select ? -103 : -115;
|
|
int max = select ? 24 : 12;
|
|
|
|
vol_l = MAX(min, MIN(vol_l, max));
|
|
vol_r = MAX(min, MIN(vol_r, max));
|
|
/* unmute, enable zero cross and set volume. Keep select value. */
|
|
HW_AUDIOOUT_HPVOL =
|
|
(max - vol_l) << HW_AUDIOOUT_HPVOL__VOL_LEFT_BP |
|
|
(max - vol_r) << HW_AUDIOOUT_HPVOL__VOL_RIGHT_BP |
|
|
select |
|
|
HW_AUDIOOUT_HPVOL__EN_MSTR_ZCD;
|
|
}
|
|
|
|
static void apply_volume(void)
|
|
{
|
|
/* Two cases: line1 and dac */
|
|
if(HW_AUDIOOUT_HPVOL & HW_AUDIOOUT_HPVOL__SELECT)
|
|
{
|
|
/* In line1 mode, the HP is the only way to adjust the volume */
|
|
set_hp_vol(hp_vol_l, hp_vol_r);
|
|
}
|
|
else
|
|
{
|
|
/* In DAC mode we can use both the HP and the DAC volume.
|
|
* Use the DAC for volume <0 and HP for volume >0 */
|
|
set_dac_vol(MIN(0, hp_vol_l), MIN(0, hp_vol_r));
|
|
set_hp_vol(MAX(0, hp_vol_l), MAX(0, hp_vol_r));
|
|
}
|
|
}
|
|
|
|
void imx233_audioout_set_hp_vol(int vol_l, int vol_r)
|
|
{
|
|
hp_vol_l = vol_l;
|
|
hp_vol_r = vol_r;
|
|
apply_volume();
|
|
}
|
|
|
|
void imx233_audioout_set_freq(int fsel)
|
|
{
|
|
static struct
|
|
{
|
|
int base_mult;
|
|
int src_hold;
|
|
int src_int;
|
|
int src_frac;
|
|
}dacssr[HW_NUM_FREQ] =
|
|
{
|
|
HW_HAVE_8_([HW_FREQ_8] = { 0x1, 0x3, 0x17, 0xe00 } ,)
|
|
HW_HAVE_11_([HW_FREQ_11] = { 0x1, 0x3, 0x11, 0x37 } ,)
|
|
HW_HAVE_12_([HW_FREQ_12] = { 0x1, 0x3, 0xf, 0x13ff },)
|
|
HW_HAVE_16_([HW_FREQ_16] = { 0x1, 0x1, 0x17, 0xe00},)
|
|
HW_HAVE_22_([HW_FREQ_22] = { 0x1, 0x1, 0x11, 0x37 },)
|
|
HW_HAVE_24_([HW_FREQ_24] = { 0x1, 0x1, 0xf, 0x13ff },)
|
|
HW_HAVE_32_([HW_FREQ_32] = { 0x1, 0x0, 0x17, 0xe00},)
|
|
HW_HAVE_44_([HW_FREQ_44] = { 0x1, 0x0, 0x11, 0x37 },)
|
|
HW_HAVE_48_([HW_FREQ_48] = { 0x1, 0x0, 0xf, 0x13ff },)
|
|
HW_HAVE_64_([HW_FREQ_64] = { 0x2, 0x0, 0x17, 0xe00},)
|
|
HW_HAVE_88_([HW_FREQ_88] = { 0x2, 0x0, 0x11, 0x37 },)
|
|
HW_HAVE_96_([HW_FREQ_96] = { 0x2, 0x0, 0xf, 0x13ff },)
|
|
};
|
|
|
|
HW_AUDIOOUT_DACSRR =
|
|
dacssr[fsel].src_frac << HW_AUDIOOUT_DACSRR__SRC_FRAC_BP |
|
|
dacssr[fsel].src_int << HW_AUDIOOUT_DACSRR__SRC_INT_BP |
|
|
dacssr[fsel].src_hold << HW_AUDIOOUT_DACSRR__SRC_HOLD_BP |
|
|
dacssr[fsel].base_mult << HW_AUDIOOUT_DACSRR__BASEMULT_BP;
|
|
|
|
#if 0
|
|
/* Select base_mult and src_hold depending on the audio range:
|
|
* 0 < f <= 12000 --> base_mult = 1, src_hold = 3 (div by 4)
|
|
* 12000 < f <= 24000 --> base_mult = 1, src_hold = 1 (div by 2)
|
|
* 24000 < f <= 48000 --> base_mult = 1, src_hold = 0 (div by 1)
|
|
* 48000 < f <= 96000 --> base_mult = 2, src_hold = 0 (mul by 2)
|
|
* 96000 < f <= ..... --> base_mult = 4, src_hold = 0 (mul by 4) */
|
|
int base_mult = 1;
|
|
int src_hold = 0;
|
|
if(f > 96000)
|
|
base_mult = 4;
|
|
else if(f > 48000)
|
|
base_mult = 2;
|
|
else if(f <= 12000)
|
|
src_hold = 3;
|
|
else if(f <= 24000)
|
|
src_hold = 1;
|
|
/* compute the divisor (a tricky to keep to do it with 32-bit words only) */
|
|
int src_int = (750000 * base_mult) / (f * (src_hold + 1));
|
|
int src_frac = ((750000 * base_mult - src_int * f * (src_hold + 1)) << 13) / (f * (src_hold + 1));
|
|
|
|
HW_AUDIOOUT_DACSRR =
|
|
src_frac << HW_AUDIOOUT_DACSRR__SRC_FRAC_BP |
|
|
src_int << HW_AUDIOOUT_DACSRR__SRC_INT_BP |
|
|
src_hold << HW_AUDIOOUT_DACSRR__SRC_HOLD_BP |
|
|
base_mult << HW_AUDIOOUT_DACSRR__BASEMULT_BP;
|
|
#endif
|
|
}
|
|
|
|
/* select between DAC and Line1 */
|
|
void imx233_audioout_select_hp_input(bool line1)
|
|
{
|
|
if(line1)
|
|
__REG_SET(HW_AUDIOOUT_HPVOL) = HW_AUDIOOUT_HPVOL__SELECT;
|
|
else
|
|
__REG_CLR(HW_AUDIOOUT_HPVOL) = HW_AUDIOOUT_HPVOL__SELECT;
|
|
/* reapply volume setting */
|
|
apply_volume();
|
|
}
|