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WM8750 - add ALC and NGAT related low level functions (disabled now by default)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27587 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Marcin Bukat 2010-07-27 20:57:33 +00:00
parent 24bde73d1e
commit 451138ba74
2 changed files with 123 additions and 5 deletions
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118
firmware/drivers/audio/wm8751.c
View file

@ -98,6 +98,50 @@ static int tone_tenthdb2hw(int value)
return value;
}
#if 0
static int alc_tenthdb2hw(int value)
{
/* -28.5dB - -6dB step 1.5dB - translate -285 - -60 step 15
to 0 - 15 step 1
*/
value = 15 - (value + 60)/15;
}
static int alc_hldus2hw(unsigned int value)
{
/* 0000 - 0us
* 0001 - 2670us
* 0010 - 5330us
*
* 1111 - 43691000us
*/
return 0;
}
static int alc_dcyms2hw(int value)
{
/* 0000 - 24ms
* 0001 - 48ms
* 0010 - 96ms
*
* 1010 or higher 24580ms
*/
return 0;
}
static int alc_atkms2hw(int value)
{
/* 0000 - 6ms
* 0001 - 12ms
* 0010 - 24ms
*
* 1010 or higher 6140ms
*/
return 0;
}
#endif
#ifdef USE_ADAPTIVE_BASS
static int adaptivebass2hw(int value)
@ -110,6 +154,14 @@ static int adaptivebass2hw(int value)
#endif
#if defined(HAVE_WM8750)
#if 0
static int ngath_tenthdb2hw(int value)
{
/* -76.5dB - -30dB in 1.5db steps -765 - -300 in 15 steps */
value = 31 - (value + 300)/15;
return value;
}
#endif
static int recvol2hw(int value)
{
/* convert tenth of dB of input volume (-172...300) to input register value */
@ -317,6 +369,72 @@ void audiohw_set_depth_3d(int val)
#endif
#ifdef HAVE_RECORDING
#if 0
void audiohw_set_ngath(int ngath, int type, bool enable)
{
/* This function controls Noise gate function
* of the codec. This can only run in conjunction
* with ALC
*/
if(enable)
wmcodec_write(NGAT, NGAT_NGG(type)|NGAT_NGTH(ngath)|NGAT_NGAT);
else
wmcodec_write(NGAT, NGAT_NGG(type)|NGAT_NGTH(ngath_tenthdb2hw(ngath)));
}
void audiohw_set_alc(int level, unsigned int hold, int decay, int attack, bool enable)
{
/* level in thenth of dB -28.5dB - -6dB in 1.5dB steps
* hold time in us 0us - 43691000us
* decay time in ms 24ms - 24580ms
* attack time in ms 6ms - 6140ms
*/
if(enable)
{
wmcodec_write(ALC1, ALC1_ALCSEL_STEREO|ALC1_MAXGAIN(0x07)|
ALC1_ALCL(alc_tenthdb2hw(level)));
wmcodec_write(ALC2, ALC2_ALCZ|ALC2_HLD(alc_hldus2hw(hold)));
wmcodec_write(ALC3, ALC3_DCY(alc_dcyms2hw(decay))|
ALC3_ATK(alc_atkms2hw(attack)));
}
else
{
wmcodec_write(ALC1, ALC1_ALCSEL_DISABLED|ALC1_MAXGAIN(0x07)|ALC1_ALCL(alc_tenthdb2hw(level)));
}
}
void audiohw_set_alc(int level, unsigned int hold, int decay, int attack, bool enable)
{
/* level in thenth of dB -28.5dB - -6dB in 1.5dB steps
* hold time in 15 steps 0ms,2.67ms,5.33ms,...,43691ms
* decay time in 10 steps 24ms,48ms,96ms,...,24580ms
* attack time in 10 steps 6ms,12ms,24ms,...,6140ms
*/
if(enable)
{
wmcodec_write(ALC1, ALC1_ALCSEL_STEREO|ALC1_MAXGAIN(0x07)|
ALC1_ALCL(alc_tenthdb2hw(level)));
wmcodec_write(ALC2, ALC2_ALCZ|ALC2_HLD(hold));
wmcodec_write(ALC3, ALC3_DCY(decay)|
ALC3_ATK(attack));
}
else
{
wmcodec_write(ALC1, ALC1_ALCSEL_DISABLED|ALC1_MAXGAIN(0x07)|
ALC1_ALCL(alc_tenthdb2hw(level)));
}
}
void audiohw_set_alc_level(int level)
{
wmcodec_write(ALC1, ALC1_ALCSEL_STEREO|ALC1_MAXGAIN(0x07)|
ALC1_ALCL(alc_tenthdb2hw(level)));
}
#endif
void audiohw_set_recsrc(int source, bool recording)
{
/* INPUT1 - FM radio

10
firmware/export/wm8751.h
View file

@ -131,8 +131,8 @@ void audiohw_set_recsrc(int source, bool recording);
#define ENHANCE_3D_MODE3D_RECORD (0 << 7)
#define ALC1 0x11
#define ALC1_ALCL(x) ((x) & (0x0f))
#define ALC1_MAXGAIN(x) ((x) & (0x07 << 4))
#define ALC1_ALCL(x) ((x) & 0x0f)
#define ALC1_MAXGAIN(x) (((x) & 0x07) << 4)
#define ALC1_ALCSEL_DISABLED (0 << 7)
#define ALC1_ALCSEL_RIGHT (1 << 7)
#define ALC1_ALCSEL_LEFT (2 << 7)
@ -144,14 +144,14 @@ void audiohw_set_recsrc(int source, bool recording);
#define ALC3 0x13
#define ALC3_ATK(x) ((x) & 0x0f)
#define ALC3_DCY(x) ((x) & (0x0f << 4))
#define ALC3_DCY(x) (((x) & 0x0f) << 4)
#define NGAT 0x14
#define NGAT_NGAT (1 << 0)
#define NGAT_NGG_CONST (0 << 1)
#define NGAT_NGG_MUTEADC (1 << 1)
#define NGAT_NGG(x) ((x) & (0x3 << 1))
#define NGAT_NGTH(x) ((x) & (0x1f << 3))
#define NGAT_NGG(x) (((x) & 0x3) << 1)
#define NGAT_NGTH(x) (((x) & 0x1f) << 3)
#endif
#define ADDITIONAL1 0x17