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stmp3700: implement speaker support by mean of lineout

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Change-Id: Ic4c8b536fde7a840d3f3f295531cc1253de6320d
This commit is contained in:
Amaury Pouly 2014-02-22 20:38:40 +01:00
parent b9db3d3743
commit 1450f2658a
1 changed files with 37 additions and 0 deletions
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37
firmware/target/arm/imx233/audioout-imx233.c
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@ -264,6 +264,11 @@ void imx233_audioout_set_3d_effect(int val)
void imx233_audioout_enable_spkr(bool en)
{
/* avoid power sequence if not needed */
static bool spkr_en = false;
if(en == spkr_en)
return;
spkr_en = true;
#if IMX233_SUBTARGET >= 3780
if(en)
{
@ -275,6 +280,38 @@ void imx233_audioout_enable_spkr(bool en)
BF_SET(AUDIOOUT_SPEAKERCTRL, MUTE);
BF_SET(AUDIOOUT_PWRDN, SPEAKER);
}
#elif IMX233_SUBTARGET >= 3700
/* assume speaker is wired to lineout */
if(en)
{
/** 1) make sure charge capacitors are discharged */
BF_WR(AUDIOOUT_LINEOUTCTRL, CHARGE_CAP, 2);
/** 2) set min gain, nominal vag levels and zerocross desires */
/* volume is decreasing with the value in the register */
BF_SET(AUDIOOUT_LINEOUTCTRL, VOLUME_LEFT);
BF_SET(AUDIOOUT_LINEOUTCTRL, VOLUME_RIGHT);
BF_SET(AUDIOOUT_LINEOUTCTRL, EN_LINEOUT_ZCD);
/* vag should be set to VDDIO/2, 0 is 1.725V, 15 is 1.350V, 25mV steps */
int vddio;
imx233_power_get_regulator(REGULATOR_VDDIO, &vddio, NULL);
BF_WR(AUDIOOUT_LINEOUTCTRL, VAG_CTRL, 15 - (vddio / 2 - 1350) / 25);
/** 3) Power up lineout */
BF_CLR(AUDIOOUT_PWRDN, LINEOUT);
/** 4) Ramp the vag */
BF_WR(AUDIOOUT_LINEOUTCTRL, CHARGE_CAP, 1);
/** 5) Unmute */
BF_CLR(AUDIOOUT_LINEOUTCTRL, MUTE);
/** 6) Ramp volume */
BF_WR(AUDIOOUT_LINEOUTCTRL, VOLUME_LEFT, 0);
BF_WR(AUDIOOUT_LINEOUTCTRL, VOLUME_RIGHT, 0);
}
else
{
/** Reverse procedure */
BF_SET(AUDIOOUT_LINEOUTCTRL, MUTE);
BF_WR(AUDIOOUT_LINEOUTCTRL, CHARGE_CAP, 2);
BF_SET(AUDIOOUT_PWRDN, LINEOUT);
}
#else
(void) en;
#endif