summaryrefslogtreecommitdiffstats
path: root/sound/soc
diff options
context:
space:
mode:
authorStanley.Miao <stanley.miao@windriver.com>2008-12-11 23:28:10 +0800
committerMark Brown <broonie@opensource.wolfsonmicro.com>2008-12-11 16:12:22 +0000
commit49d92c7d5bbd158734bc34ed578a68b214a48583 (patch)
tree99f3b1be80b7c27a10e8204d24c03b3bec243513 /sound/soc
parent4544f8a22f38ba4560320fcfbe8c7e81562ddc6f (diff)
downloadop-kernel-dev-49d92c7d5bbd158734bc34ed578a68b214a48583.zip
op-kernel-dev-49d92c7d5bbd158734bc34ed578a68b214a48583.tar.gz
ASoC: TWL4030: hands-free start-up sequence.
A special start-up sequence is required to reduce the pop-noise of Class D amplifier when enable hands-free on TWL4030. Signed-off-by: Stanley.Miao <stanley.miao@windriver.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc')
-rw-r--r--sound/soc/codecs/twl4030.c34
-rw-r--r--sound/soc/codecs/twl4030.h6
2 files changed, 36 insertions, 4 deletions
diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
index 1377302..5184888 100644
--- a/sound/soc/codecs/twl4030.c
+++ b/sound/soc/codecs/twl4030.c
@@ -322,6 +322,30 @@ static int outmixer_event(struct snd_soc_dapm_widget *w,
return ret;
}
+static int handsfree_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ struct soc_enum *e = (struct soc_enum *)w->kcontrols->private_value;
+ unsigned char hs_ctl;
+
+ hs_ctl = twl4030_read_reg_cache(w->codec, e->reg);
+
+ if (hs_ctl & TWL4030_HF_CTL_REF_EN) {
+ hs_ctl |= TWL4030_HF_CTL_RAMP_EN;
+ twl4030_write(w->codec, e->reg, hs_ctl);
+ hs_ctl |= TWL4030_HF_CTL_LOOP_EN;
+ twl4030_write(w->codec, e->reg, hs_ctl);
+ hs_ctl |= TWL4030_HF_CTL_HB_EN;
+ twl4030_write(w->codec, e->reg, hs_ctl);
+ } else {
+ hs_ctl &= ~(TWL4030_HF_CTL_RAMP_EN | TWL4030_HF_CTL_LOOP_EN
+ | TWL4030_HF_CTL_HB_EN);
+ twl4030_write(w->codec, e->reg, hs_ctl);
+ }
+
+ return 0;
+}
+
/*
* Some of the gain controls in TWL (mostly those which are associated with
* the outputs) are implemented in an interesting way:
@@ -806,10 +830,12 @@ static const struct snd_soc_dapm_widget twl4030_dapm_widgets[] = {
SND_SOC_DAPM_MUX("CarkitR Mux", SND_SOC_NOPM, 0, 0,
&twl4030_dapm_carkitr_control),
/* HandsfreeL/R */
- SND_SOC_DAPM_MUX("HandsfreeL Mux", TWL4030_REG_HFL_CTL, 5, 0,
- &twl4030_dapm_handsfreel_control),
- SND_SOC_DAPM_MUX("HandsfreeR Mux", TWL4030_REG_HFR_CTL, 5, 0,
- &twl4030_dapm_handsfreer_control),
+ SND_SOC_DAPM_MUX_E("HandsfreeL Mux", TWL4030_REG_HFL_CTL, 5, 0,
+ &twl4030_dapm_handsfreel_control, handsfree_event,
+ SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_MUX_E("HandsfreeR Mux", TWL4030_REG_HFR_CTL, 5, 0,
+ &twl4030_dapm_handsfreer_control, handsfree_event,
+ SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_ADC("ADCL", "Left Capture", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_ADC("ADCR", "Right Capture", SND_SOC_NOPM, 0, 0),
diff --git a/sound/soc/codecs/twl4030.h b/sound/soc/codecs/twl4030.h
index a2065d4..54615c7 100644
--- a/sound/soc/codecs/twl4030.h
+++ b/sound/soc/codecs/twl4030.h
@@ -191,6 +191,12 @@
#define TWL4030_RAMP_DELAY_2581MS 0x1C
#define TWL4030_RAMP_EN 0x02
+/* HFL_CTL (0x29, 0x2A) Fields */
+#define TWL4030_HF_CTL_HB_EN 0x04
+#define TWL4030_HF_CTL_LOOP_EN 0x08
+#define TWL4030_HF_CTL_RAMP_EN 0x10
+#define TWL4030_HF_CTL_REF_EN 0x20
+
/* APLL_CTL (0x3A) Fields */
#define TWL4030_APLL_EN 0x10
OpenPOWER on IntegriCloud