[alsa-devel] [PATCHv3 3/7] ASoC: TWL6030: Manual power-up/down sequences
Lopez Cruz, Misael
x0052729 at ti.com
Tue Oct 6 09:29:55 CEST 2009
TWL6030 codec device can be powered-up/down through a specific register
writes sequence. These sequences can be used when no gpio line is
provided for AUDPWRON.
When the codec is powered-up in this way, automatic power-down sequence
(triggered by thermal shutdown) is not possible.
Signed-off-by: Misael Lopez Cruz <x0052729 at ti.com>
---
sound/soc/codecs/twl6030.c | 112 ++++++++++++++++++++++++++++++++++++++-----
sound/soc/codecs/twl6030.h | 16 ++++++
2 files changed, 115 insertions(+), 13 deletions(-)
diff --git a/sound/soc/codecs/twl6030.c b/sound/soc/codecs/twl6030.c
index 3c6c540..f97dec2 100644
--- a/sound/soc/codecs/twl6030.c
+++ b/sound/soc/codecs/twl6030.c
@@ -244,6 +244,88 @@ static void twl6030_init_vdd_regs(struct snd_soc_codec *codec)
}
}
+/* twl6030 codec manual power-up sequence */
+static void twl6030_power_up(struct snd_soc_codec *codec)
+{
+ u8 ncpctl, ldoctl, lppllctl, accctl;
+
+ ncpctl = twl6030_read_reg_cache(codec, TWL6030_REG_NCPCTL);
+ ldoctl = twl6030_read_reg_cache(codec, TWL6030_REG_LDOCTL);
+ lppllctl = twl6030_read_reg_cache(codec, TWL6030_REG_LPPLLCTL);
+ accctl = twl6030_read_reg_cache(codec, TWL6030_REG_ACCCTL);
+
+ /* enable reference system */
+ ldoctl |= TWL6030_REFENA;
+ twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
+ mdelay(10);
+ /* enable internal oscillator */
+ ldoctl |= TWL6030_OSCENA;
+ twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
+ udelay(10);
+ /* enable high-side ldo */
+ ldoctl |= TWL6030_HSLDOENA;
+ twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
+ udelay(244);
+ /* enable negative charge pump */
+ ncpctl |= TWL6030_NCPENA | TWL6030_NCPOPEN;
+ twl6030_write(codec, TWL6030_REG_NCPCTL, ncpctl);
+ udelay(488);
+ /* enable low-side ldo */
+ ldoctl |= TWL6030_LSLDOENA;
+ twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
+ udelay(244);
+ /* enable low-power pll */
+ lppllctl |= TWL6030_LPLLENA;
+ twl6030_write(codec, TWL6030_REG_LPPLLCTL, lppllctl);
+ /* reset state machine */
+ accctl |= TWL6030_RESETSPLIT;
+ twl6030_write(codec, TWL6030_REG_ACCCTL, accctl);
+ mdelay(5);
+ accctl &= ~TWL6030_RESETSPLIT;
+ twl6030_write(codec, TWL6030_REG_ACCCTL, accctl);
+ /* disable internal oscillator */
+ ldoctl &= ~TWL6030_OSCENA;
+ twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
+}
+
+/* twl6030 codec manual power-down sequence */
+static void twl6030_power_down(struct snd_soc_codec *codec)
+{
+ u8 ncpctl, ldoctl, lppllctl, accctl;
+
+ ncpctl = twl6030_read_reg_cache(codec, TWL6030_REG_NCPCTL);
+ ldoctl = twl6030_read_reg_cache(codec, TWL6030_REG_LDOCTL);
+ lppllctl = twl6030_read_reg_cache(codec, TWL6030_REG_LPPLLCTL);
+ accctl = twl6030_read_reg_cache(codec, TWL6030_REG_ACCCTL);
+
+ /* enable internal oscillator */
+ ldoctl |= TWL6030_OSCENA;
+ twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
+ udelay(10);
+ /* disable low-power pll */
+ lppllctl &= ~TWL6030_LPLLENA;
+ twl6030_write(codec, TWL6030_REG_LPPLLCTL, lppllctl);
+ /* disable low-side ldo */
+ ldoctl &= ~TWL6030_LSLDOENA;
+ twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
+ udelay(244);
+ /* disable negative charge pump */
+ ncpctl &= ~(TWL6030_NCPENA | TWL6030_NCPOPEN);
+ twl6030_write(codec, TWL6030_REG_NCPCTL, ncpctl);
+ udelay(488);
+ /* disable high-side ldo */
+ ldoctl &= ~TWL6030_HSLDOENA;
+ twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
+ udelay(244);
+ /* disable internal oscillator */
+ ldoctl &= ~TWL6030_OSCENA;
+ twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
+ /* disable reference system */
+ ldoctl &= ~TWL6030_REFENA;
+ twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
+ mdelay(10);
+}
+
/*
* MICATT volume control:
* from -6 to 0 dB in 6 dB steps
@@ -480,12 +562,15 @@ static int twl6030_set_bias_level(struct snd_soc_codec *codec,
/* power-up sequence latency */
mdelay(16);
- }
- /* sync registers updated during power-up sequence */
- twl6030_read(codec, TWL6030_REG_NCPCTL);
- twl6030_read(codec, TWL6030_REG_LDOCTL);
- twl6030_read(codec, TWL6030_REG_LPPLLCTL);
+ /* sync registers updated during power-up sequence */
+ twl6030_read(codec, TWL6030_REG_NCPCTL);
+ twl6030_read(codec, TWL6030_REG_LDOCTL);
+ twl6030_read(codec, TWL6030_REG_LPPLLCTL);
+ } else {
+ /* use manual power-up sequence */
+ twl6030_power_up(codec);
+ }
/* initialize vdd/vss registers with reg_cache */
twl6030_init_vdd_regs(codec);
@@ -502,12 +587,16 @@ static int twl6030_set_bias_level(struct snd_soc_codec *codec,
/* power-down sequence latency */
udelay(500);
- }
- /* sync registers updated during power-down sequence */
- twl6030_read(codec, TWL6030_REG_NCPCTL);
- twl6030_read(codec, TWL6030_REG_LDOCTL);
- twl6030_write_reg_cache(codec, TWL6030_REG_LPPLLCTL, 0x00);
+ /* sync registers updated during power-down sequence */
+ twl6030_read(codec, TWL6030_REG_NCPCTL);
+ twl6030_read(codec, TWL6030_REG_LDOCTL);
+ twl6030_write_reg_cache(codec, TWL6030_REG_LPPLLCTL,
+ 0x00);
+ } else {
+ /* use manual power-down sequence */
+ twl6030_power_down(codec);
+ }
priv->codec_powered = 0;
break;
@@ -723,9 +812,6 @@ static int __devinit twl6030_codec_probe(struct platform_device *pdev)
goto gpio2_err;
priv->codec_powered = 0;
- } else {
- /* if no gpio is provided, then assume its always on */
- priv->codec_powered = 1;
}
/* init vio registers */
diff --git a/sound/soc/codecs/twl6030.h b/sound/soc/codecs/twl6030.h
index d99d469..7375ae8 100644
--- a/sound/soc/codecs/twl6030.h
+++ b/sound/soc/codecs/twl6030.h
@@ -67,6 +67,18 @@
#define TWL6030_VIOREGNUM 18
#define TWL6030_VDDREGNUM 21
+/* NCPCTL (0x05) fields */
+
+#define TWL6030_NCPENA 0x01
+#define TWL6030_NCPOPEN 0x40
+
+/* LDOCTL (0x06) fields */
+
+#define TWL6030_LSLDOENA 0x01
+#define TWL6030_HSLDOENA 0x04
+#define TWL6030_REFENA 0x40
+#define TWL6030_OSCENA 0x80
+
/* HPPLLCTL (0x07) fields */
#define TWL6030_HPLLENA 0x01
@@ -88,6 +100,10 @@
#define TWL6030_LPLLFIN 0x08
#define TWL6030_HPLLSEL 0x10
+/* ACCCTL (0x2D) fields */
+
+#define TWL6030_RESETSPLIT 0x04
+
extern struct snd_soc_dai twl6030_dai;
extern struct snd_soc_codec_device soc_codec_dev_twl6030;
--
1.5.4.3
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