[alsa-devel] [PATCH 3/3] ASoC: TWL6030: Handle power-up seq completion thru audio interrupt
Lopez Cruz, Misael
x0052729 at ti.com
Mon Sep 14 19:00:42 CEST 2009
NAUDINT interrupt line is provided by the TWL6030 codec to
signal externally events like headset plug/unplug, hook,
power-up sequence completion, etc.
When the codec is powered-up through external AUDPWRON line it
will start its power-up sequence. The completion of the sequence
is signaled through the audio interrupt, and then codec is
operational.
CODEC driver starts a wait_for_completion just after calling
external power-up callback. It's signaled as complete when
servicing READYINT interrupt.
MACHINE drivers should request IRQ line used in corresponding
hardware platform and initialize workqueue and completion structs
of twl6030_setup_data as well.
Signed-off-by: Misael Lopez Cruz <x0052729 at ti.com>
---
sound/soc/codecs/twl6030.c | 103 +++++++++++++++++++++++++++++++++++++++++---
sound/soc/codecs/twl6030.h | 17 +++++++
2 files changed, 113 insertions(+), 7 deletions(-)
diff --git a/sound/soc/codecs/twl6030.c b/sound/soc/codecs/twl6030.c
index 0f2269e..dc85399 100644
--- a/sound/soc/codecs/twl6030.c
+++ b/sound/soc/codecs/twl6030.c
@@ -43,6 +43,7 @@
/* codec private data */
struct twl6030_priv_data {
+ int codec_powered;
unsigned int sysclk;
};
@@ -54,7 +55,7 @@ static const u8 twl6030_reg[TWL6030_CACHEREGNUM] = {
0x4B, /* TWL6030_ASICID (ro) 0x01 */
0x00, /* TWL6030_ASICREV (ro) 0x02 */
0x00, /* TWL6030_INTID 0x03 */
- 0x41, /* TWL6030_INTMR 0x04 */
+ 0x00, /* TWL6030_INTMR 0x04 */
0x00, /* TWL6030_NCPCTRL 0x05 */
0x00, /* TWL6030_LDOCTL 0x06 */
0x00, /* TWL6030_HPPLLCTL 0x07 */
@@ -127,6 +128,23 @@ static inline void twl6030_write_reg_cache(struct snd_soc_codec *codec,
}
/*
+ * read from twl6030 hardware register
+ */
+static int twl6030_read(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ u8 value;
+
+ if (reg > TWL6030_CACHEREGNUM)
+ return -EIO;
+
+ twl_i2c_read_u8(TWL6030_MODULE_AUDIO, &value, reg);
+ twl6030_write_reg_cache(codec, reg, value);
+
+ return value;
+}
+
+/*
* write to the twl6030 register space
*/
static int twl6030_write(struct snd_soc_codec *codec,
@@ -159,27 +177,89 @@ static void twl6030_init_chip(struct snd_soc_codec *codec)
static void twl6030_power_up(struct snd_soc_codec *codec)
{
struct snd_soc_device *socdev = codec->socdev;
+ struct twl6030_priv_data *priv = codec->private_data;
struct twl6030_setup_data *setup = socdev->codec_data;
+ if (priv->codec_powered)
+ return;
+
setup->codec_enable(1);
+ /* wait for ready interrupt */
+ wait_for_completion(&setup->ready_completion);
+
/* sync registers updated during power-up sequence */
- twl6030_write_reg_cache(codec, TWL6030_REG_NCPCTL, 0x81);
- twl6030_write_reg_cache(codec, TWL6030_REG_LDOCTL, 0x45);
- twl6030_write_reg_cache(codec, TWL6030_REG_LPPLLCTL, 0x01);
+ twl6030_read(codec, TWL6030_REG_NCPCTL);
+ twl6030_read(codec, TWL6030_REG_LDOCTL);
+ twl6030_read(codec, TWL6030_REG_LPPLLCTL);
}
static void twl6030_power_down(struct snd_soc_codec *codec)
{
struct snd_soc_device *socdev = codec->socdev;
+ struct twl6030_priv_data *priv = codec->private_data;
struct twl6030_setup_data *setup = socdev->codec_data;
setup->codec_enable(0);
+ udelay(500);
/* sync registers updated during power-down sequence */
- twl6030_write_reg_cache(codec, TWL6030_REG_NCPCTL, 0x00);
- twl6030_write_reg_cache(codec, TWL6030_REG_LDOCTL, 0x00);
- twl6030_write_reg_cache(codec, TWL6030_REG_LPPLLCTL, 0x00);
+ twl6030_read(codec, TWL6030_REG_NCPCTL);
+ twl6030_read(codec, TWL6030_REG_LDOCTL);
+ twl6030_read(codec, TWL6030_REG_LPPLLCTL);
+
+ priv->codec_powered = 0;
+}
+
+/* audio interrupt handler */
+irqreturn_t twl6030_naudint_handler(int irq, void *data)
+{
+ struct twl6030_setup_data *setup = data;
+
+ schedule_work(&setup->audint_work);
+
+ /* disable audint irq to let workqueue to execute */
+ disable_irq_nosync(irq);
+
+ return IRQ_HANDLED;
+}
+
+void twl6030_naudint_work(struct work_struct *work)
+{
+ struct snd_soc_codec *codec;
+ struct twl6030_setup_data *setup;
+ struct twl6030_priv_data *priv;
+ u8 intid;
+
+ setup = container_of(work, struct twl6030_setup_data, audint_work);
+ codec = setup->codec;
+ priv = codec->private_data;
+
+ twl_i2c_read_u8(TWL6030_MODULE_AUDIO, &intid, TWL6030_REG_INTID);
+
+ switch (intid) {
+ case TWL6030_THINT:
+ dev_alert(codec->dev, "die temp over-limit detection\n");
+ break;
+ case TWL6030_PLUGINT:
+ case TWL6030_UNPLUGINT:
+ case TWL6030_HOOKINT:
+ break;
+ case TWL6030_HFINT:
+ dev_alert(codec->dev, "hf drivers over current detection\n");
+ break;
+ case TWL6030_VIBINT:
+ dev_alert(codec->dev, "vib drivers over current detection\n");
+ break;
+ case TWL6030_READYINT:
+ priv->codec_powered = 1;
+ complete(&setup->ready_completion);
+ break;
+ default:
+ dev_err(codec->dev, "unknown twl6030 audio interrupt\n");
+ }
+
+ enable_irq(setup->irq);
}
/* set headset dac and driver power mode */
@@ -679,6 +759,7 @@ static int twl6030_resume(struct platform_device *pdev)
static int twl6030_init(struct snd_soc_device *socdev)
{
struct snd_soc_codec *codec = socdev->card->codec;
+ struct twl6030_setup_data *setup = socdev->codec_data;
int ret = 0;
dev_info(codec->dev, "TWL6030 Audio Codec init\n");
@@ -703,6 +784,14 @@ static int twl6030_init(struct snd_soc_device *socdev)
goto pcm_err;
}
+ /* platform setup data is required for power-off/off the device */
+ if (setup == NULL) {
+ printk(KERN_ERR "twl6030: platform setup data missing\n");
+ goto pcm_err;
+ }
+
+ setup->codec = codec;
+
/* power on device */
twl6030_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
diff --git a/sound/soc/codecs/twl6030.h b/sound/soc/codecs/twl6030.h
index 9e49c85..1e1fb3f 100644
--- a/sound/soc/codecs/twl6030.h
+++ b/sound/soc/codecs/twl6030.h
@@ -64,6 +64,16 @@
#define TWL6030_CACHEREGNUM (TWL6030_REG_STATUS + 1)
+/* INTID (0x03) fields */
+
+#define TWL6030_THINT 0x01
+#define TWL6030_PLUGINT 0x02
+#define TWL6030_UNPLUGINT 0x04
+#define TWL6030_HOOKINT 0x08
+#define TWL6030_HFINT 0x10
+#define TWL6030_VIBINT 0x20
+#define TWL6030_READYINT 0x40
+
/* HPPLLCTL (0x07) fields */
#define TWL6030_HPLLENA 0x01
@@ -105,8 +115,15 @@
extern struct snd_soc_dai twl6030_dai;
extern struct snd_soc_codec_device soc_codec_dev_twl6030;
+irqreturn_t twl6030_naudint_handler(int irq, void *data);
+void twl6030_naudint_work(struct work_struct *work);
+
struct twl6030_setup_data {
void (*codec_enable)(int enable);
+ int irq;
+ struct work_struct audint_work;
+ struct completion ready_completion;
+ struct snd_soc_codec *codec;
};
#endif /* End of __TWL6030_H__ */
--
1.5.4.3
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