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 <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
