From: Hans de Goede Date: Thu, 3 Jan 2019 13:45:26 +0000 (+0100) Subject: ASoC: es8316: Add jack-detect support X-Git-Tag: v5.1-rc1~148^2~23^2~153^2~16 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=822257661031faa437336058d8a32bf1844ad9c6;p=linux.git ASoC: es8316: Add jack-detect support Adding jack-detect support may seem weird for a codec with only a single output, but it is necessary. The ES8316 appnote showing the intended usage uses a jack-receptacle which physically disconnects the speakers from the output when a jack is plugged in. But all 3 devices using the es8316 which I have (2 Cherry Trail devices and one Bay Trail CR device), use an analog mux to disconnect the speakers, driven by a GPIO. In order to enable/disable the speakers at the right time, we need jack-detect. The same goes for the microphone where we must correctly set the mux for the single ADC to either the internal or the headset microphone. All devices I have support the es8316's builtin jack-detect functionality. Signed-off-by: Hans de Goede Signed-off-by: Mark Brown --- diff --git a/sound/soc/codecs/es8316.c b/sound/soc/codecs/es8316.c index e97d12d578b0..26413851e434 100644 --- a/sound/soc/codecs/es8316.c +++ b/sound/soc/codecs/es8316.c @@ -15,12 +15,14 @@ #include #include #include +#include #include #include #include #include #include #include +#include #include "es8316.h" /* In slave mode at single speed, the codec is documented as accepting 5 @@ -33,6 +35,11 @@ static const unsigned int supported_mclk_lrck_ratios[] = { }; struct es8316_priv { + struct mutex lock; + struct regmap *regmap; + struct snd_soc_component *component; + struct snd_soc_jack *jack; + int irq; unsigned int sysclk; unsigned int allowed_rates[NR_SUPPORTED_MCLK_LRCK_RATIOS]; struct snd_pcm_hw_constraint_list sysclk_constraints; @@ -529,8 +536,162 @@ static struct snd_soc_dai_driver es8316_dai = { .symmetric_rates = 1, }; +static void es8316_enable_micbias_for_mic_gnd_short_detect( + struct snd_soc_component *component) +{ + struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component); + + snd_soc_dapm_mutex_lock(dapm); + snd_soc_dapm_force_enable_pin_unlocked(dapm, "Bias"); + snd_soc_dapm_force_enable_pin_unlocked(dapm, "Analog power"); + snd_soc_dapm_force_enable_pin_unlocked(dapm, "Mic Bias"); + snd_soc_dapm_sync_unlocked(dapm); + snd_soc_dapm_mutex_unlock(dapm); + + msleep(20); +} + +static void es8316_disable_micbias_for_mic_gnd_short_detect( + struct snd_soc_component *component) +{ + struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component); + + snd_soc_dapm_mutex_lock(dapm); + snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Bias"); + snd_soc_dapm_disable_pin_unlocked(dapm, "Analog power"); + snd_soc_dapm_disable_pin_unlocked(dapm, "Bias"); + snd_soc_dapm_sync_unlocked(dapm); + snd_soc_dapm_mutex_unlock(dapm); +} + +static irqreturn_t es8316_irq(int irq, void *data) +{ + struct es8316_priv *es8316 = data; + struct snd_soc_component *comp = es8316->component; + unsigned int flags; + + mutex_lock(&es8316->lock); + + regmap_read(es8316->regmap, ES8316_GPIO_FLAG, &flags); + if (flags == 0x00) + goto out; /* Powered-down / reset */ + + /* Catch spurious IRQ before set_jack is called */ + if (!es8316->jack) + goto out; + + dev_dbg(comp->dev, "gpio flags %#04x\n", flags); + if (flags & ES8316_GPIO_FLAG_HP_NOT_INSERTED) { + /* Jack removed, or spurious IRQ? */ + if (es8316->jack->status & SND_JACK_MICROPHONE) + es8316_disable_micbias_for_mic_gnd_short_detect(comp); + + if (es8316->jack->status & SND_JACK_HEADPHONE) { + snd_soc_jack_report(es8316->jack, 0, + SND_JACK_HEADSET | SND_JACK_BTN_0); + dev_dbg(comp->dev, "jack unplugged\n"); + } + } else if (!(es8316->jack->status & SND_JACK_HEADPHONE)) { + /* Jack inserted, determine type */ + es8316_enable_micbias_for_mic_gnd_short_detect(comp); + regmap_read(es8316->regmap, ES8316_GPIO_FLAG, &flags); + dev_dbg(comp->dev, "gpio flags %#04x\n", flags); + if (flags & ES8316_GPIO_FLAG_HP_NOT_INSERTED) { + /* Jack unplugged underneath us */ + es8316_disable_micbias_for_mic_gnd_short_detect(comp); + } else if (flags & ES8316_GPIO_FLAG_GM_NOT_SHORTED) { + /* Open, headset */ + snd_soc_jack_report(es8316->jack, + SND_JACK_HEADSET, + SND_JACK_HEADSET); + /* Keep mic-gnd-short detection on for button press */ + } else { + /* Shorted, headphones */ + snd_soc_jack_report(es8316->jack, + SND_JACK_HEADPHONE, + SND_JACK_HEADSET); + /* No longer need mic-gnd-short detection */ + es8316_disable_micbias_for_mic_gnd_short_detect(comp); + } + } else if (es8316->jack->status & SND_JACK_MICROPHONE) { + /* Interrupt while jack inserted, report button state */ + if (flags & ES8316_GPIO_FLAG_GM_NOT_SHORTED) { + /* Open, button release */ + snd_soc_jack_report(es8316->jack, 0, SND_JACK_BTN_0); + } else { + /* Short, button press */ + snd_soc_jack_report(es8316->jack, + SND_JACK_BTN_0, + SND_JACK_BTN_0); + } + } + +out: + mutex_unlock(&es8316->lock); + return IRQ_HANDLED; +} + +static void es8316_enable_jack_detect(struct snd_soc_component *component, + struct snd_soc_jack *jack) +{ + struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component); + + mutex_lock(&es8316->lock); + + es8316->jack = jack; + + if (es8316->jack->status & SND_JACK_MICROPHONE) + es8316_enable_micbias_for_mic_gnd_short_detect(component); + + snd_soc_component_update_bits(component, ES8316_GPIO_DEBOUNCE, + ES8316_GPIO_ENABLE_INTERRUPT, + ES8316_GPIO_ENABLE_INTERRUPT); + + mutex_unlock(&es8316->lock); + + /* Enable irq and sync initial jack state */ + enable_irq(es8316->irq); + es8316_irq(es8316->irq, es8316); +} + +static void es8316_disable_jack_detect(struct snd_soc_component *component) +{ + struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component); + + disable_irq(es8316->irq); + + mutex_lock(&es8316->lock); + + snd_soc_component_update_bits(component, ES8316_GPIO_DEBOUNCE, + ES8316_GPIO_ENABLE_INTERRUPT, 0); + + if (es8316->jack->status & SND_JACK_MICROPHONE) { + es8316_disable_micbias_for_mic_gnd_short_detect(component); + snd_soc_jack_report(es8316->jack, 0, SND_JACK_BTN_0); + } + + es8316->jack = NULL; + + mutex_unlock(&es8316->lock); +} + +static int es8316_set_jack(struct snd_soc_component *component, + struct snd_soc_jack *jack, void *data) +{ + if (jack) + es8316_enable_jack_detect(component, jack); + else + es8316_disable_jack_detect(component); + + return 0; +} + static int es8316_probe(struct snd_soc_component *component) { + struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component); + + es8316->component = component; + /* Reset codec and enable current state machine */ snd_soc_component_write(component, ES8316_RESET, 0x3f); usleep_range(5000, 5500); @@ -555,6 +716,7 @@ static int es8316_probe(struct snd_soc_component *component) static const struct snd_soc_component_driver soc_component_dev_es8316 = { .probe = es8316_probe, + .set_jack = es8316_set_jack, .controls = es8316_snd_controls, .num_controls = ARRAY_SIZE(es8316_snd_controls), .dapm_widgets = es8316_dapm_widgets, @@ -566,18 +728,29 @@ static const struct snd_soc_component_driver soc_component_dev_es8316 = { .non_legacy_dai_naming = 1, }; +static const struct regmap_range es8316_volatile_ranges[] = { + regmap_reg_range(ES8316_GPIO_FLAG, ES8316_GPIO_FLAG), +}; + +static const struct regmap_access_table es8316_volatile_table = { + .yes_ranges = es8316_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(es8316_volatile_ranges), +}; + static const struct regmap_config es8316_regmap = { .reg_bits = 8, .val_bits = 8, .max_register = 0x53, + .volatile_table = &es8316_volatile_table, .cache_type = REGCACHE_RBTREE, }; static int es8316_i2c_probe(struct i2c_client *i2c_client, const struct i2c_device_id *id) { + struct device *dev = &i2c_client->dev; struct es8316_priv *es8316; - struct regmap *regmap; + int ret; es8316 = devm_kzalloc(&i2c_client->dev, sizeof(struct es8316_priv), GFP_KERNEL); @@ -586,9 +759,23 @@ static int es8316_i2c_probe(struct i2c_client *i2c_client, i2c_set_clientdata(i2c_client, es8316); - regmap = devm_regmap_init_i2c(i2c_client, &es8316_regmap); - if (IS_ERR(regmap)) - return PTR_ERR(regmap); + es8316->regmap = devm_regmap_init_i2c(i2c_client, &es8316_regmap); + if (IS_ERR(es8316->regmap)) + return PTR_ERR(es8316->regmap); + + es8316->irq = i2c_client->irq; + mutex_init(&es8316->lock); + + ret = devm_request_threaded_irq(dev, es8316->irq, NULL, es8316_irq, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "es8316", es8316); + if (ret == 0) { + /* Gets re-enabled by es8316_set_jack() */ + disable_irq(es8316->irq); + } else { + dev_warn(dev, "Failed to get IRQ %d: %d\n", es8316->irq, ret); + es8316->irq = -ENXIO; + } return devm_snd_soc_register_component(&i2c_client->dev, &soc_component_dev_es8316, diff --git a/sound/soc/codecs/es8316.h b/sound/soc/codecs/es8316.h index 6bcdd63ea459..439a0130cbb7 100644 --- a/sound/soc/codecs/es8316.h +++ b/sound/soc/codecs/es8316.h @@ -126,4 +126,11 @@ #define ES8316_SERDATA2_LEN_16 0x0c #define ES8316_SERDATA2_LEN_32 0x10 +/* ES8316_GPIO_DEBOUNCE */ +#define ES8316_GPIO_ENABLE_INTERRUPT 0x02 + +/* ES8316_GPIO_FLAG */ +#define ES8316_GPIO_FLAG_GM_NOT_SHORTED 0x02 +#define ES8316_GPIO_FLAG_HP_NOT_INSERTED 0x04 + #endif