diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/codecs/bd28623.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/sound/soc/codecs/bd28623.c b/sound/soc/codecs/bd28623.c new file mode 100644 index 000000000..82a94211d --- /dev/null +++ b/sound/soc/codecs/bd28623.c @@ -0,0 +1,241 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// ROHM BD28623MUV class D speaker amplifier codec driver. +// +// Copyright (c) 2018 Socionext Inc. + +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/regulator/consumer.h> +#include <sound/pcm.h> +#include <sound/soc.h> + +#define BD28623_NUM_SUPPLIES 3 + +static const char *const bd28623_supply_names[BD28623_NUM_SUPPLIES] = { + "VCCA", + "VCCP1", + "VCCP2", +}; + +struct bd28623_priv { + struct device *dev; + struct regulator_bulk_data supplies[BD28623_NUM_SUPPLIES]; + struct gpio_desc *reset_gpio; + struct gpio_desc *mute_gpio; + + int switch_spk; +}; + +static const struct snd_soc_dapm_widget bd28623_widgets[] = { + SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_OUTPUT("OUT1P"), + SND_SOC_DAPM_OUTPUT("OUT1N"), + SND_SOC_DAPM_OUTPUT("OUT2P"), + SND_SOC_DAPM_OUTPUT("OUT2N"), +}; + +static const struct snd_soc_dapm_route bd28623_routes[] = { + { "OUT1P", NULL, "DAC" }, + { "OUT1N", NULL, "DAC" }, + { "OUT2P", NULL, "DAC" }, + { "OUT2N", NULL, "DAC" }, +}; + +static int bd28623_power_on(struct bd28623_priv *bd) +{ + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(bd->supplies), bd->supplies); + if (ret) { + dev_err(bd->dev, "Failed to enable supplies: %d\n", ret); + return ret; + } + + gpiod_set_value_cansleep(bd->reset_gpio, 0); + usleep_range(300000, 400000); + + return 0; +} + +static void bd28623_power_off(struct bd28623_priv *bd) +{ + gpiod_set_value_cansleep(bd->reset_gpio, 1); + + regulator_bulk_disable(ARRAY_SIZE(bd->supplies), bd->supplies); +} + +static int bd28623_get_switch_spk(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = + snd_soc_kcontrol_component(kcontrol); + struct bd28623_priv *bd = snd_soc_component_get_drvdata(component); + + ucontrol->value.integer.value[0] = bd->switch_spk; + + return 0; +} + +static int bd28623_set_switch_spk(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = + snd_soc_kcontrol_component(kcontrol); + struct bd28623_priv *bd = snd_soc_component_get_drvdata(component); + + if (bd->switch_spk == ucontrol->value.integer.value[0]) + return 0; + + bd->switch_spk = ucontrol->value.integer.value[0]; + + gpiod_set_value_cansleep(bd->mute_gpio, bd->switch_spk ? 0 : 1); + + return 0; +} + +static const struct snd_kcontrol_new bd28623_controls[] = { + SOC_SINGLE_BOOL_EXT("Speaker Switch", 0, + bd28623_get_switch_spk, bd28623_set_switch_spk), +}; + +static int bd28623_codec_probe(struct snd_soc_component *component) +{ + struct bd28623_priv *bd = snd_soc_component_get_drvdata(component); + int ret; + + bd->switch_spk = 1; + + ret = bd28623_power_on(bd); + if (ret) + return ret; + + gpiod_set_value_cansleep(bd->mute_gpio, bd->switch_spk ? 0 : 1); + + return 0; +} + +static void bd28623_codec_remove(struct snd_soc_component *component) +{ + struct bd28623_priv *bd = snd_soc_component_get_drvdata(component); + + bd28623_power_off(bd); +} + +static int bd28623_codec_suspend(struct snd_soc_component *component) +{ + struct bd28623_priv *bd = snd_soc_component_get_drvdata(component); + + bd28623_power_off(bd); + + return 0; +} + +static int bd28623_codec_resume(struct snd_soc_component *component) +{ + struct bd28623_priv *bd = snd_soc_component_get_drvdata(component); + int ret; + + ret = bd28623_power_on(bd); + if (ret) + return ret; + + gpiod_set_value_cansleep(bd->mute_gpio, bd->switch_spk ? 0 : 1); + + return 0; +} + +static const struct snd_soc_component_driver soc_codec_bd = { + .probe = bd28623_codec_probe, + .remove = bd28623_codec_remove, + .suspend = bd28623_codec_suspend, + .resume = bd28623_codec_resume, + .dapm_widgets = bd28623_widgets, + .num_dapm_widgets = ARRAY_SIZE(bd28623_widgets), + .dapm_routes = bd28623_routes, + .num_dapm_routes = ARRAY_SIZE(bd28623_routes), + .controls = bd28623_controls, + .num_controls = ARRAY_SIZE(bd28623_controls), + .idle_bias_on = 1, + .use_pmdown_time = 1, + .endianness = 1, +}; + +static struct snd_soc_dai_driver soc_dai_bd = { + .name = "bd28623-speaker", + .playback = { + .stream_name = "Playback", + .formats = SNDRV_PCM_FMTBIT_S32_LE | + SNDRV_PCM_FMTBIT_S24_LE | + SNDRV_PCM_FMTBIT_S16_LE, + .rates = SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_32000, + .channels_min = 2, + .channels_max = 2, + }, +}; + +static int bd28623_probe(struct platform_device *pdev) +{ + struct bd28623_priv *bd; + struct device *dev = &pdev->dev; + int i, ret; + + bd = devm_kzalloc(&pdev->dev, sizeof(struct bd28623_priv), GFP_KERNEL); + if (!bd) + return -ENOMEM; + + for (i = 0; i < ARRAY_SIZE(bd->supplies); i++) + bd->supplies[i].supply = bd28623_supply_names[i]; + + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(bd->supplies), + bd->supplies); + if (ret) { + dev_err(dev, "Failed to get supplies: %d\n", ret); + return ret; + } + + bd->reset_gpio = devm_gpiod_get_optional(dev, "reset", + GPIOD_OUT_HIGH); + if (IS_ERR(bd->reset_gpio)) { + dev_err(dev, "Failed to request reset_gpio: %ld\n", + PTR_ERR(bd->reset_gpio)); + return PTR_ERR(bd->reset_gpio); + } + + bd->mute_gpio = devm_gpiod_get_optional(dev, "mute", + GPIOD_OUT_HIGH); + if (IS_ERR(bd->mute_gpio)) { + dev_err(dev, "Failed to request mute_gpio: %ld\n", + PTR_ERR(bd->mute_gpio)); + return PTR_ERR(bd->mute_gpio); + } + + platform_set_drvdata(pdev, bd); + bd->dev = dev; + + return devm_snd_soc_register_component(dev, &soc_codec_bd, + &soc_dai_bd, 1); +} + +static const struct of_device_id bd28623_of_match[] __maybe_unused = { + { .compatible = "rohm,bd28623", }, + {} +}; +MODULE_DEVICE_TABLE(of, bd28623_of_match); + +static struct platform_driver bd28623_codec_driver = { + .driver = { + .name = "bd28623", + .of_match_table = of_match_ptr(bd28623_of_match), + }, + .probe = bd28623_probe, +}; +module_platform_driver(bd28623_codec_driver); + +MODULE_AUTHOR("Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>"); +MODULE_DESCRIPTION("ROHM BD28623 speaker amplifier driver"); +MODULE_LICENSE("GPL v2"); |