From 5f1aa4352ca253ca76ee49c51292994d517d7e4e Mon Sep 17 00:00:00 2001 From: Peter Malkin Date: Mon, 27 Mar 2017 16:38:21 -0700 Subject: [PATCH 087/454] Driver support for Google voiceHAT soundcard. --- sound/soc/bcm/Kconfig | 7 + sound/soc/bcm/Makefile | 6 + sound/soc/bcm/googlevoicehat-codec.c | 199 +++++++++++++++++++++++ sound/soc/bcm/googlevoicehat-soundcard.c | 124 ++++++++++++++ 4 files changed, 336 insertions(+) create mode 100644 sound/soc/bcm/googlevoicehat-codec.c create mode 100644 sound/soc/bcm/googlevoicehat-soundcard.c --- a/sound/soc/bcm/Kconfig +++ b/sound/soc/bcm/Kconfig @@ -18,6 +18,13 @@ config SND_SOC_CYGNUS If you don't know what to do here, say N. +config SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD + tristate "Support for Google voiceHAT soundcard" + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S + select SND_SOC_VOICEHAT + help + Say Y or M if you want to add support for voiceHAT soundcard. + config SND_BCM2708_SOC_HIFIBERRY_DAC tristate "Support for HifiBerry DAC" depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S --- a/sound/soc/bcm/Makefile +++ b/sound/soc/bcm/Makefile @@ -8,8 +8,12 @@ snd-soc-cygnus-objs := cygnus-pcm.o cygn obj-$(CONFIG_SND_SOC_CYGNUS) += snd-soc-cygnus.o +# Google voiceHAT custom codec support +snd-soc-googlevoicehat-codec-objs := googlevoicehat-codec.o + # BCM2708 Machine Support snd-soc-adau1977-adc-objs := adau1977-adc.o +snd-soc-googlevoicehat-soundcard-objs := googlevoicehat-soundcard.o snd-soc-hifiberry-amp-objs := hifiberry_amp.o snd-soc-hifiberry-dac-objs := hifiberry_dac.o snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o @@ -34,6 +38,8 @@ snd-soc-pisound-objs := pisound.o snd-soc-fe-pi-audio-objs := fe-pi-audio.o obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o +obj-$(CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD) += snd-soc-googlevoicehat-soundcard.o +obj-$(CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD) += snd-soc-googlevoicehat-codec.o obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP) += snd-soc-hifiberry-amp.o obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o --- /dev/null +++ b/sound/soc/bcm/googlevoicehat-codec.c @@ -0,0 +1,199 @@ +/* + * Driver for the Google voiceHAT audio codec for Raspberry Pi. + * + * Author: Peter Malkin + * Copyright 2016 + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ICS43432_RATE_MIN_HZ 7190 /* from data sheet */ +#define ICS43432_RATE_MAX_HZ 52800 /* from data sheet */ +#define SDMODE_DELAY_MS \ + 5 /* Delay in enabling SDMODE after clock settles to remove pop */ + +struct voicehat_priv { + struct delayed_work enable_sdmode_work; + struct gpio_desc *sdmode_gpio; + unsigned int sdmode_delay; +}; + +static void voicehat_enable_sdmode_work(struct work_struct *work) { + struct voicehat_priv *voicehat = + container_of(work, struct voicehat_priv, enable_sdmode_work.work); + gpiod_set_value(voicehat->sdmode_gpio, 1); +} + +static int voicehat_codec_probe(struct snd_soc_codec *codec) { + struct voicehat_priv *voicehat = snd_soc_codec_get_drvdata(codec); + + voicehat->sdmode_gpio = devm_gpiod_get(codec->dev, "sdmode", GPIOD_OUT_LOW); + if (IS_ERR(voicehat->sdmode_gpio)) { + dev_err(codec->dev, "Unable to allocate GPIO pin\n"); + return PTR_ERR(voicehat->sdmode_gpio); + } + + INIT_DELAYED_WORK(&voicehat->enable_sdmode_work, voicehat_enable_sdmode_work); + return 0; +} + +static int voicehat_codec_remove(struct snd_soc_codec *codec) { + struct voicehat_priv *voicehat = snd_soc_codec_get_drvdata(codec); + + cancel_delayed_work_sync(&voicehat->enable_sdmode_work); + + return 0; +} + +static const struct snd_soc_dapm_widget voicehat_dapm_widgets[] = { + SND_SOC_DAPM_OUTPUT("Speaker"), +}; + +static const struct snd_soc_dapm_route voicehat_dapm_routes[] = { + {"Speaker", NULL, "HiFi Playback"}, +}; + +static struct snd_soc_codec_driver voicehat_codec_driver = { + .probe = voicehat_codec_probe, + .remove = voicehat_codec_remove, +#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0) + .component_driver = { +#endif + .dapm_widgets = voicehat_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(voicehat_dapm_widgets), + .dapm_routes = voicehat_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(voicehat_dapm_routes), +#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0) + }, +#endif +}; + +static int voicehat_daiops_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) { + struct snd_soc_codec *codec = dai->codec; + struct voicehat_priv *voicehat = snd_soc_codec_get_drvdata(codec); + + if (voicehat->sdmode_delay == 0) return 0; + + dev_dbg(dai->dev, "CMD %d", cmd); + dev_dbg(dai->dev, "Playback Active %d", dai->playback_active); + dev_dbg(dai->dev, "Capture Active %d", dai->capture_active); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + if (dai->playback_active) { + dev_info(dai->dev, "Enabling audio amp...\n"); + queue_delayed_work(system_power_efficient_wq, + &voicehat->enable_sdmode_work, + msecs_to_jiffies(voicehat->sdmode_delay)); + } + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + if (dai->playback_active) { + cancel_delayed_work(&voicehat->enable_sdmode_work); + dev_info(dai->dev, "Disabling audio amp...\n"); + gpiod_set_value(voicehat->sdmode_gpio, 0); + } + break; + } + return 0; +} + +static const struct snd_soc_dai_ops voicehat_dai_ops = { + .trigger = voicehat_daiops_trigger, +}; + +static struct snd_soc_dai_driver voicehat_dai = { + .name = "voicehat-hifi", + .capture = {.stream_name = "HiFi Capture", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S32_LE}, + .playback = {.stream_name = "HiFi Playback", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S32_LE}, + .ops = &voicehat_dai_ops, + .symmetric_rates = 1}; + +#ifdef CONFIG_OF +static const struct of_device_id voicehat_ids[] = { + { + .compatible = "google,voicehat", + }, + {}}; +MODULE_DEVICE_TABLE(of, voicehat_ids); +#endif + +static int voicehat_platform_probe(struct platform_device *pdev) { + struct voicehat_priv *voicehat; + int ret; + + voicehat = devm_kzalloc(&pdev->dev, sizeof(*voicehat), GFP_KERNEL); + if (!voicehat) return -ENOMEM; + + ret = device_property_read_u32(&pdev->dev, "voicehat_sdmode_delay", + &voicehat->sdmode_delay); + + if (ret) { + voicehat->sdmode_delay = SDMODE_DELAY_MS; + dev_info(&pdev->dev, + "property 'voicehat_sdmode_delay' not found default 5 mS"); + } else { + dev_info(&pdev->dev, "property 'voicehat_sdmode_delay' found delay= %d mS", + voicehat->sdmode_delay); + } + + dev_set_drvdata(&pdev->dev, voicehat); + + return snd_soc_register_codec(&pdev->dev, &voicehat_codec_driver, &voicehat_dai, 1); +} + +static int voicehat_platform_remove(struct platform_device *pdev) { + snd_soc_unregister_codec(&pdev->dev); + return 0; +} + +static struct platform_driver voicehat_driver = { + .driver = + { + .name = "voicehat-codec", .of_match_table = of_match_ptr(voicehat_ids), + }, + .probe = voicehat_platform_probe, + .remove = voicehat_platform_remove, +}; + +module_platform_driver(voicehat_driver); + +MODULE_DESCRIPTION("Google voiceHAT Codec driver"); +MODULE_AUTHOR("Peter Malkin "); +MODULE_LICENSE("GPL v2"); --- /dev/null +++ b/sound/soc/bcm/googlevoicehat-soundcard.c @@ -0,0 +1,124 @@ +/* + * ASoC Driver for Google voiceHAT SoundCard + * + * Author: Peter Malkin + * Copyright 2016 + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include +#include + +#include +#include +#include +#include +#include + +static int snd_rpi_googlevoicehat_soundcard_init(struct snd_soc_pcm_runtime *rtd) +{ + return 0; +} + +static int snd_rpi_googlevoicehat_soundcard_hw_params( + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + + unsigned int sample_bits = + snd_pcm_format_physical_width(params_format(params)); + + return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2); +} + +/* machine stream operations */ +static struct snd_soc_ops snd_rpi_googlevoicehat_soundcard_ops = { + .hw_params = snd_rpi_googlevoicehat_soundcard_hw_params, +}; + +static struct snd_soc_dai_link snd_rpi_googlevoicehat_soundcard_dai[] = { +{ + .name = "Google voiceHAT SoundCard", + .stream_name = "Google voiceHAT SoundCard HiFi", + .cpu_dai_name = "bcm2708-i2s.0", + .codec_dai_name = "voicehat-hifi", + .platform_name = "bcm2708-i2s.0", + .codec_name = "voicehat-codec", + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBS_CFS, + .ops = &snd_rpi_googlevoicehat_soundcard_ops, + .init = snd_rpi_googlevoicehat_soundcard_init, +}, +}; + +/* audio machine driver */ +static struct snd_soc_card snd_rpi_googlevoicehat_soundcard = { + .name = "snd_rpi_googlevoicehat_soundcard", + .owner = THIS_MODULE, + .dai_link = snd_rpi_googlevoicehat_soundcard_dai, + .num_links = ARRAY_SIZE(snd_rpi_googlevoicehat_soundcard_dai), +}; + +static int snd_rpi_googlevoicehat_soundcard_probe(struct platform_device *pdev) +{ + int ret = 0; + + snd_rpi_googlevoicehat_soundcard.dev = &pdev->dev; + + if (pdev->dev.of_node) { + struct device_node *i2s_node; + struct snd_soc_dai_link *dai = &snd_rpi_googlevoicehat_soundcard_dai[0]; + i2s_node = of_parse_phandle(pdev->dev.of_node, + "i2s-controller", 0); + + if (i2s_node) { + dai->cpu_dai_name = NULL; + dai->cpu_of_node = i2s_node; + dai->platform_name = NULL; + dai->platform_of_node = i2s_node; + } + } + + ret = snd_soc_register_card(&snd_rpi_googlevoicehat_soundcard); + if (ret) + dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret); + + return ret; +} + +static int snd_rpi_googlevoicehat_soundcard_remove(struct platform_device *pdev) +{ + return snd_soc_unregister_card(&snd_rpi_googlevoicehat_soundcard); +} + +static const struct of_device_id snd_rpi_googlevoicehat_soundcard_of_match[] = { + { .compatible = "googlevoicehat,googlevoicehat-soundcard", }, + {}, +}; +MODULE_DEVICE_TABLE(of, snd_rpi_googlevoicehat_soundcard_of_match); + +static struct platform_driver snd_rpi_googlevoicehat_soundcard_driver = { + .driver = { + .name = "snd-googlevoicehat-soundcard", + .owner = THIS_MODULE, + .of_match_table = snd_rpi_googlevoicehat_soundcard_of_match, + }, + .probe = snd_rpi_googlevoicehat_soundcard_probe, + .remove = snd_rpi_googlevoicehat_soundcard_remove, +}; + +module_platform_driver(snd_rpi_googlevoicehat_soundcard_driver); + +MODULE_AUTHOR("Peter Malkin "); +MODULE_DESCRIPTION("ASoC Driver for Google voiceHAT SoundCard"); +MODULE_LICENSE("GPL v2");