diff options
Diffstat (limited to 'sound/soc/bcm/fe-pi-audio.c')
| -rw-r--r-- | sound/soc/bcm/fe-pi-audio.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/sound/soc/bcm/fe-pi-audio.c b/sound/soc/bcm/fe-pi-audio.c new file mode 100644 index 000000000000..ded4ba1a2815 --- /dev/null +++ b/sound/soc/bcm/fe-pi-audio.c @@ -0,0 +1,154 @@ +/* + * ASoC Driver for Fe-Pi Audio Sound Card + * + * Author: Henry Kupis <kuupaz@gmail.com> + * Copyright 2016 + * based on code by Florian Meier <florian.meier@koalo.de> + * based on code by Shawn Guo <shawn.guo@linaro.org> + * + * 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 <linux/module.h> +#include <linux/platform_device.h> +#include <linux/io.h> + +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/jack.h> + +#include "../codecs/sgtl5000.h" + +static int snd_fe_pi_audio_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_card *card = rtd->card; + struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component; + + snd_soc_dapm_force_enable_pin(&card->dapm, "LO"); + snd_soc_dapm_force_enable_pin(&card->dapm, "ADC"); + snd_soc_dapm_force_enable_pin(&card->dapm, "DAC"); + snd_soc_dapm_force_enable_pin(&card->dapm, "HP"); + snd_soc_component_update_bits(component, SGTL5000_CHIP_ANA_POWER, + SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP); + + return 0; +} + +static int snd_fe_pi_audio_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct device *dev = rtd->card->dev; + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); + + int ret; + + /* Set SGTL5000's SYSCLK */ + ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, 12288000, SND_SOC_CLOCK_IN); + if (ret) { + dev_err(dev, "could not set codec driver clock params\n"); + return ret; + } + + return 0; +} + + +static struct snd_soc_ops snd_fe_pi_audio_ops = { + .hw_params = snd_fe_pi_audio_hw_params, +}; + +SND_SOC_DAILINK_DEFS(fe_pi, + DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")), + DAILINK_COMP_ARRAY(COMP_CODEC("sgtl5000.1-000a", "sgtl5000")), + DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0"))); + +static struct snd_soc_dai_link snd_fe_pi_audio_dai[] = { + { + .name = "FE-PI", + .stream_name = "Fe-Pi HiFi", + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM, + .ops = &snd_fe_pi_audio_ops, + .init = snd_fe_pi_audio_init, + SND_SOC_DAILINK_REG(fe_pi), + }, +}; + +static const struct snd_soc_dapm_route fe_pi_audio_dapm_routes[] = { + {"ADC", NULL, "Mic Bias"}, +}; + + +static struct snd_soc_card fe_pi_audio = { + .name = "Fe-Pi Audio", + .owner = THIS_MODULE, + .dai_link = snd_fe_pi_audio_dai, + .num_links = ARRAY_SIZE(snd_fe_pi_audio_dai), + + .dapm_routes = fe_pi_audio_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(fe_pi_audio_dapm_routes), +}; + +static int snd_fe_pi_audio_probe(struct platform_device *pdev) +{ + int ret = 0; + struct snd_soc_card *card = &fe_pi_audio; + struct device_node *np = pdev->dev.of_node; + struct device_node *i2s_node; + struct snd_soc_dai_link *dai = &snd_fe_pi_audio_dai[0]; + + fe_pi_audio.dev = &pdev->dev; + + i2s_node = of_parse_phandle(np, "i2s-controller", 0); + if (!i2s_node) { + dev_err(&pdev->dev, "i2s_node phandle missing or invalid\n"); + return -EINVAL; + } + + dai->cpus->dai_name = NULL; + dai->cpus->of_node = i2s_node; + dai->platforms->name = NULL; + dai->platforms->of_node = i2s_node; + + of_node_put(i2s_node); + + card->dev = &pdev->dev; + platform_set_drvdata(pdev, card); + + ret = devm_snd_soc_register_card(&pdev->dev, card); + if (ret && ret != -EPROBE_DEFER) + dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret); + + return ret; +} + +static const struct of_device_id snd_fe_pi_audio_of_match[] = { + { .compatible = "fe-pi,fe-pi-audio", }, + {}, +}; +MODULE_DEVICE_TABLE(of, snd_fe_pi_audio_of_match); + +static struct platform_driver snd_fe_pi_audio_driver = { + .driver = { + .name = "snd-fe-pi-audio", + .owner = THIS_MODULE, + .of_match_table = snd_fe_pi_audio_of_match, + }, + .probe = snd_fe_pi_audio_probe, +}; + +module_platform_driver(snd_fe_pi_audio_driver); + +MODULE_AUTHOR("Henry Kupis <fe-pi@cox.net>"); +MODULE_DESCRIPTION("ASoC Driver for Fe-Pi Audio"); +MODULE_LICENSE("GPL v2"); |