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183 lines
5.3 KiB
183 lines
5.3 KiB
/* |
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* ASoC Driver for AudioInjector.net isolated soundcard |
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* |
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* Created on: 20-February-2020 |
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* Author: [email protected] |
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* based on audioinjector-octo-soundcard.c |
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* |
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* Copyright (C) 2020 Flatmax Pty. Ltd. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* version 2 as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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*/ |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/gpio/consumer.h> |
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#include <sound/core.h> |
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#include <sound/soc.h> |
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#include <sound/pcm_params.h> |
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#include <sound/control.h> |
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static struct gpio_desc *mute_gpio; |
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static const unsigned int audioinjector_isolated_rates[] = { |
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192000, 96000, 48000, 32000, 24000, 16000, 8000 |
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}; |
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static struct snd_pcm_hw_constraint_list audioinjector_isolated_constraints = { |
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.list = audioinjector_isolated_rates, |
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.count = ARRAY_SIZE(audioinjector_isolated_rates), |
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}; |
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static int audioinjector_isolated_dai_init(struct snd_soc_pcm_runtime *rtd) |
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{ |
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int ret=snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 24576000, 0); |
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if (ret) |
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return ret; |
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return snd_soc_dai_set_bclk_ratio(asoc_rtd_to_cpu(rtd, 0), 64); |
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} |
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static int audioinjector_isolated_startup(struct snd_pcm_substream *substream) |
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{ |
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snd_pcm_hw_constraint_list(substream->runtime, 0, |
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SNDRV_PCM_HW_PARAM_RATE, &audioinjector_isolated_constraints); |
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return 0; |
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} |
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static int audioinjector_isolated_trigger(struct snd_pcm_substream *substream, |
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int cmd){ |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_STOP: |
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case SNDRV_PCM_TRIGGER_SUSPEND: |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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gpiod_set_value(mute_gpio, 0); |
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break; |
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case SNDRV_PCM_TRIGGER_START: |
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case SNDRV_PCM_TRIGGER_RESUME: |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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gpiod_set_value(mute_gpio, 1); |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static struct snd_soc_ops audioinjector_isolated_ops = { |
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.startup = audioinjector_isolated_startup, |
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.trigger = audioinjector_isolated_trigger, |
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}; |
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SND_SOC_DAILINK_DEFS(audioinjector_isolated, |
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DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")), |
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DAILINK_COMP_ARRAY(COMP_CODEC("cs4271.1-0010", "cs4271-hifi")), |
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DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0"))); |
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static struct snd_soc_dai_link audioinjector_isolated_dai[] = { |
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{ |
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.name = "AudioInjector ISO", |
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.stream_name = "AI-HIFI", |
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.ops = &audioinjector_isolated_ops, |
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.init = audioinjector_isolated_dai_init, |
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.symmetric_rate = 1, |
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.symmetric_channels = 1, |
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.dai_fmt = SND_SOC_DAIFMT_CBM_CFM|SND_SOC_DAIFMT_I2S|SND_SOC_DAIFMT_NB_NF, |
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SND_SOC_DAILINK_REG(audioinjector_isolated), |
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} |
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}; |
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static const struct snd_soc_dapm_widget audioinjector_isolated_widgets[] = { |
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SND_SOC_DAPM_OUTPUT("OUTPUTS"), |
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SND_SOC_DAPM_INPUT("INPUTS"), |
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}; |
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static const struct snd_soc_dapm_route audioinjector_isolated_route[] = { |
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/* Balanced outputs */ |
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{"OUTPUTS", NULL, "AOUTA+"}, |
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{"OUTPUTS", NULL, "AOUTA-"}, |
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{"OUTPUTS", NULL, "AOUTB+"}, |
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{"OUTPUTS", NULL, "AOUTB-"}, |
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/* Balanced inputs */ |
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{"AINA", NULL, "INPUTS"}, |
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{"AINB", NULL, "INPUTS"}, |
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}; |
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static struct snd_soc_card snd_soc_audioinjector_isolated = { |
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.name = "audioinjector-isolated-soundcard", |
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.dai_link = audioinjector_isolated_dai, |
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.num_links = ARRAY_SIZE(audioinjector_isolated_dai), |
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.dapm_widgets = audioinjector_isolated_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(audioinjector_isolated_widgets), |
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.dapm_routes = audioinjector_isolated_route, |
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.num_dapm_routes = ARRAY_SIZE(audioinjector_isolated_route), |
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}; |
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static int audioinjector_isolated_probe(struct platform_device *pdev) |
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{ |
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struct snd_soc_card *card = &snd_soc_audioinjector_isolated; |
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int ret; |
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card->dev = &pdev->dev; |
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if (pdev->dev.of_node) { |
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struct snd_soc_dai_link *dai = &audioinjector_isolated_dai[0]; |
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struct device_node *i2s_node = |
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of_parse_phandle(pdev->dev.of_node, "i2s-controller", 0); |
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if (i2s_node) { |
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dai->cpus->dai_name = NULL; |
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dai->cpus->of_node = i2s_node; |
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dai->platforms->name = NULL; |
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dai->platforms->of_node = i2s_node; |
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} else { |
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dev_err(&pdev->dev, |
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"i2s-controller missing or invalid in DT\n"); |
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return -EINVAL; |
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} |
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mute_gpio = devm_gpiod_get_optional(&pdev->dev, "mute", GPIOD_OUT_LOW); |
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if (IS_ERR(mute_gpio)){ |
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dev_err(&pdev->dev, "mute gpio not found in dt overlay\n"); |
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return PTR_ERR(mute_gpio); |
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} |
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} |
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ret = devm_snd_soc_register_card(&pdev->dev, card); |
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if (ret && ret != -EPROBE_DEFER) |
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dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret); |
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return ret; |
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} |
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static const struct of_device_id audioinjector_isolated_of_match[] = { |
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{ .compatible = "ai,audioinjector-isolated-soundcard", }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, audioinjector_isolated_of_match); |
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static struct platform_driver audioinjector_isolated_driver = { |
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.driver = { |
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.name = "audioinjector-isolated", |
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.owner = THIS_MODULE, |
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.of_match_table = audioinjector_isolated_of_match, |
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}, |
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.probe = audioinjector_isolated_probe, |
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}; |
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module_platform_driver(audioinjector_isolated_driver); |
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MODULE_AUTHOR("Matt Flax <[email protected]>"); |
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MODULE_DESCRIPTION("AudioInjector.net isolated Soundcard"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_ALIAS("platform:audioinjector-isolated-soundcard");
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