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189 lines
5.9 KiB
189 lines
5.9 KiB
/* |
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* ASoC Driver for AudioInjector Pi add on soundcard |
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* |
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* Created on: 13-May-2016 |
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* Author: [email protected] |
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* based on code by Cliff Cai <[email protected]> for the ssm2602 machine blackfin. |
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* with help from Lars-Peter Clausen for simplifying the original code to use the dai_fmt field. |
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* i2s_node code taken from the other sound/soc/bcm machine drivers. |
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* |
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* Copyright (C) 2016 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 <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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#include "../codecs/wm8731.h" |
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static const unsigned int bcm2835_rates_12000000[] = { |
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8000, 16000, 32000, 44100, 48000, 96000, 88200, |
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}; |
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static struct snd_pcm_hw_constraint_list bcm2835_constraints_12000000 = { |
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.list = bcm2835_rates_12000000, |
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.count = ARRAY_SIZE(bcm2835_rates_12000000), |
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}; |
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static int snd_audioinjector_pi_soundcard_startup(struct snd_pcm_substream *substream) |
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{ |
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/* Setup constraints, because there is a 12 MHz XTAL on the board */ |
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snd_pcm_hw_constraint_list(substream->runtime, 0, |
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SNDRV_PCM_HW_PARAM_RATE, |
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&bcm2835_constraints_12000000); |
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return 0; |
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} |
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static int snd_audioinjector_pi_soundcard_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params) |
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{ |
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struct snd_soc_pcm_runtime *rtd = substream->private_data; |
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); |
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switch (params_rate(params)){ |
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case 8000: |
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return snd_soc_dai_set_bclk_ratio(cpu_dai, 1); |
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case 16000: |
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return snd_soc_dai_set_bclk_ratio(cpu_dai, 750); |
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case 32000: |
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return snd_soc_dai_set_bclk_ratio(cpu_dai, 375); |
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case 44100: |
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return snd_soc_dai_set_bclk_ratio(cpu_dai, 272); |
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case 48000: |
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return snd_soc_dai_set_bclk_ratio(cpu_dai, 250); |
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case 88200: |
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return snd_soc_dai_set_bclk_ratio(cpu_dai, 136); |
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case 96000: |
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return snd_soc_dai_set_bclk_ratio(cpu_dai, 125); |
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default: |
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return snd_soc_dai_set_bclk_ratio(cpu_dai, 125); |
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} |
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} |
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/* machine stream operations */ |
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static struct snd_soc_ops snd_audioinjector_pi_soundcard_ops = { |
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.startup = snd_audioinjector_pi_soundcard_startup, |
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.hw_params = snd_audioinjector_pi_soundcard_hw_params, |
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}; |
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static int audioinjector_pi_soundcard_dai_init(struct snd_soc_pcm_runtime *rtd) |
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{ |
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return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), WM8731_SYSCLK_XTAL, 12000000, SND_SOC_CLOCK_IN); |
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} |
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SND_SOC_DAILINK_DEFS(audioinjector_pi, |
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DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")), |
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DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.1-001a", "wm8731-hifi")), |
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DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2835-i2s.0"))); |
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static struct snd_soc_dai_link audioinjector_pi_soundcard_dai[] = { |
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{ |
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.name = "AudioInjector audio", |
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.stream_name = "AudioInjector audio", |
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.ops = &snd_audioinjector_pi_soundcard_ops, |
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.init = audioinjector_pi_soundcard_dai_init, |
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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_pi), |
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}, |
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}; |
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static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { |
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SND_SOC_DAPM_HP("Headphone Jack", NULL), |
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SND_SOC_DAPM_SPK("Ext Spk", NULL), |
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SND_SOC_DAPM_LINE("Line In Jacks", NULL), |
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SND_SOC_DAPM_MIC("Microphone", NULL), |
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}; |
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static const struct snd_soc_dapm_route audioinjector_audio_map[] = { |
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/* headphone connected to LHPOUT, RHPOUT */ |
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{"Headphone Jack", NULL, "LHPOUT"}, |
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{"Headphone Jack", NULL, "RHPOUT"}, |
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/* speaker connected to LOUT, ROUT */ |
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{"Ext Spk", NULL, "ROUT"}, |
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{"Ext Spk", NULL, "LOUT"}, |
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/* line inputs */ |
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{"Line In Jacks", NULL, "Line Input"}, |
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/* mic is connected to Mic Jack, with WM8731 Mic Bias */ |
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{"Microphone", NULL, "Mic Bias"}, |
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}; |
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static struct snd_soc_card snd_soc_audioinjector = { |
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.name = "audioinjector-pi-soundcard", |
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.dai_link = audioinjector_pi_soundcard_dai, |
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.num_links = ARRAY_SIZE(audioinjector_pi_soundcard_dai), |
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.dapm_widgets = wm8731_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets), |
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.dapm_routes = audioinjector_audio_map, |
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.num_dapm_routes = ARRAY_SIZE(audioinjector_audio_map), |
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}; |
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static int audioinjector_pi_soundcard_probe(struct platform_device *pdev) |
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{ |
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struct snd_soc_card *card = &snd_soc_audioinjector; |
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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_pi_soundcard_dai[0]; |
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struct device_node *i2s_node = of_parse_phandle(pdev->dev.of_node, |
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"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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if (!dai->cpus->of_node) { |
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dev_err(&pdev->dev, "Property 'i2s-controller' missing or invalid\n"); |
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return -EINVAL; |
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} |
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} |
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if ((ret = devm_snd_soc_register_card(&pdev->dev, card))) |
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return dev_err_probe(&pdev->dev, ret, "%s\n", __func__); |
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dev_info(&pdev->dev, "successfully loaded\n"); |
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return ret; |
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} |
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static const struct of_device_id audioinjector_pi_soundcard_of_match[] = { |
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{ .compatible = "ai,audioinjector-pi-soundcard", }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, audioinjector_pi_soundcard_of_match); |
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static struct platform_driver audioinjector_pi_soundcard_driver = { |
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.driver = { |
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.name = "audioinjector-stereo", |
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.owner = THIS_MODULE, |
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.of_match_table = audioinjector_pi_soundcard_of_match, |
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}, |
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.probe = audioinjector_pi_soundcard_probe, |
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}; |
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module_platform_driver(audioinjector_pi_soundcard_driver); |
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MODULE_AUTHOR("Matt Flax <[email protected]>"); |
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MODULE_DESCRIPTION("AudioInjector.net Pi Soundcard"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_ALIAS("platform:audioinjector-pi-soundcard"); |
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