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248 lines
6.8 KiB
248 lines
6.8 KiB
/* |
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* ASoC Driver for AudioSense add on soundcard |
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* Author: |
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* Bhargav A K <[email protected]> |
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* Copyright 2017 |
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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/platform_device.h> |
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#include <linux/clk.h> |
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#include <linux/i2c.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include <sound/jack.h> |
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#include <sound/control.h> |
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#include <sound/tlv320aic32x4.h> |
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#include "../codecs/tlv320aic32x4.h" |
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#define AIC32X4_SYSCLK_XTAL 0x00 |
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/* |
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* Setup Codec Sample Rates and Channels |
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* Supported Rates: |
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* 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, 88200, 96000, |
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*/ |
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static const unsigned int audiosense_pi_rate[] = { |
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48000, |
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}; |
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static struct snd_pcm_hw_constraint_list audiosense_constraints_rates = { |
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.list = audiosense_pi_rate, |
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.count = ARRAY_SIZE(audiosense_pi_rate), |
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}; |
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static const unsigned int audiosense_pi_channels[] = { |
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2, |
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}; |
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static struct snd_pcm_hw_constraint_list audiosense_constraints_ch = { |
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.count = ARRAY_SIZE(audiosense_pi_channels), |
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.list = audiosense_pi_channels, |
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.mask = 0, |
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}; |
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/* Setup DAPM widgets and paths */ |
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static const struct snd_soc_dapm_widget audiosense_pi_dapm_widgets[] = { |
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SND_SOC_DAPM_HP("Headphone Jack", NULL), |
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SND_SOC_DAPM_LINE("Line Out", NULL), |
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SND_SOC_DAPM_LINE("Line In", NULL), |
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SND_SOC_DAPM_INPUT("CM_L"), |
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SND_SOC_DAPM_INPUT("CM_R"), |
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}; |
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static const struct snd_soc_dapm_route audiosense_pi_audio_map[] = { |
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/* Line Inputs are connected to |
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* (IN1_L | IN1_R) |
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* (IN2_L | IN2_R) |
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* (IN3_L | IN3_R) |
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*/ |
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{"IN1_L", NULL, "Line In"}, |
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{"IN1_R", NULL, "Line In"}, |
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{"IN2_L", NULL, "Line In"}, |
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{"IN2_R", NULL, "Line In"}, |
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{"IN3_L", NULL, "Line In"}, |
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{"IN3_R", NULL, "Line In"}, |
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/* Mic is connected to IN2_L and IN2_R */ |
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{"Left ADC", NULL, "Mic Bias"}, |
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{"Right ADC", NULL, "Mic Bias"}, |
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/* Headphone connected to HPL, HPR */ |
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{"Headphone Jack", NULL, "HPL"}, |
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{"Headphone Jack", NULL, "HPR"}, |
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/* Speakers connected to LOL and LOR */ |
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{"Line Out", NULL, "LOL"}, |
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{"Line Out", NULL, "LOR"}, |
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}; |
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static int audiosense_pi_card_init(struct snd_soc_pcm_runtime *rtd) |
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{ |
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/* TODO: init of the codec specific dapm data, ignore suspend/resume */ |
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struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component; |
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snd_soc_component_update_bits(component, AIC32X4_MICBIAS, 0x78, |
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AIC32X4_MICBIAS_LDOIN | |
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AIC32X4_MICBIAS_2075V); |
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snd_soc_component_update_bits(component, AIC32X4_PWRCFG, 0x08, |
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AIC32X4_AVDDWEAKDISABLE); |
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snd_soc_component_update_bits(component, AIC32X4_LDOCTL, 0x01, |
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AIC32X4_LDOCTLEN); |
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return 0; |
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} |
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static int audiosense_pi_card_hw_params( |
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struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params) |
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{ |
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int ret = 0; |
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struct snd_soc_pcm_runtime *rtd = substream->private_data; |
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); |
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/* Set the codec system clock, there is a 12 MHz XTAL on the board */ |
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ret = snd_soc_dai_set_sysclk(codec_dai, AIC32X4_SYSCLK_XTAL, |
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12000000, SND_SOC_CLOCK_IN); |
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if (ret) { |
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dev_err(rtd->card->dev, |
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"could not set codec driver clock params\n"); |
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return ret; |
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} |
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return 0; |
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} |
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static int audiosense_pi_card_startup(struct snd_pcm_substream *substream) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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/* |
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* Set codec to 48Khz Sampling, Stereo I/O and 16 bit audio |
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*/ |
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runtime->hw.channels_max = 2; |
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snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
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&audiosense_constraints_ch); |
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runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE; |
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snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16); |
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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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&audiosense_constraints_rates); |
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return 0; |
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} |
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static struct snd_soc_ops audiosense_pi_card_ops = { |
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.startup = audiosense_pi_card_startup, |
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.hw_params = audiosense_pi_card_hw_params, |
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}; |
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SND_SOC_DAILINK_DEFS(audiosense_pi, |
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DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")), |
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DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic32x4.1-0018", "tlv320aic32x4-hifi")), |
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DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0"))); |
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static struct snd_soc_dai_link audiosense_pi_card_dai[] = { |
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{ |
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.name = "TLV320AIC3204 Audio", |
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.stream_name = "TLV320AIC3204 Hifi Audio", |
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | |
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SND_SOC_DAIFMT_CBM_CFM, |
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.ops = &audiosense_pi_card_ops, |
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.init = audiosense_pi_card_init, |
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SND_SOC_DAILINK_REG(audiosense_pi), |
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}, |
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}; |
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static struct snd_soc_card audiosense_pi_card = { |
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.name = "audiosense-pi", |
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.driver_name = "audiosense-pi", |
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.dai_link = audiosense_pi_card_dai, |
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.owner = THIS_MODULE, |
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.num_links = ARRAY_SIZE(audiosense_pi_card_dai), |
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.dapm_widgets = audiosense_pi_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(audiosense_pi_dapm_widgets), |
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.dapm_routes = audiosense_pi_audio_map, |
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.num_dapm_routes = ARRAY_SIZE(audiosense_pi_audio_map), |
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}; |
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static int audiosense_pi_card_probe(struct platform_device *pdev) |
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{ |
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int ret = 0; |
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struct snd_soc_card *card = &audiosense_pi_card; |
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struct snd_soc_dai_link *dai = &audiosense_pi_card_dai[0]; |
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struct device_node *i2s_node = pdev->dev.of_node; |
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card->dev = &pdev->dev; |
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if (!dai) { |
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dev_err(&pdev->dev, "DAI not found. Missing or Invalid\n"); |
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return -EINVAL; |
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} |
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i2s_node = of_parse_phandle(pdev->dev.of_node, "i2s-controller", 0); |
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if (!i2s_node) { |
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dev_err(&pdev->dev, |
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"Property 'i2s-controller' missing or invalid\n"); |
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return -EINVAL; |
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} |
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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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of_node_put(i2s_node); |
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ret = snd_soc_register_card(card); |
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if (ret && ret != -EPROBE_DEFER) |
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dev_err(&pdev->dev, |
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"snd_soc_register_card() failed: %d\n", ret); |
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return ret; |
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} |
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static int audiosense_pi_card_remove(struct platform_device *pdev) |
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{ |
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struct snd_soc_card *card = platform_get_drvdata(pdev); |
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snd_soc_unregister_card(card); |
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return 0; |
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} |
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static const struct of_device_id audiosense_pi_card_of_match[] = { |
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{ .compatible = "as,audiosense-pi", }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, audiosense_pi_card_of_match); |
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static struct platform_driver audiosense_pi_card_driver = { |
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.driver = { |
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.name = "audiosense-snd-card", |
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.owner = THIS_MODULE, |
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.of_match_table = audiosense_pi_card_of_match, |
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}, |
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.probe = audiosense_pi_card_probe, |
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.remove = audiosense_pi_card_remove, |
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}; |
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module_platform_driver(audiosense_pi_card_driver); |
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MODULE_AUTHOR("Bhargav AK <[email protected]>"); |
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MODULE_DESCRIPTION("ASoC Driver for TLV320AIC3204 Audio"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_ALIAS("platform:audiosense-pi"); |
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