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274 lines
7.5 KiB
274 lines
7.5 KiB
/* |
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* ASoC Driver for IQaudIO Raspberry Pi Codec board |
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* |
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* Author: Gordon Garrity <[email protected]> |
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* (C) Copyright IQaudio Limited, 2017-2019 |
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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/gpio/consumer.h> |
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#include <linux/platform_device.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 <linux/acpi.h> |
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#include <linux/slab.h> |
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#include "../codecs/da7213.h" |
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static int pll_out = DA7213_PLL_FREQ_OUT_90316800; |
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static int snd_rpi_iqaudio_pll_control(struct snd_soc_dapm_widget *w, |
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struct snd_kcontrol *k, int event) |
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{ |
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int ret = 0; |
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struct snd_soc_dapm_context *dapm = w->dapm; |
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struct snd_soc_card *card = dapm->card; |
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struct snd_soc_pcm_runtime *rtd = |
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snd_soc_get_pcm_runtime(card, &card->dai_link[0]); |
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); |
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if (SND_SOC_DAPM_EVENT_OFF(event)) { |
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ret = snd_soc_dai_set_pll(codec_dai, 0, DA7213_SYSCLK_MCLK, 0, |
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0); |
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if (ret) |
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dev_err(card->dev, "Failed to bypass PLL: %d\n", ret); |
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/* Allow PLL time to bypass */ |
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msleep(100); |
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} else if (SND_SOC_DAPM_EVENT_ON(event)) { |
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ret = snd_soc_dai_set_pll(codec_dai, 0, DA7213_SYSCLK_PLL, 0, |
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pll_out); |
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if (ret) |
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dev_err(card->dev, "Failed to enable PLL: %d\n", ret); |
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/* Allow PLL time to lock */ |
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msleep(100); |
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} |
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return ret; |
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} |
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static int snd_rpi_iqaudio_post_dapm_event(struct snd_soc_dapm_widget *w, |
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struct snd_kcontrol *kcontrol, |
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int event) |
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{ |
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switch (event) { |
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case SND_SOC_DAPM_POST_PMU: |
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/* Delay for mic bias ramp */ |
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msleep(1000); |
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break; |
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default: |
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break; |
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} |
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return 0; |
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} |
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static const struct snd_kcontrol_new dapm_controls[] = { |
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SOC_DAPM_PIN_SWITCH("HP Jack"), |
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SOC_DAPM_PIN_SWITCH("MIC Jack"), |
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SOC_DAPM_PIN_SWITCH("Onboard MIC"), |
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SOC_DAPM_PIN_SWITCH("AUX Jack"), |
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}; |
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static const struct snd_soc_dapm_widget dapm_widgets[] = { |
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SND_SOC_DAPM_HP("HP Jack", NULL), |
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SND_SOC_DAPM_MIC("MIC Jack", NULL), |
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SND_SOC_DAPM_MIC("Onboard MIC", NULL), |
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SND_SOC_DAPM_LINE("AUX Jack", NULL), |
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SND_SOC_DAPM_SUPPLY("PLL Control", SND_SOC_NOPM, 0, 0, |
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snd_rpi_iqaudio_pll_control, |
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SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), |
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SND_SOC_DAPM_POST("Post Power Up Event", snd_rpi_iqaudio_post_dapm_event), |
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}; |
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static const struct snd_soc_dapm_route audio_map[] = { |
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{"HP Jack", NULL, "HPL"}, |
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{"HP Jack", NULL, "HPR"}, |
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{"HP Jack", NULL, "PLL Control"}, |
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{"AUXR", NULL, "AUX Jack"}, |
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{"AUXL", NULL, "AUX Jack"}, |
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{"AUX Jack", NULL, "PLL Control"}, |
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/* Assume Mic1 is linked to Headset and Mic2 to on-board mic */ |
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{"MIC1", NULL, "MIC Jack"}, |
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{"MIC Jack", NULL, "PLL Control"}, |
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{"MIC2", NULL, "Onboard MIC"}, |
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{"Onboard MIC", NULL, "PLL Control"}, |
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}; |
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/* machine stream operations */ |
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static int snd_rpi_iqaudio_codec_init(struct snd_soc_pcm_runtime *rtd) |
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{ |
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); |
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); |
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int ret; |
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/* |
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* Disable AUX Jack Pin by default to prevent PLL being enabled at |
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* startup. This avoids holding the PLL to a fixed SR config for |
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* subsequent streams. |
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* |
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* This pin can still be enabled later, as required by user-space. |
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*/ |
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snd_soc_dapm_disable_pin(&rtd->card->dapm, "AUX Jack"); |
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snd_soc_dapm_sync(&rtd->card->dapm); |
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/* Set bclk ratio to align with codec's BCLK rate */ |
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ret = snd_soc_dai_set_bclk_ratio(cpu_dai, 64); |
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if (ret) { |
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dev_err(rtd->dev, "Failed to set CPU BLCK ratio\n"); |
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return ret; |
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} |
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/* Set MCLK frequency to codec, onboard 11.2896MHz clock */ |
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return snd_soc_dai_set_sysclk(codec_dai, DA7213_CLKSRC_MCLK, 11289600, |
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SND_SOC_CLOCK_OUT); |
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} |
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static int snd_rpi_iqaudio_codec_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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unsigned int samplerate = params_rate(params); |
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switch (samplerate) { |
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case 8000: |
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case 16000: |
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case 32000: |
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case 48000: |
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case 96000: |
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pll_out = DA7213_PLL_FREQ_OUT_98304000; |
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return 0; |
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case 44100: |
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case 88200: |
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pll_out = DA7213_PLL_FREQ_OUT_90316800; |
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return 0; |
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default: |
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dev_err(rtd->dev,"Unsupported samplerate %d\n", samplerate); |
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return -EINVAL; |
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} |
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} |
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static const struct snd_soc_ops snd_rpi_iqaudio_codec_ops = { |
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.hw_params = snd_rpi_iqaudio_codec_hw_params, |
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}; |
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SND_SOC_DAILINK_DEFS(rpi_iqaudio, |
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DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")), |
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DAILINK_COMP_ARRAY(COMP_CODEC("da7213.1-001a", "da7213-hifi")), |
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DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2835-i2s.0"))); |
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static struct snd_soc_dai_link snd_rpi_iqaudio_codec_dai[] = { |
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{ |
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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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.init = snd_rpi_iqaudio_codec_init, |
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.ops = &snd_rpi_iqaudio_codec_ops, |
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.symmetric_rate = 1, |
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.symmetric_channels = 1, |
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.symmetric_sample_bits = 1, |
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SND_SOC_DAILINK_REG(rpi_iqaudio), |
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}, |
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}; |
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/* audio machine driver */ |
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static struct snd_soc_card snd_rpi_iqaudio_codec = { |
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.owner = THIS_MODULE, |
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.dai_link = snd_rpi_iqaudio_codec_dai, |
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.num_links = ARRAY_SIZE(snd_rpi_iqaudio_codec_dai), |
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.controls = dapm_controls, |
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.num_controls = ARRAY_SIZE(dapm_controls), |
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.dapm_widgets = dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(dapm_widgets), |
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.dapm_routes = audio_map, |
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.num_dapm_routes = ARRAY_SIZE(audio_map), |
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}; |
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static int snd_rpi_iqaudio_codec_probe(struct platform_device *pdev) |
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{ |
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int ret = 0; |
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snd_rpi_iqaudio_codec.dev = &pdev->dev; |
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if (pdev->dev.of_node) { |
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struct device_node *i2s_node; |
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struct snd_soc_card *card = &snd_rpi_iqaudio_codec; |
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struct snd_soc_dai_link *dai = &snd_rpi_iqaudio_codec_dai[0]; |
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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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} |
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if (of_property_read_string(pdev->dev.of_node, "card_name", |
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&card->name)) |
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card->name = "IQaudIOCODEC"; |
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if (of_property_read_string(pdev->dev.of_node, "dai_name", |
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&dai->name)) |
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dai->name = "IQaudIO CODEC"; |
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if (of_property_read_string(pdev->dev.of_node, |
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"dai_stream_name", &dai->stream_name)) |
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dai->stream_name = "IQaudIO CODEC HiFi v1.2"; |
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} |
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ret = snd_soc_register_card(&snd_rpi_iqaudio_codec); |
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if (ret) { |
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if (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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return 0; |
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} |
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static int snd_rpi_iqaudio_codec_remove(struct platform_device *pdev) |
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{ |
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return snd_soc_unregister_card(&snd_rpi_iqaudio_codec); |
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} |
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static const struct of_device_id iqaudio_of_match[] = { |
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{ .compatible = "iqaudio,iqaudio-codec", }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, iqaudio_of_match); |
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static struct platform_driver snd_rpi_iqaudio_codec_driver = { |
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.driver = { |
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.name = "snd-rpi-iqaudio-codec", |
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.owner = THIS_MODULE, |
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.of_match_table = iqaudio_of_match, |
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}, |
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.probe = snd_rpi_iqaudio_codec_probe, |
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.remove = snd_rpi_iqaudio_codec_remove, |
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}; |
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module_platform_driver(snd_rpi_iqaudio_codec_driver); |
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MODULE_AUTHOR("Gordon Garrity <[email protected]>"); |
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MODULE_DESCRIPTION("ASoC Driver for IQaudIO CODEC"); |
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MODULE_LICENSE("GPL v2");
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