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Add support for Fe-Pi audio sound card. (#1867)
Fe-Pi Audio Sound Card is based on NXP SGTL5000 codec. Mechanical specification of the board is the same the Raspberry Pi Zero. 3.5mm jacks for Headphone/Mic, Line In, and Line Out. Signed-off-by: Henry Kupis <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| // Definitions for Fe-Pi Audio | ||
| /dts-v1/; | ||
| /plugin/; | ||
|
|
||
| / { | ||
| compatible = "brcm,bcm2708"; | ||
|
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| fragment@0 { | ||
| target = <&clocks>; | ||
| __overlay__ { | ||
| sgtl5000_mclk: sgtl5000_mclk { | ||
| compatible = "fixed-clock"; | ||
| #clock-cells = <0>; | ||
| clock-frequency = <12288000>; | ||
| clock-output-names = "sgtl5000-mclk"; | ||
| }; | ||
| }; | ||
| }; | ||
|
|
||
| fragment@1 { | ||
| target = <&soc>; | ||
| __overlay__ { | ||
| reg_1v8: reg_1v8@0 { | ||
| compatible = "regulator-fixed"; | ||
| regulator-name = "1V8"; | ||
| regulator-min-microvolt = <1800000>; | ||
| regulator-max-microvolt = <1800000>; | ||
| regulator-always-on; | ||
| }; | ||
| }; | ||
| }; | ||
|
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||
| fragment@2 { | ||
| target = <&i2c1>; | ||
| __overlay__ { | ||
| #address-cells = <1>; | ||
| #size-cells = <0>; | ||
| status = "okay"; | ||
|
|
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| sgtl5000@0a { | ||
| #sound-dai-cells = <0>; | ||
| compatible = "fepi,sgtl5000"; | ||
| reg = <0x0a>; | ||
| clocks = <&sgtl5000_mclk>; | ||
| micbias-resistor-k-ohms = <2>; | ||
| micbias-voltage-m-volts = <3000>; | ||
| VDDA-supply = <&vdd_3v3_reg>; | ||
| VDDIO-supply = <&vdd_3v3_reg>; | ||
| VDDD-supply = <®_1v8>; | ||
| status = "okay"; | ||
| }; | ||
| }; | ||
| }; | ||
|
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||
| fragment@3 { | ||
| target = <&i2s>; | ||
| __overlay__ { | ||
| status = "okay"; | ||
| }; | ||
| }; | ||
|
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| fragment@4 { | ||
| target = <&sound>; | ||
| __overlay__ { | ||
| compatible = "fe-pi,fe-pi-audio"; | ||
| i2s-controller = <&i2s>; | ||
| status = "okay"; | ||
| }; | ||
| }; | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| /* | ||
| * ASoC Driver for Fe-Pi Audio Sound Card | ||
| * | ||
| * Author: Henry Kupis <[email protected]> | ||
| * Copyright 2016 | ||
| * based on code by Florian Meier <[email protected]> | ||
| * based on code by Shawn Guo <[email protected]> | ||
| * | ||
| * 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" | ||
|
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| static int snd_fe_pi_audio_init(struct snd_soc_pcm_runtime *rtd) | ||
| { | ||
| struct snd_soc_card *card = rtd->card; | ||
| struct snd_soc_codec *codec = rtd->codec; | ||
|
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| 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_update_bits(codec, SGTL5000_CHIP_ANA_POWER, | ||
| SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP); | ||
|
|
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| return 0; | ||
| } | ||
|
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| 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 = rtd->codec_dai; | ||
|
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| int ret; | ||
|
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| /* 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; | ||
| } | ||
|
|
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| return 0; | ||
| } | ||
|
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|
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| static struct snd_soc_ops snd_fe_pi_audio_ops = { | ||
| .hw_params = snd_fe_pi_audio_hw_params, | ||
| }; | ||
|
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| static struct snd_soc_dai_link snd_fe_pi_audio_dai[] = { | ||
| { | ||
| .name = "FE-PI", | ||
| .stream_name = "Fe-Pi HiFi", | ||
| .cpu_dai_name = "bcm2708-i2s.0", | ||
| .codec_dai_name = "sgtl5000", | ||
| .platform_name = "bcm2708-i2s.0", | ||
| .codec_name = "sgtl5000.1-000a", | ||
| .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, | ||
| }, | ||
| }; | ||
|
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| static const struct snd_soc_dapm_route fe_pi_audio_dapm_routes[] = { | ||
| {"ADC", NULL, "Mic Bias"}, | ||
| }; | ||
|
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|
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| 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), | ||
|
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| .dapm_routes = fe_pi_audio_dapm_routes, | ||
| .num_dapm_routes = ARRAY_SIZE(fe_pi_audio_dapm_routes), | ||
| }; | ||
|
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| 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]; | ||
|
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| fe_pi_audio.dev = &pdev->dev; | ||
|
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| 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->cpu_dai_name = NULL; | ||
| dai->cpu_of_node = i2s_node; | ||
| dai->platform_name = NULL; | ||
| dai->platform_of_node = i2s_node; | ||
|
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| of_node_put(i2s_node); | ||
|
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| card->dev = &pdev->dev; | ||
| platform_set_drvdata(pdev, card); | ||
|
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| ret = snd_soc_register_card(card); | ||
| if (ret && ret != -EPROBE_DEFER) | ||
| dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret); | ||
|
|
||
| return ret; | ||
| } | ||
|
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| static int snd_fe_pi_audio_remove(struct platform_device *pdev) | ||
| { | ||
| return snd_soc_unregister_card(&fe_pi_audio); | ||
| } | ||
|
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| 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); | ||
|
|
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| 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, | ||
| .remove = snd_fe_pi_audio_remove, | ||
| }; | ||
|
|
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| module_platform_driver(snd_fe_pi_audio_driver); | ||
|
|
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| MODULE_AUTHOR("Henry Kupis <[email protected]>"); | ||
| MODULE_DESCRIPTION("ASoC Driver for Fe-Pi Audio"); | ||
| MODULE_LICENSE("GPL v2"); |