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Merge pull request raspberrypi#1476 from flatmax/rpi-4.4.y
New driver for the AudioInjector audio input and output card
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39 changes: 39 additions & 0 deletions
39
arch/arm/boot/dts/overlays/audioinjector-wm8731-audio-overlay.dts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| // Definitions for audioinjector.net audio add on soundcard | ||
| /dts-v1/; | ||
| /plugin/; | ||
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| / { | ||
| compatible = "brcm,bcm2708"; | ||
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| fragment@0 { | ||
| target = <&i2s>; | ||
| __overlay__ { | ||
| status = "okay"; | ||
| }; | ||
| }; | ||
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| fragment@1 { | ||
| target = <&i2c1>; | ||
| __overlay__ { | ||
| #address-cells = <1>; | ||
| #size-cells = <0>; | ||
| status = "okay"; | ||
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| wm8731@1a { | ||
| #sound-dai-cells = <0>; | ||
| compatible = "wlf,wm8731"; | ||
| reg = <0x1a>; | ||
| status = "okay"; | ||
| }; | ||
| }; | ||
| }; | ||
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| fragment@2 { | ||
| target = <&sound>; | ||
| __overlay__ { | ||
| compatible = "ai,audioinjector-pi-soundcard"; | ||
| i2s-controller = <&i2s>; | ||
| status = "okay"; | ||
| }; | ||
| }; | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,142 @@ | ||
| /* | ||
| * ASoC Driver for AudioInjector Pi add on soundcard | ||
| * | ||
| * Created on: 13-May-2016 | ||
| * Author: flatmax@flatmax.org | ||
| * based on code by Cliff Cai <Cliff.Cai@analog.com> for the ssm2602 machine blackfin. | ||
| * with help from Lars-Peter Clausen for simplifying the original code to use the dai_fmt field. | ||
| * i2s_node code taken from the other sound/soc/bcm machine drivers. | ||
| * | ||
| * Copyright (C) 2016 Flatmax Pty. Ltd. | ||
| * | ||
| * 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. | ||
| */ | ||
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| #include <linux/module.h> | ||
| #include <linux/types.h> | ||
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| #include <sound/core.h> | ||
| #include <sound/soc.h> | ||
| #include <sound/pcm_params.h> | ||
| #include <sound/control.h> | ||
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| #include "../codecs/wm8731.h" | ||
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| static int audioinjector_pi_soundcard_dai_init(struct snd_soc_pcm_runtime *rtd) | ||
| { | ||
| struct snd_soc_dapm_context *dapm = &rtd->card->dapm; | ||
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| // not connected | ||
| snd_soc_dapm_nc_pin(dapm, "Mic Bias"); | ||
| snd_soc_dapm_nc_pin(dapm, "MICIN"); | ||
| snd_soc_dapm_nc_pin(dapm, "RHPOUT"); | ||
| snd_soc_dapm_nc_pin(dapm, "LHPOUT"); | ||
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| return snd_soc_dai_set_sysclk(rtd->codec_dai, WM8731_SYSCLK_XTAL, 12000000, SND_SOC_CLOCK_IN); | ||
| } | ||
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| static struct snd_soc_dai_link audioinjector_pi_soundcard_dai[] = { | ||
| { | ||
| .name = "AudioInjector audio", | ||
| .stream_name = "AudioInjector audio", | ||
| .cpu_dai_name = "bcm2708-i2s.0", | ||
| .codec_dai_name = "wm8731-hifi", | ||
| .platform_name = "bcm2835-i2s.0", | ||
| .codec_name = "wm8731.1-001a", | ||
| .init = audioinjector_pi_soundcard_dai_init, | ||
| .dai_fmt = SND_SOC_DAIFMT_CBM_CFM|SND_SOC_DAIFMT_I2S|SND_SOC_DAIFMT_NB_NF, | ||
| }, | ||
| }; | ||
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| static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { | ||
| SND_SOC_DAPM_SPK("Ext Spk", NULL), | ||
| SND_SOC_DAPM_LINE("Line In Jacks", NULL), | ||
| }; | ||
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| /* Corgi machine connections to the codec pins */ | ||
| static const struct snd_soc_dapm_route audioinjector_audio_map[] = { | ||
| /* speaker connected to LOUT, ROUT */ | ||
| {"Ext Spk", NULL, "ROUT"}, | ||
| {"Ext Spk", NULL, "LOUT"}, | ||
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| /* line inputs */ | ||
| {"Line In Jacks", NULL, "Line Input"}, | ||
| }; | ||
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| static struct snd_soc_card snd_soc_audioinjector = { | ||
| .name = "audioinjector-pi-soundcard", | ||
| .dai_link = audioinjector_pi_soundcard_dai, | ||
| .num_links = 1, | ||
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| .dapm_widgets = wm8731_dapm_widgets, | ||
| .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets), | ||
| .dapm_routes = audioinjector_audio_map, | ||
| .num_dapm_routes = ARRAY_SIZE(audioinjector_audio_map), | ||
| }; | ||
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| static int audioinjector_pi_soundcard_probe(struct platform_device *pdev) | ||
| { | ||
| struct snd_soc_card *card = &snd_soc_audioinjector; | ||
| int ret; | ||
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| card->dev = &pdev->dev; | ||
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| if (pdev->dev.of_node) { | ||
| struct snd_soc_dai_link *dai = &audioinjector_pi_soundcard_dai[0]; | ||
| struct device_node *i2s_node = of_parse_phandle(pdev->dev.of_node, | ||
| "i2s-controller", 0); | ||
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| if (i2s_node) { | ||
| dai->cpu_dai_name = NULL; | ||
| dai->cpu_of_node = i2s_node; | ||
| dai->platform_name = NULL; | ||
| dai->platform_of_node = i2s_node; | ||
| } else | ||
| if (!dai->cpu_of_node) { | ||
| dev_err(&pdev->dev, "Property 'i2s-controller' missing or invalid\n"); | ||
| return -EINVAL; | ||
| } | ||
| } | ||
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| if ((ret = snd_soc_register_card(card))) { | ||
| dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret); | ||
| } | ||
| return ret; | ||
| } | ||
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| static int audioinjector_pi_soundcard_remove(struct platform_device *pdev) | ||
| { | ||
| struct snd_soc_card *card = platform_get_drvdata(pdev); | ||
| return snd_soc_unregister_card(card); | ||
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| } | ||
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| static const struct of_device_id audioinjector_pi_soundcard_of_match[] = { | ||
| { .compatible = "ai,audioinjector-pi-soundcard", }, | ||
| {}, | ||
| }; | ||
| MODULE_DEVICE_TABLE(of, audioinjector_pi_soundcard_of_match); | ||
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| static struct platform_driver audioinjector_pi_soundcard_driver = { | ||
| .driver = { | ||
| .name = "audioinjector-audio", | ||
| .owner = THIS_MODULE, | ||
| .of_match_table = audioinjector_pi_soundcard_of_match, | ||
| }, | ||
| .probe = audioinjector_pi_soundcard_probe, | ||
| .remove = audioinjector_pi_soundcard_remove, | ||
| }; | ||
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| module_platform_driver(audioinjector_pi_soundcard_driver); | ||
| MODULE_AUTHOR("Matt Flax <flatmax@flatmax.org>"); | ||
| MODULE_DESCRIPTION("AudioInjector.net Pi Soundcard"); | ||
| MODULE_LICENSE("GPL v2"); | ||
| MODULE_ALIAS("platform:audioinjector-pi-soundcard"); | ||
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