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ASoC: Add support for Rpi-DAC
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commit 471833dcece9bd4c02ea4ef5bcf7ba61a36dc544
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- +7 −0 sound/soc/bcm/Kconfig
- +2 −0 sound/soc/bcm/Makefile
- +119 −0 sound/soc/bcm/rpi-dac.c
- +9 −0 sound/soc/codecs/Kconfig
- +2 −0 sound/soc/codecs/Makefile
- +69 −0 sound/soc/codecs/pcm1794a.c
| @@ -0,0 +1,119 @@ | ||
| /* | ||
| * ASoC Driver for RPi-DAC. | ||
| * | ||
| * Author: Florian Meier <florian.meier@koalo.de> | ||
| * Copyright 2013 | ||
| * | ||
| * 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> | ||
|
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| #include <sound/core.h> | ||
| #include <sound/pcm.h> | ||
| #include <sound/pcm_params.h> | ||
| #include <sound/soc.h> | ||
| #include <sound/jack.h> | ||
|
|
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| static int snd_rpi_rpi_dac_init(struct snd_soc_pcm_runtime *rtd) | ||
| { | ||
| return 0; | ||
| } | ||
|
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| static int snd_rpi_rpi_dac_hw_params(struct snd_pcm_substream *substream, | ||
| struct snd_pcm_hw_params *params) | ||
| { | ||
| struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | ||
|
|
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| return snd_soc_dai_set_bclk_ratio(cpu_dai, 32*2); | ||
| } | ||
|
|
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| /* machine stream operations */ | ||
| static struct snd_soc_ops snd_rpi_rpi_dac_ops = { | ||
| .hw_params = snd_rpi_rpi_dac_hw_params, | ||
| }; | ||
|
|
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| static struct snd_soc_dai_link snd_rpi_rpi_dac_dai[] = { | ||
| { | ||
| .name = "RPi-DAC", | ||
| .stream_name = "RPi-DAC HiFi", | ||
| .cpu_dai_name = "bcm2708-i2s.0", | ||
| .codec_dai_name = "pcm1794a-hifi", | ||
| .platform_name = "bcm2708-i2s.0", | ||
| .codec_name = "pcm1794a-codec", | ||
| .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | | ||
| SND_SOC_DAIFMT_CBS_CFS, | ||
| .ops = &snd_rpi_rpi_dac_ops, | ||
| .init = snd_rpi_rpi_dac_init, | ||
| }, | ||
| }; | ||
|
|
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| /* audio machine driver */ | ||
| static struct snd_soc_card snd_rpi_rpi_dac = { | ||
| .name = "snd_rpi_rpi_dac", | ||
| .owner = THIS_MODULE, | ||
| .dai_link = snd_rpi_rpi_dac_dai, | ||
| .num_links = ARRAY_SIZE(snd_rpi_rpi_dac_dai), | ||
| }; | ||
|
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| static int snd_rpi_rpi_dac_probe(struct platform_device *pdev) | ||
| { | ||
| int ret = 0; | ||
|
|
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| snd_rpi_rpi_dac.dev = &pdev->dev; | ||
|
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| if (pdev->dev.of_node) { | ||
| struct device_node *i2s_node; | ||
| struct snd_soc_dai_link *dai = &snd_rpi_rpi_dac_dai[0]; | ||
| 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; | ||
| } | ||
| } | ||
|
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| ret = snd_soc_register_card(&snd_rpi_rpi_dac); | ||
| if (ret) | ||
| dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret); | ||
|
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| return ret; | ||
| } | ||
|
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| static int snd_rpi_rpi_dac_remove(struct platform_device *pdev) | ||
| { | ||
| return snd_soc_unregister_card(&snd_rpi_rpi_dac); | ||
| } | ||
|
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| static const struct of_device_id snd_rpi_rpi_dac_of_match[] = { | ||
| { .compatible = "rpi,rpi-dac", }, | ||
| {}, | ||
| }; | ||
| MODULE_DEVICE_TABLE(of, snd_rpi_rpi_dac_of_match); | ||
|
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| static struct platform_driver snd_rpi_rpi_dac_driver = { | ||
| .driver = { | ||
| .name = "snd-rpi-dac", | ||
| .owner = THIS_MODULE, | ||
| .of_match_table = snd_rpi_rpi_dac_of_match, | ||
| }, | ||
| .probe = snd_rpi_rpi_dac_probe, | ||
| .remove = snd_rpi_rpi_dac_remove, | ||
| }; | ||
|
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| module_platform_driver(snd_rpi_rpi_dac_driver); | ||
|
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| MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>"); | ||
| MODULE_DESCRIPTION("ASoC Driver for RPi-DAC"); | ||
| MODULE_LICENSE("GPL v2"); |
| @@ -0,0 +1,69 @@ | ||
| /* | ||
| * Driver for the PCM1794A codec | ||
| * | ||
| * Author: Florian Meier <florian.meier@koalo.de> | ||
| * Copyright 2013 | ||
| * | ||
| * 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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|
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| #include <linux/init.h> | ||
| #include <linux/module.h> | ||
| #include <linux/platform_device.h> | ||
|
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| #include <sound/soc.h> | ||
|
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| static struct snd_soc_dai_driver pcm1794a_dai = { | ||
| .name = "pcm1794a-hifi", | ||
| .playback = { | ||
| .channels_min = 2, | ||
| .channels_max = 2, | ||
| .rates = SNDRV_PCM_RATE_8000_192000, | ||
| .formats = SNDRV_PCM_FMTBIT_S16_LE | | ||
| SNDRV_PCM_FMTBIT_S24_LE | ||
| }, | ||
| }; | ||
|
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| static struct snd_soc_codec_driver soc_codec_dev_pcm1794a; | ||
|
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| static int pcm1794a_probe(struct platform_device *pdev) | ||
| { | ||
| return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_pcm1794a, | ||
| &pcm1794a_dai, 1); | ||
| } | ||
|
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| static int pcm1794a_remove(struct platform_device *pdev) | ||
| { | ||
| snd_soc_unregister_codec(&pdev->dev); | ||
| return 0; | ||
| } | ||
|
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| static const struct of_device_id pcm1794a_of_match[] = { | ||
| { .compatible = "ti,pcm1794a", }, | ||
| { } | ||
| }; | ||
| MODULE_DEVICE_TABLE(of, pcm1794a_of_match); | ||
|
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| static struct platform_driver pcm1794a_codec_driver = { | ||
| .probe = pcm1794a_probe, | ||
| .remove = pcm1794a_remove, | ||
| .driver = { | ||
| .name = "pcm1794a-codec", | ||
| .owner = THIS_MODULE, | ||
| .of_match_table = of_match_ptr(pcm1794a_of_match), | ||
| }, | ||
| }; | ||
|
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| module_platform_driver(pcm1794a_codec_driver); | ||
|
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| MODULE_DESCRIPTION("ASoC PCM1794A codec driver"); | ||
| MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>"); | ||
| MODULE_LICENSE("GPL v2"); |
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