ASoC: Add driver for PROTO Audio CODEC (with a WM8731)
Add support for the MikroElektronika PROTO audio codec board. URL to the audio chip: http://www.mikroe.com/add-on-boards/audio-voice/audio-codec-proto/ Signed-off-by: Florian Meier <florian.meier@koalo.de> Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -97,4 +97,15 @@ config SND_ATMEL_SOC_I2S
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help
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help
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Say Y or M if you want to add support for Atmel ASoc driver for boards
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Say Y or M if you want to add support for Atmel ASoc driver for boards
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using I2S.
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using I2S.
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config SND_SOC_MIKROE_PROTO
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tristate "Support for Mikroe-PROTO board"
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depends on OF
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select SND_SOC_WM8731
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help
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Say Y or M if you want to add support for MikroElektronika PROTO Audio
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Board. This board contains the WM8731 codec, which can be configured
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using I2C over SDA (MPU Data Input) and SCL (MPU Clock Input) pins.
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Both playback and capture are supported.
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endif
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endif
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@ -17,6 +17,7 @@ snd-soc-sam9x5-wm8731-objs := sam9x5_wm8731.o
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snd-atmel-soc-classd-objs := atmel-classd.o
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snd-atmel-soc-classd-objs := atmel-classd.o
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snd-atmel-soc-pdmic-objs := atmel-pdmic.o
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snd-atmel-soc-pdmic-objs := atmel-pdmic.o
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snd-atmel-soc-tse850-pcm5142-objs := tse850-pcm5142.o
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snd-atmel-soc-tse850-pcm5142-objs := tse850-pcm5142.o
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snd-soc-mikroe-proto-objs := mikroe-proto.o
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obj-$(CONFIG_SND_AT91_SOC_SAM9G20_WM8731) += snd-soc-sam9g20-wm8731.o
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obj-$(CONFIG_SND_AT91_SOC_SAM9G20_WM8731) += snd-soc-sam9g20-wm8731.o
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obj-$(CONFIG_SND_ATMEL_SOC_WM8904) += snd-atmel-soc-wm8904.o
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obj-$(CONFIG_SND_ATMEL_SOC_WM8904) += snd-atmel-soc-wm8904.o
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@ -24,3 +25,4 @@ obj-$(CONFIG_SND_AT91_SOC_SAM9X5_WM8731) += snd-soc-sam9x5-wm8731.o
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obj-$(CONFIG_SND_ATMEL_SOC_CLASSD) += snd-atmel-soc-classd.o
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obj-$(CONFIG_SND_ATMEL_SOC_CLASSD) += snd-atmel-soc-classd.o
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obj-$(CONFIG_SND_ATMEL_SOC_PDMIC) += snd-atmel-soc-pdmic.o
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obj-$(CONFIG_SND_ATMEL_SOC_PDMIC) += snd-atmel-soc-pdmic.o
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obj-$(CONFIG_SND_ATMEL_SOC_TSE850_PCM5142) += snd-atmel-soc-tse850-pcm5142.o
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obj-$(CONFIG_SND_ATMEL_SOC_TSE850_PCM5142) += snd-atmel-soc-tse850-pcm5142.o
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obj-$(CONFIG_SND_SOC_MIKROE_PROTO) += snd-soc-mikroe-proto.o
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@ -0,0 +1,165 @@
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/*
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* ASoC driver for PROTO AudioCODEC (with a WM8731)
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*
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* Author: Florian Meier, <koalo@koalo.de>
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* Copyright 2013
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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 <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/jack.h>
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#include "../codecs/wm8731.h"
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#define XTAL_RATE 12288000 /* This is fixed on this board */
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static int snd_proto_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_soc_card *card = rtd->card;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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/* Set proto sysclk */
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int ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
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XTAL_RATE, SND_SOC_CLOCK_IN);
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if (ret < 0) {
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dev_err(card->dev, "Failed to set WM8731 SYSCLK: %d\n",
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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 const struct snd_soc_dapm_widget snd_proto_widget[] = {
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SND_SOC_DAPM_MIC("Microphone Jack", NULL),
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SND_SOC_DAPM_HP("Headphone Jack", NULL),
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};
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static const struct snd_soc_dapm_route snd_proto_route[] = {
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/* speaker connected to LHPOUT/RHPOUT */
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{"Headphone Jack", NULL, "LHPOUT"},
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{"Headphone Jack", NULL, "RHPOUT"},
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/* mic is connected to Mic Jack, with WM8731 Mic Bias */
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{"MICIN", NULL, "Mic Bias"},
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{"Mic Bias", NULL, "Microphone Jack"},
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};
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/* audio machine driver */
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static struct snd_soc_card snd_proto = {
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.name = "snd_mikroe_proto",
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.owner = THIS_MODULE,
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.dapm_widgets = snd_proto_widget,
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.num_dapm_widgets = ARRAY_SIZE(snd_proto_widget),
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.dapm_routes = snd_proto_route,
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.num_dapm_routes = ARRAY_SIZE(snd_proto_route),
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};
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static int snd_proto_probe(struct platform_device *pdev)
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{
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struct snd_soc_dai_link *dai;
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struct device_node *np = pdev->dev.of_node;
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struct device_node *codec_np, *cpu_np;
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struct device_node *bitclkmaster = NULL;
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struct device_node *framemaster = NULL;
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unsigned int dai_fmt;
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int ret = 0;
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if (!np) {
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dev_err(&pdev->dev, "No device node supplied\n");
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return -EINVAL;
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}
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snd_proto.dev = &pdev->dev;
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ret = snd_soc_of_parse_card_name(&snd_proto, "model");
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if (ret)
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return ret;
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dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
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if (!dai)
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return -ENOMEM;
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snd_proto.dai_link = dai;
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snd_proto.num_links = 1;
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dai->name = "WM8731";
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dai->stream_name = "WM8731 HiFi";
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dai->codec_dai_name = "wm8731-hifi";
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dai->init = &snd_proto_init;
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codec_np = of_parse_phandle(np, "audio-codec", 0);
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if (!codec_np) {
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dev_err(&pdev->dev, "audio-codec node missing\n");
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return -EINVAL;
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}
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dai->codec_of_node = codec_np;
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cpu_np = of_parse_phandle(np, "i2s-controller", 0);
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if (!cpu_np) {
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dev_err(&pdev->dev, "i2s-controller missing\n");
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return -EINVAL;
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}
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dai->cpu_of_node = cpu_np;
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dai->platform_of_node = cpu_np;
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dai_fmt = snd_soc_of_parse_daifmt(np, NULL,
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&bitclkmaster, &framemaster);
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if (bitclkmaster != framemaster) {
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dev_err(&pdev->dev, "Must be the same bitclock and frame master\n");
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return -EINVAL;
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}
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if (bitclkmaster) {
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dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
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if (codec_np == bitclkmaster)
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dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
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else
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dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
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}
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of_node_put(bitclkmaster);
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of_node_put(framemaster);
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dai->dai_fmt = dai_fmt;
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of_node_put(codec_np);
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of_node_put(cpu_np);
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ret = snd_soc_register_card(&snd_proto);
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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 snd_proto_remove(struct platform_device *pdev)
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{
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return snd_soc_unregister_card(&snd_proto);
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}
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static const struct of_device_id snd_proto_of_match[] = {
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{ .compatible = "mikroe,mikroe-proto", },
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{},
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};
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MODULE_DEVICE_TABLE(of, snd_proto_of_match);
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static struct platform_driver snd_proto_driver = {
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.driver = {
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.name = "snd-mikroe-proto",
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.of_match_table = snd_proto_of_match,
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},
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.probe = snd_proto_probe,
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.remove = snd_proto_remove,
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};
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module_platform_driver(snd_proto_driver);
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MODULE_AUTHOR("Florian Meier");
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MODULE_DESCRIPTION("ASoC Driver for PROTO board (WM8731)");
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MODULE_LICENSE("GPL");
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