ASoC: Add driver for PROTO Audio CODEC (with a WM8731) (a45f8853) · Commits · e / devices / android_kernel_fairphone_FP5

sound/soc/atmel/Kconfig

+11 −0

Original line number	Diff line number	Diff line
		@@ -97,4 +97,15 @@ config SND_ATMEL_SOC_I2S
		help
		Say Y or M if you want to add support for Atmel ASoc driver for boards
		using I2S.

		config SND_SOC_MIKROE_PROTO
		tristate "Support for Mikroe-PROTO board"
		depends on OF
		select SND_SOC_WM8731
		help
		Say Y or M if you want to add support for MikroElektronika PROTO Audio
		Board. This board contains the WM8731 codec, which can be configured
		using I2C over SDA (MPU Data Input) and SCL (MPU Clock Input) pins.
		Both playback and capture are supported.

		endif

sound/soc/atmel/Makefile

+2 −0

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		@@ -17,6 +17,7 @@ snd-soc-sam9x5-wm8731-objs := sam9x5_wm8731.o
		snd-atmel-soc-classd-objs := atmel-classd.o
		snd-atmel-soc-pdmic-objs := atmel-pdmic.o
		snd-atmel-soc-tse850-pcm5142-objs := tse850-pcm5142.o
		snd-soc-mikroe-proto-objs := mikroe-proto.o

		obj-$(CONFIG_SND_AT91_SOC_SAM9G20_WM8731) += snd-soc-sam9g20-wm8731.o
		obj-$(CONFIG_SND_ATMEL_SOC_WM8904) += snd-atmel-soc-wm8904.o
		@@ -24,3 +25,4 @@ obj-$(CONFIG_SND_AT91_SOC_SAM9X5_WM8731) += snd-soc-sam9x5-wm8731.o
		obj-$(CONFIG_SND_ATMEL_SOC_CLASSD) += snd-atmel-soc-classd.o
		obj-$(CONFIG_SND_ATMEL_SOC_PDMIC) += snd-atmel-soc-pdmic.o
		obj-$(CONFIG_SND_ATMEL_SOC_TSE850_PCM5142) += snd-atmel-soc-tse850-pcm5142.o
		obj-$(CONFIG_SND_SOC_MIKROE_PROTO) += snd-soc-mikroe-proto.o

sound/soc/atmel/mikroe-proto.c

0 → 100644

+165 −0

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		/*
		* ASoC driver for PROTO AudioCODEC (with a WM8731)
		*
		* Author: Florian Meier, <koalo@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.
		*/

		#include <linux/module.h>
		#include <linux/platform_device.h>

		#include <sound/core.h>
		#include <sound/pcm.h>
		#include <sound/soc.h>
		#include <sound/jack.h>

		#include "../codecs/wm8731.h"

		#define XTAL_RATE 12288000 /* This is fixed on this board */

		static int snd_proto_init(struct snd_soc_pcm_runtime *rtd)
		{
		struct snd_soc_card *card = rtd->card;
		struct snd_soc_dai *codec_dai = rtd->codec_dai;

		/* Set proto sysclk */
		int ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
		XTAL_RATE, SND_SOC_CLOCK_IN);
		if (ret < 0) {
		dev_err(card->dev, "Failed to set WM8731 SYSCLK: %d\n",
		ret);
		return ret;
		}

		return 0;
		}

		static const struct snd_soc_dapm_widget snd_proto_widget[] = {
		SND_SOC_DAPM_MIC("Microphone Jack", NULL),
		SND_SOC_DAPM_HP("Headphone Jack", NULL),
		};

		static const struct snd_soc_dapm_route snd_proto_route[] = {
		/* speaker connected to LHPOUT/RHPOUT */
		{"Headphone Jack", NULL, "LHPOUT"},
		{"Headphone Jack", NULL, "RHPOUT"},

		/* mic is connected to Mic Jack, with WM8731 Mic Bias */
		{"MICIN", NULL, "Mic Bias"},
		{"Mic Bias", NULL, "Microphone Jack"},
		};

		/* audio machine driver */
		static struct snd_soc_card snd_proto = {
		.name = "snd_mikroe_proto",
		.owner = THIS_MODULE,
		.dapm_widgets = snd_proto_widget,
		.num_dapm_widgets = ARRAY_SIZE(snd_proto_widget),
		.dapm_routes = snd_proto_route,
		.num_dapm_routes = ARRAY_SIZE(snd_proto_route),
		};

		static int snd_proto_probe(struct platform_device *pdev)
		{
		struct snd_soc_dai_link *dai;
		struct device_node *np = pdev->dev.of_node;
		struct device_node codec_np, cpu_np;
		struct device_node *bitclkmaster = NULL;
		struct device_node *framemaster = NULL;
		unsigned int dai_fmt;
		int ret = 0;

		if (!np) {
		dev_err(&pdev->dev, "No device node supplied\n");
		return -EINVAL;
		}

		snd_proto.dev = &pdev->dev;
		ret = snd_soc_of_parse_card_name(&snd_proto, "model");
		if (ret)
		return ret;

		dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
		if (!dai)
		return -ENOMEM;

		snd_proto.dai_link = dai;
		snd_proto.num_links = 1;

		dai->name = "WM8731";
		dai->stream_name = "WM8731 HiFi";
		dai->codec_dai_name = "wm8731-hifi";
		dai->init = &snd_proto_init;

		codec_np = of_parse_phandle(np, "audio-codec", 0);
		if (!codec_np) {
		dev_err(&pdev->dev, "audio-codec node missing\n");
		return -EINVAL;
		}
		dai->codec_of_node = codec_np;

		cpu_np = of_parse_phandle(np, "i2s-controller", 0);
		if (!cpu_np) {
		dev_err(&pdev->dev, "i2s-controller missing\n");
		return -EINVAL;
		}
		dai->cpu_of_node = cpu_np;
		dai->platform_of_node = cpu_np;

		dai_fmt = snd_soc_of_parse_daifmt(np, NULL,
		&bitclkmaster, &framemaster);
		if (bitclkmaster != framemaster) {
		dev_err(&pdev->dev, "Must be the same bitclock and frame master\n");
		return -EINVAL;
		}
		if (bitclkmaster) {
		dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
		if (codec_np == bitclkmaster)
		dai_fmt \|= SND_SOC_DAIFMT_CBM_CFM;
		else
		dai_fmt \|= SND_SOC_DAIFMT_CBS_CFS;
		}
		of_node_put(bitclkmaster);
		of_node_put(framemaster);
		dai->dai_fmt = dai_fmt;

		of_node_put(codec_np);
		of_node_put(cpu_np);

		ret = snd_soc_register_card(&snd_proto);
		if (ret && ret != -EPROBE_DEFER)
		dev_err(&pdev->dev,
		"snd_soc_register_card() failed: %d\n", ret);

		return ret;
		}

		static int snd_proto_remove(struct platform_device *pdev)
		{
		return snd_soc_unregister_card(&snd_proto);
		}

		static const struct of_device_id snd_proto_of_match[] = {
		{ .compatible = "mikroe,mikroe-proto", },
		{},
		};
		MODULE_DEVICE_TABLE(of, snd_proto_of_match);

		static struct platform_driver snd_proto_driver = {
		.driver = {
		.name = "snd-mikroe-proto",
		.of_match_table = snd_proto_of_match,
		},
		.probe = snd_proto_probe,
		.remove = snd_proto_remove,
		};

		module_platform_driver(snd_proto_driver);

		MODULE_AUTHOR("Florian Meier");
		MODULE_DESCRIPTION("ASoC Driver for PROTO board (WM8731)");
		MODULE_LICENSE("GPL");