ASoC: atmel: machine driver for at91sam9x5-wm8731 boards
Description of the Asoc machine driver for an at91sam9x5 based board with a wm8731 audio DAC. Wm8731 is clocked by a crystal and used as a master on the SSC/I2S interface. Its connections are a headphone jack and an Line input jack. [Richard: this is based on an old patch from Nicolas that I forward ported and reworked to use only device tree] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Nicolas Ferre
Mark Brown
parent
52f19b14ec
commit
fdbcb3cba5
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@ -0,0 +1,35 @@
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* Atmel at91sam9x5ek wm8731 audio complex
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Required properties:
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- compatible: "atmel,sam9x5-wm8731-audio"
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- atmel,model: The user-visible name of this sound complex.
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- atmel,ssc-controller: The phandle of the SSC controller
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- atmel,audio-codec: The phandle of the WM8731 audio codec
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- atmel,audio-routing: A list of the connections between audio components.
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Each entry is a pair of strings, the first being the connection's sink,
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the second being the connection's source.
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Available audio endpoints for the audio-routing table:
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Board connectors:
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* Headphone Jack
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* Line In Jack
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wm8731 pins:
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cf Documentation/devicetree/bindings/sound/wm8731.txt
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Example:
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sound {
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compatible = "atmel,sam9x5-wm8731-audio";
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atmel,model = "wm8731 @ AT91SAM9X5EK";
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atmel,audio-routing =
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"Headphone Jack", "RHPOUT",
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"Headphone Jack", "LHPOUT",
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"LLINEIN", "Line In Jack",
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"RLINEIN", "Line In Jack";
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atmel,ssc-controller = <&ssc0>;
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atmel,audio-codec = <&wm8731>;
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};
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@ -16,3 +16,12 @@ codec: wm8731@1a {
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compatible = "wlf,wm8731";
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reg = <0x1a>;
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};
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Available audio endpoints for an audio-routing table:
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* LOUT: Left Channel Line Output
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* ROUT: Right Channel Line Output
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* LHPOUT: Left Channel Headphone Output
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* RHPOUT: Right Channel Headphone Output
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* LLINEIN: Left Channel Line Input
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* RLINEIN: Right Channel Line Input
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* MICIN: Microphone Input
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@ -43,6 +43,16 @@ config SND_ATMEL_SOC_WM8904
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Say Y if you want to add support for Atmel ASoC driver for boards using
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WM8904 codec.
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config SND_AT91_SOC_SAM9X5_WM8731
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tristate "SoC Audio support for WM8731-based at91sam9x5 board"
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depends on ATMEL_SSC && SND_ATMEL_SOC && SOC_AT91SAM9X5
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select SND_ATMEL_SOC_SSC
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select SND_ATMEL_SOC_DMA
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select SND_SOC_WM8731
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help
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Say Y if you want to add support for audio SoC on an
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at91sam9x5 based board that is using WM8731 codec.
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config SND_AT91_SOC_AFEB9260
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tristate "SoC Audio support for AFEB9260 board"
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depends on ARCH_AT91 && ATMEL_SSC && ARCH_AT91 && MACH_AFEB9260 && SND_ATMEL_SOC
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@ -12,7 +12,9 @@ obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o
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# AT91 Machine Support
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snd-soc-sam9g20-wm8731-objs := sam9g20_wm8731.o
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snd-atmel-soc-wm8904-objs := atmel_wm8904.o
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snd-soc-sam9x5-wm8731-objs := sam9x5_wm8731.o
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obj-$(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_AT91_SOC_SAM9X5_WM8731) += snd-soc-sam9x5-wm8731.o
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obj-$(CONFIG_SND_AT91_SOC_AFEB9260) += snd-soc-afeb9260.o
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208
sound/soc/atmel/sam9x5_wm8731.c
Normal file
208
sound/soc/atmel/sam9x5_wm8731.c
Normal file
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@ -0,0 +1,208 @@
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/*
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* sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards
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* that are using WM8731 as codec.
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*
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* Copyright (C) 2011 Atmel,
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* Nicolas Ferre <nicolas.ferre@atmel.com>
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*
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* Copyright (C) 2013 Paratronic,
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* Richard Genoud <richard.genoud@gmail.com>
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*
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* Based on sam9g20_wm8731.c by:
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* Sedji Gaouaou <sedji.gaouaou@atmel.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/of.h>
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#include <linux/export.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/platform_device.h>
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#include <linux/device.h>
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#include <sound/soc.h>
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#include <sound/soc-dai.h>
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#include <sound/soc-dapm.h>
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#include "../codecs/wm8731.h"
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#include "atmel_ssc_dai.h"
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#define MCLK_RATE 12288000
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#define DRV_NAME "sam9x5-snd-wm8731"
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struct sam9x5_drvdata {
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int ssc_id;
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};
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/*
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* Logic for a wm8731 as connected on a at91sam9x5ek based board.
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*/
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static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct device *dev = rtd->dev;
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int ret;
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dev_dbg(dev, "ASoC: %s called\n", __func__);
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/* set the codec system clock for DAC and ADC */
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
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MCLK_RATE, SND_SOC_CLOCK_IN);
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if (ret < 0) {
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dev_err(dev, "ASoC: Failed to set WM8731 SYSCLK: %d\n", 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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/*
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* Audio paths on at91sam9x5ek board:
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*
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* |A| ------------> | | ---R----> Headphone Jack
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* |T| <----\ | WM | ---L--/
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* |9| ---> CLK <--> | 8731 | <--R----- Line In Jack
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* |1| <------------ | | <--L--/
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*/
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static const struct snd_soc_dapm_widget sam9x5_dapm_widgets[] = {
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SND_SOC_DAPM_HP("Headphone Jack", NULL),
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SND_SOC_DAPM_LINE("Line In Jack", NULL),
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};
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static int sam9x5_wm8731_driver_probe(struct platform_device *pdev)
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{
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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 snd_soc_card *card;
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struct snd_soc_dai_link *dai;
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struct sam9x5_drvdata *priv;
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int ret;
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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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card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
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priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
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dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
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if (!dai || !card || !priv) {
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ret = -ENOMEM;
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goto out;
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}
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card->dev = &pdev->dev;
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card->owner = THIS_MODULE;
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card->dai_link = dai;
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card->num_links = 1;
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card->dapm_widgets = sam9x5_dapm_widgets;
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card->num_dapm_widgets = ARRAY_SIZE(sam9x5_dapm_widgets);
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dai->name = "WM8731";
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dai->stream_name = "WM8731 PCM";
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dai->codec_dai_name = "wm8731-hifi";
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dai->init = sam9x5_wm8731_init;
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dai->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
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| SND_SOC_DAIFMT_CBM_CFM;
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ret = snd_soc_of_parse_card_name(card, "atmel,model");
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if (ret) {
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dev_err(&pdev->dev, "atmel,model node missing\n");
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goto out;
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}
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ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
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if (ret) {
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dev_err(&pdev->dev, "atmel,audio-routing node missing\n");
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goto out;
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}
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codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
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if (!codec_np) {
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dev_err(&pdev->dev, "atmel,audio-codec node missing\n");
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ret = -EINVAL;
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goto out;
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}
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dai->codec_of_node = codec_np;
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cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
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if (!cpu_np) {
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dev_err(&pdev->dev, "atmel,ssc-controller node missing\n");
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ret = -EINVAL;
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goto out;
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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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priv->ssc_id = of_alias_get_id(cpu_np, "ssc");
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ret = atmel_ssc_set_audio(priv->ssc_id);
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if (ret != 0) {
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dev_err(&pdev->dev,
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"ASoC: Failed to set SSC %d for audio: %d\n",
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ret, priv->ssc_id);
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goto out;
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}
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of_node_put(codec_np);
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of_node_put(cpu_np);
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platform_set_drvdata(pdev, card);
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ret = snd_soc_register_card(card);
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if (ret) {
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dev_err(&pdev->dev,
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"ASoC: Platform device allocation failed\n");
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goto out_put_audio;
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}
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dev_dbg(&pdev->dev, "ASoC: %s ok\n", __func__);
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return ret;
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out_put_audio:
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atmel_ssc_put_audio(priv->ssc_id);
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out:
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return ret;
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}
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static int sam9x5_wm8731_driver_remove(struct platform_device *pdev)
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{
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struct snd_soc_card *card = platform_get_drvdata(pdev);
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struct sam9x5_drvdata *priv = card->drvdata;
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snd_soc_unregister_card(card);
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atmel_ssc_put_audio(priv->ssc_id);
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return 0;
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}
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static const struct of_device_id sam9x5_wm8731_of_match[] = {
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{ .compatible = "atmel,sam9x5-wm8731-audio", },
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{},
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};
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MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match);
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static struct platform_driver sam9x5_wm8731_driver = {
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.driver = {
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.name = DRV_NAME,
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(sam9x5_wm8731_of_match),
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},
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.probe = sam9x5_wm8731_driver_probe,
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.remove = sam9x5_wm8731_driver_remove,
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};
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module_platform_driver(sam9x5_wm8731_driver);
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/* Module information */
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MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
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MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>");
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MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:" DRV_NAME);
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