ASoC: atmel: add wm8904 based audio machine driver
Add wm8904 based audio machine driver for Atmel EK board The following ek board based on it - at91sam9n12ek - sama5d3xek (d31, d33, d34, d35) Signed-off-by: Bo Shen <voice.shen@atmel.com> Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Bo Shen
Mark Brown
parent
95e0e07e71
commit
52f19b14ec
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@ -0,0 +1,55 @@
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Atmel ASoC driver with wm8904 audio codec complex
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Required properties:
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- compatible: "atmel,asoc-wm8904"
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- atmel,model: The user-visible name of this sound complex.
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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. Valid names for sources and
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sinks are the WM8904's pins, and the jacks on the board:
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WM8904 pins:
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* IN1L
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* IN1R
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* IN2L
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* IN2R
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* IN3L
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* IN3R
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* HPOUTL
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* HPOUTR
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* LINEOUTL
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* LINEOUTR
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* MICBIAS
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Board connectors:
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* Headphone Jack
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* Line In Jack
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* Mic
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- atmel,ssc-controller: The phandle of the SSC controller
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- atmel,audio-codec: The phandle of the WM8904 audio codec
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Optional properties:
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- pinctrl-names, pinctrl-0: Please refer to pinctrl-bindings.txt
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Example:
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sound {
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compatible = "atmel,asoc-wm8904";
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_pck0_as_mck>;
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atmel,model = "wm8904 @ AT91SAM9N12EK";
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atmel,audio-routing =
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"Headphone Jack", "HPOUTL",
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"Headphone Jack", "HPOUTR",
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"IN2L", "Line In Jack",
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"IN2R", "Line In Jack",
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"Mic", "MICBIAS",
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"IN1L", "Mic";
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atmel,ssc-controller = <&ssc0>;
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atmel,audio-codec = <&wm8904>;
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};
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@ -33,6 +33,16 @@ config SND_AT91_SOC_SAM9G20_WM8731
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Say Y if you want to add support for SoC audio on WM8731-based
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AT91sam9g20 evaluation board.
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config SND_ATMEL_SOC_WM8904
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tristate "Atmel ASoC driver for boards using WM8904 codec"
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depends on ARCH_AT91 && ATMEL_SSC && SND_ATMEL_SOC
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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_WM8904
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help
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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_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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@ -11,6 +11,8 @@ obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o
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# AT91 Machine Support
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snd-soc-sam9g20-wm8731-objs := sam9g20_wm8731.o
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snd-atmel-soc-wm8904-objs := atmel_wm8904.o
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obj-$(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_AFEB9260) += snd-soc-afeb9260.o
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@ -0,0 +1,254 @@
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/*
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* atmel_wm8904 - Atmel ASoC driver for boards with WM8904 codec.
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*
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* Copyright (C) 2012 Atmel
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*
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* Author: Bo Shen <voice.shen@atmel.com>
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*
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* GPLv2 or later
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*/
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#include <linux/clk.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/pinctrl/consumer.h>
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#include <sound/soc.h>
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#include "../codecs/wm8904.h"
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#include "atmel_ssc_dai.h"
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#define MCLK_RATE 32768
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static struct clk *mclk;
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static const struct snd_soc_dapm_widget atmel_asoc_wm8904_dapm_widgets[] = {
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SND_SOC_DAPM_HP("Headphone Jack", NULL),
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SND_SOC_DAPM_MIC("Mic", NULL),
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SND_SOC_DAPM_LINE("Line In Jack", NULL),
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};
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static int atmel_asoc_wm8904_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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int ret;
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ret = snd_soc_dai_set_pll(codec_dai, WM8904_FLL_MCLK, WM8904_FLL_MCLK,
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32768, params_rate(params) * 256);
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if (ret < 0) {
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pr_err("%s - failed to set wm8904 codec PLL.", __func__);
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return ret;
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}
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/*
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* As here wm8904 use FLL output as its system clock
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* so calling set_sysclk won't care freq parameter
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* then we pass 0
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*/
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8904_CLK_FLL,
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0, SND_SOC_CLOCK_IN);
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if (ret < 0) {
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pr_err("%s -failed to set wm8904 SYSCLK\n", __func__);
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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 struct snd_soc_ops atmel_asoc_wm8904_ops = {
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.hw_params = atmel_asoc_wm8904_hw_params,
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};
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static int atmel_set_bias_level(struct snd_soc_card *card,
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struct snd_soc_dapm_context *dapm,
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enum snd_soc_bias_level level)
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{
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if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
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switch (level) {
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case SND_SOC_BIAS_PREPARE:
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clk_prepare_enable(mclk);
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break;
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case SND_SOC_BIAS_OFF:
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clk_disable_unprepare(mclk);
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break;
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default:
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break;
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}
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}
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return 0;
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};
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static struct snd_soc_dai_link atmel_asoc_wm8904_dailink = {
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.name = "WM8904",
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.stream_name = "WM8904 PCM",
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.codec_dai_name = "wm8904-hifi",
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.dai_fmt = SND_SOC_DAIFMT_I2S
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| SND_SOC_DAIFMT_NB_NF
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| SND_SOC_DAIFMT_CBM_CFM,
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.ops = &atmel_asoc_wm8904_ops,
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};
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static struct snd_soc_card atmel_asoc_wm8904_card = {
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.name = "atmel_asoc_wm8904",
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.owner = THIS_MODULE,
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.set_bias_level = atmel_set_bias_level,
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.dai_link = &atmel_asoc_wm8904_dailink,
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.num_links = 1,
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.dapm_widgets = atmel_asoc_wm8904_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(atmel_asoc_wm8904_dapm_widgets),
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.fully_routed = true,
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};
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static int atmel_asoc_wm8904_dt_init(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 = &atmel_asoc_wm8904_card;
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struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
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int ret;
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if (!np) {
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dev_err(&pdev->dev, "only device tree supported\n");
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return -EINVAL;
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}
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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, "failed to parse card name\n");
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return ret;
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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, "failed to parse audio routing\n");
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return ret;
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}
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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, "failed to get dai and pcm info\n");
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ret = -EINVAL;
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return ret;
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}
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dailink->cpu_of_node = cpu_np;
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dailink->platform_of_node = cpu_np;
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of_node_put(cpu_np);
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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, "failed to get codec info\n");
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ret = -EINVAL;
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return ret;
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}
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dailink->codec_of_node = codec_np;
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of_node_put(codec_np);
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return 0;
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}
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static int atmel_asoc_wm8904_probe(struct platform_device *pdev)
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{
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struct snd_soc_card *card = &atmel_asoc_wm8904_card;
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struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
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struct clk *clk_src;
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struct pinctrl *pinctrl;
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int id, ret;
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pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
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if (IS_ERR(pinctrl)) {
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dev_err(&pdev->dev, "failed to request pinctrl\n");
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return PTR_ERR(pinctrl);
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}
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card->dev = &pdev->dev;
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ret = atmel_asoc_wm8904_dt_init(pdev);
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if (ret) {
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dev_err(&pdev->dev, "failed to init dt info\n");
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return ret;
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}
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id = of_alias_get_id((struct device_node *)dailink->cpu_of_node, "ssc");
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ret = atmel_ssc_set_audio(id);
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if (ret != 0) {
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dev_err(&pdev->dev, "failed to set SSC %d for audio\n", id);
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return ret;
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}
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mclk = clk_get(NULL, "pck0");
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if (IS_ERR(mclk)) {
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dev_err(&pdev->dev, "failed to get pck0\n");
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ret = PTR_ERR(mclk);
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goto err_set_audio;
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}
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clk_src = clk_get(NULL, "clk32k");
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if (IS_ERR(clk_src)) {
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dev_err(&pdev->dev, "failed to get clk32k\n");
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ret = PTR_ERR(clk_src);
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goto err_set_audio;
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}
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ret = clk_set_parent(mclk, clk_src);
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clk_put(clk_src);
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if (ret != 0) {
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dev_err(&pdev->dev, "failed to set MCLK parent\n");
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goto err_set_audio;
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}
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dev_info(&pdev->dev, "setting pck0 to %dHz\n", MCLK_RATE);
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clk_set_rate(mclk, MCLK_RATE);
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ret = snd_soc_register_card(card);
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if (ret) {
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dev_err(&pdev->dev, "snd_soc_register_card failed\n");
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goto err_set_audio;
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}
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return 0;
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err_set_audio:
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atmel_ssc_put_audio(id);
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return ret;
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}
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static int atmel_asoc_wm8904_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 snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
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int id;
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id = of_alias_get_id((struct device_node *)dailink->cpu_of_node, "ssc");
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snd_soc_unregister_card(card);
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atmel_ssc_put_audio(id);
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id atmel_asoc_wm8904_dt_ids[] = {
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{ .compatible = "atmel,asoc-wm8904", },
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{ }
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};
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#endif
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static struct platform_driver atmel_asoc_wm8904_driver = {
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.driver = {
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.name = "atmel-wm8904-audio",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(atmel_asoc_wm8904_dt_ids),
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},
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.probe = atmel_asoc_wm8904_probe,
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.remove = atmel_asoc_wm8904_remove,
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};
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module_platform_driver(atmel_asoc_wm8904_driver);
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/* Module information */
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MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>");
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MODULE_DESCRIPTION("ALSA SoC machine driver for Atmel EK with WM8904 codec");
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MODULE_LICENSE("GPL");
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