209 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards4 * that are using WM8731 as codec.5 *6 * Copyright (C) 2011 Atmel,7 * Nicolas Ferre <nicolas.ferre@atmel.com>8 *9 * Copyright (C) 2013 Paratronic,10 * Richard Genoud <richard.genoud@gmail.com>11 *12 * Based on sam9g20_wm8731.c by:13 * Sedji Gaouaou <sedji.gaouaou@atmel.com>14 */15#include <linux/of.h>16#include <linux/export.h>17#include <linux/module.h>18#include <linux/mod_devicetable.h>19#include <linux/platform_device.h>20#include <linux/device.h>21 22#include <sound/soc.h>23#include <sound/soc-dai.h>24#include <sound/soc-dapm.h>25 26#include "../codecs/wm8731.h"27#include "atmel_ssc_dai.h"28 29 30#define MCLK_RATE 1228800031 32#define DRV_NAME "sam9x5-snd-wm8731"33 34struct sam9x5_drvdata {35 int ssc_id;36};37 38/*39 * Logic for a wm8731 as connected on a at91sam9x5ek based board.40 */41static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd)42{43 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);44 struct device *dev = rtd->dev;45 int ret;46 47 dev_dbg(dev, "%s called\n", __func__);48 49 /* set the codec system clock for DAC and ADC */50 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,51 MCLK_RATE, SND_SOC_CLOCK_IN);52 if (ret < 0) {53 dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret);54 return ret;55 }56 57 return 0;58}59 60/*61 * Audio paths on at91sam9x5ek board:62 *63 * |A| ------------> | | ---R----> Headphone Jack64 * |T| <----\ | WM | ---L--/65 * |9| ---> CLK <--> | 8731 | <--R----- Line In Jack66 * |1| <------------ | | <--L--/67 */68static const struct snd_soc_dapm_widget sam9x5_dapm_widgets[] = {69 SND_SOC_DAPM_HP("Headphone Jack", NULL),70 SND_SOC_DAPM_LINE("Line In Jack", NULL),71};72 73static int sam9x5_wm8731_driver_probe(struct platform_device *pdev)74{75 struct device_node *np = pdev->dev.of_node;76 struct device_node *codec_np, *cpu_np;77 struct snd_soc_card *card;78 struct snd_soc_dai_link *dai;79 struct sam9x5_drvdata *priv;80 struct snd_soc_dai_link_component *comp;81 int ret;82 83 if (!np) {84 dev_err(&pdev->dev, "No device node supplied\n");85 return -EINVAL;86 }87 88 card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);89 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);90 dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);91 comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL);92 if (!dai || !card || !priv || !comp) {93 ret = -ENOMEM;94 goto out;95 }96 97 snd_soc_card_set_drvdata(card, priv);98 99 card->dev = &pdev->dev;100 card->owner = THIS_MODULE;101 card->dai_link = dai;102 card->num_links = 1;103 card->dapm_widgets = sam9x5_dapm_widgets;104 card->num_dapm_widgets = ARRAY_SIZE(sam9x5_dapm_widgets);105 106 dai->cpus = &comp[0];107 dai->num_cpus = 1;108 dai->codecs = &comp[1];109 dai->num_codecs = 1;110 dai->platforms = &comp[2];111 dai->num_platforms = 1;112 113 dai->name = "WM8731";114 dai->stream_name = "WM8731 PCM";115 dai->codecs->dai_name = "wm8731-hifi";116 dai->init = sam9x5_wm8731_init;117 dai->dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF118 | SND_SOC_DAIFMT_CBP_CFP;119 120 ret = snd_soc_of_parse_card_name(card, "atmel,model");121 if (ret) {122 dev_err(&pdev->dev, "atmel,model node missing\n");123 goto out;124 }125 126 ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");127 if (ret) {128 dev_err(&pdev->dev, "atmel,audio-routing node missing\n");129 goto out;130 }131 132 codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);133 if (!codec_np) {134 dev_err(&pdev->dev, "atmel,audio-codec node missing\n");135 ret = -EINVAL;136 goto out;137 }138 139 dai->codecs->of_node = codec_np;140 141 cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);142 if (!cpu_np) {143 dev_err(&pdev->dev, "atmel,ssc-controller node missing\n");144 ret = -EINVAL;145 goto out_put_codec_np;146 }147 dai->cpus->of_node = cpu_np;148 dai->platforms->of_node = cpu_np;149 150 priv->ssc_id = of_alias_get_id(cpu_np, "ssc");151 152 ret = atmel_ssc_set_audio(priv->ssc_id);153 if (ret != 0) {154 dev_err(&pdev->dev, "Failed to set SSC %d for audio: %d\n",155 ret, priv->ssc_id);156 goto out_put_cpu_np;157 }158 159 ret = devm_snd_soc_register_card(&pdev->dev, card);160 if (ret) {161 dev_err(&pdev->dev, "Platform device allocation failed\n");162 goto out_put_audio;163 }164 165 dev_dbg(&pdev->dev, "%s ok\n", __func__);166 167 goto out_put_cpu_np;168 169out_put_audio:170 atmel_ssc_put_audio(priv->ssc_id);171out_put_cpu_np:172 of_node_put(cpu_np);173out_put_codec_np:174 of_node_put(codec_np);175out:176 return ret;177}178 179static void sam9x5_wm8731_driver_remove(struct platform_device *pdev)180{181 struct snd_soc_card *card = platform_get_drvdata(pdev);182 struct sam9x5_drvdata *priv = card->drvdata;183 184 atmel_ssc_put_audio(priv->ssc_id);185}186 187static const struct of_device_id sam9x5_wm8731_of_match[] = {188 { .compatible = "atmel,sam9x5-wm8731-audio", },189 {},190};191MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match);192 193static struct platform_driver sam9x5_wm8731_driver = {194 .driver = {195 .name = DRV_NAME,196 .of_match_table = of_match_ptr(sam9x5_wm8731_of_match),197 },198 .probe = sam9x5_wm8731_driver_probe,199 .remove = sam9x5_wm8731_driver_remove,200};201module_platform_driver(sam9x5_wm8731_driver);202 203/* Module information */204MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");205MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>");206MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731");207MODULE_LICENSE("GPL");208MODULE_ALIAS("platform:" DRV_NAME);209