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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * atmel_wm8904 - Atmel ASoC driver for boards with WM8904 codec.4 *5 * Copyright (C) 2012 Atmel6 *7 * Author: Bo Shen <voice.shen@atmel.com>8 */9 10#include <linux/clk.h>11#include <linux/module.h>12#include <linux/of.h>13 14#include <sound/soc.h>15 16#include "../codecs/wm8904.h"17#include "atmel_ssc_dai.h"18 19static const struct snd_soc_dapm_widget atmel_asoc_wm8904_dapm_widgets[] = {20 SND_SOC_DAPM_HP("Headphone Jack", NULL),21 SND_SOC_DAPM_MIC("Mic", NULL),22 SND_SOC_DAPM_LINE("Line In Jack", NULL),23};24 25static int atmel_asoc_wm8904_hw_params(struct snd_pcm_substream *substream,26 struct snd_pcm_hw_params *params)27{28 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);29 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);30 int ret;31 32 ret = snd_soc_dai_set_pll(codec_dai, WM8904_FLL_MCLK, WM8904_FLL_MCLK,33 32768, params_rate(params) * 256);34 if (ret < 0) {35 pr_err("%s - failed to set wm8904 codec PLL.", __func__);36 return ret;37 }38 39 /*40 * As here wm8904 use FLL output as its system clock41 * so calling set_sysclk won't care freq parameter42 * then we pass 043 */44 ret = snd_soc_dai_set_sysclk(codec_dai, WM8904_CLK_FLL,45 0, SND_SOC_CLOCK_IN);46 if (ret < 0) {47 pr_err("%s -failed to set wm8904 SYSCLK\n", __func__);48 return ret;49 }50 51 return 0;52}53 54static const struct snd_soc_ops atmel_asoc_wm8904_ops = {55 .hw_params = atmel_asoc_wm8904_hw_params,56};57 58SND_SOC_DAILINK_DEFS(pcm,59 DAILINK_COMP_ARRAY(COMP_EMPTY()),60 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8904-hifi")),61 DAILINK_COMP_ARRAY(COMP_EMPTY()));62 63static struct snd_soc_dai_link atmel_asoc_wm8904_dailink = {64 .name = "WM8904",65 .stream_name = "WM8904 PCM",66 .dai_fmt = SND_SOC_DAIFMT_I2S67 | SND_SOC_DAIFMT_NB_NF68 | SND_SOC_DAIFMT_CBP_CFP,69 .ops = &atmel_asoc_wm8904_ops,70 SND_SOC_DAILINK_REG(pcm),71};72 73static struct snd_soc_card atmel_asoc_wm8904_card = {74 .name = "atmel_asoc_wm8904",75 .owner = THIS_MODULE,76 .dai_link = &atmel_asoc_wm8904_dailink,77 .num_links = 1,78 .dapm_widgets = atmel_asoc_wm8904_dapm_widgets,79 .num_dapm_widgets = ARRAY_SIZE(atmel_asoc_wm8904_dapm_widgets),80 .fully_routed = true,81};82 83static int atmel_asoc_wm8904_dt_init(struct platform_device *pdev)84{85 struct device_node *np = pdev->dev.of_node;86 struct device_node *codec_np, *cpu_np;87 struct snd_soc_card *card = &atmel_asoc_wm8904_card;88 struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;89 int ret;90 91 if (!np) {92 dev_err(&pdev->dev, "only device tree supported\n");93 return -EINVAL;94 }95 96 ret = snd_soc_of_parse_card_name(card, "atmel,model");97 if (ret) {98 dev_err(&pdev->dev, "failed to parse card name\n");99 return ret;100 }101 102 ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");103 if (ret) {104 dev_err(&pdev->dev, "failed to parse audio routing\n");105 return ret;106 }107 108 cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);109 if (!cpu_np) {110 dev_err(&pdev->dev, "failed to get dai and pcm info\n");111 ret = -EINVAL;112 return ret;113 }114 dailink->cpus->of_node = cpu_np;115 dailink->platforms->of_node = cpu_np;116 of_node_put(cpu_np);117 118 codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);119 if (!codec_np) {120 dev_err(&pdev->dev, "failed to get codec info\n");121 ret = -EINVAL;122 return ret;123 }124 dailink->codecs->of_node = codec_np;125 of_node_put(codec_np);126 127 return 0;128}129 130static int atmel_asoc_wm8904_probe(struct platform_device *pdev)131{132 struct snd_soc_card *card = &atmel_asoc_wm8904_card;133 struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;134 int id, ret;135 136 card->dev = &pdev->dev;137 ret = atmel_asoc_wm8904_dt_init(pdev);138 if (ret) {139 dev_err(&pdev->dev, "failed to init dt info\n");140 return ret;141 }142 143 id = of_alias_get_id((struct device_node *)dailink->cpus->of_node, "ssc");144 ret = atmel_ssc_set_audio(id);145 if (ret != 0) {146 dev_err(&pdev->dev, "failed to set SSC %d for audio\n", id);147 return ret;148 }149 150 ret = snd_soc_register_card(card);151 if (ret) {152 dev_err(&pdev->dev, "snd_soc_register_card failed\n");153 goto err_set_audio;154 }155 156 return 0;157 158err_set_audio:159 atmel_ssc_put_audio(id);160 return ret;161}162 163static void atmel_asoc_wm8904_remove(struct platform_device *pdev)164{165 struct snd_soc_card *card = platform_get_drvdata(pdev);166 struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;167 int id;168 169 id = of_alias_get_id((struct device_node *)dailink->cpus->of_node, "ssc");170 171 snd_soc_unregister_card(card);172 atmel_ssc_put_audio(id);173}174 175#ifdef CONFIG_OF176static const struct of_device_id atmel_asoc_wm8904_dt_ids[] = {177 { .compatible = "atmel,asoc-wm8904", },178 { }179};180MODULE_DEVICE_TABLE(of, atmel_asoc_wm8904_dt_ids);181#endif182 183static struct platform_driver atmel_asoc_wm8904_driver = {184 .driver = {185 .name = "atmel-wm8904-audio",186 .of_match_table = of_match_ptr(atmel_asoc_wm8904_dt_ids),187 .pm = &snd_soc_pm_ops,188 },189 .probe = atmel_asoc_wm8904_probe,190 .remove = atmel_asoc_wm8904_remove,191};192 193module_platform_driver(atmel_asoc_wm8904_driver);194 195/* Module information */196MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>");197MODULE_DESCRIPTION("ALSA SoC machine driver for Atmel EK with WM8904 codec");198MODULE_LICENSE("GPL");199