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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * ASoC driver for PROTO AudioCODEC (with a WM8731)4 *5 * Author: Florian Meier, <koalo@koalo.de>6 * Copyright 20137 */8 9#include <linux/module.h>10#include <linux/platform_device.h>11 12#include <sound/core.h>13#include <sound/pcm.h>14#include <sound/soc.h>15#include <sound/jack.h>16 17#include "../codecs/wm8731.h"18 19#define XTAL_RATE 12288000 /* This is fixed on this board */20 21static int snd_proto_init(struct snd_soc_pcm_runtime *rtd)22{23 struct snd_soc_card *card = rtd->card;24 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);25 26 /* Set proto sysclk */27 int ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,28 XTAL_RATE, SND_SOC_CLOCK_IN);29 if (ret < 0) {30 dev_err(card->dev, "Failed to set WM8731 SYSCLK: %d\n",31 ret);32 return ret;33 }34 35 return 0;36}37 38static const struct snd_soc_dapm_widget snd_proto_widget[] = {39 SND_SOC_DAPM_MIC("Microphone Jack", NULL),40 SND_SOC_DAPM_HP("Headphone Jack", NULL),41};42 43static const struct snd_soc_dapm_route snd_proto_route[] = {44 /* speaker connected to LHPOUT/RHPOUT */45 {"Headphone Jack", NULL, "LHPOUT"},46 {"Headphone Jack", NULL, "RHPOUT"},47 48 /* mic is connected to Mic Jack, with WM8731 Mic Bias */49 {"MICIN", NULL, "Mic Bias"},50 {"Mic Bias", NULL, "Microphone Jack"},51};52 53/* audio machine driver */54static struct snd_soc_card snd_proto = {55 .name = "snd_mikroe_proto",56 .owner = THIS_MODULE,57 .dapm_widgets = snd_proto_widget,58 .num_dapm_widgets = ARRAY_SIZE(snd_proto_widget),59 .dapm_routes = snd_proto_route,60 .num_dapm_routes = ARRAY_SIZE(snd_proto_route),61};62 63static int snd_proto_probe(struct platform_device *pdev)64{65 struct snd_soc_dai_link *dai;66 struct snd_soc_dai_link_component *comp;67 struct device_node *np = pdev->dev.of_node;68 struct device_node *codec_np, *cpu_np;69 struct device_node *bitclkmaster = NULL;70 struct device_node *framemaster = NULL;71 unsigned int dai_fmt;72 int ret = 0;73 74 if (!np) {75 dev_err(&pdev->dev, "No device node supplied\n");76 return -EINVAL;77 }78 79 snd_proto.dev = &pdev->dev;80 ret = snd_soc_of_parse_card_name(&snd_proto, "model");81 if (ret)82 return ret;83 84 dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);85 if (!dai)86 return -ENOMEM;87 88 /* for cpus/codecs/platforms */89 comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL);90 if (!comp)91 return -ENOMEM;92 93 snd_proto.dai_link = dai;94 snd_proto.num_links = 1;95 96 dai->cpus = &comp[0];97 dai->num_cpus = 1;98 dai->codecs = &comp[1];99 dai->num_codecs = 1;100 dai->platforms = &comp[2];101 dai->num_platforms = 1;102 103 dai->name = "WM8731";104 dai->stream_name = "WM8731 HiFi";105 dai->codecs->dai_name = "wm8731-hifi";106 dai->init = &snd_proto_init;107 108 codec_np = of_parse_phandle(np, "audio-codec", 0);109 if (!codec_np) {110 dev_err(&pdev->dev, "audio-codec node missing\n");111 return -EINVAL;112 }113 dai->codecs->of_node = codec_np;114 115 cpu_np = of_parse_phandle(np, "i2s-controller", 0);116 if (!cpu_np) {117 dev_err(&pdev->dev, "i2s-controller missing\n");118 ret = -EINVAL;119 goto put_codec_node;120 }121 dai->cpus->of_node = cpu_np;122 dai->platforms->of_node = cpu_np;123 124 dai_fmt = snd_soc_daifmt_parse_format(np, NULL);125 snd_soc_daifmt_parse_clock_provider_as_phandle(np, NULL,126 &bitclkmaster, &framemaster);127 if (bitclkmaster != framemaster) {128 dev_err(&pdev->dev, "Must be the same bitclock and frame master\n");129 ret = -EINVAL;130 goto put_cpu_node;131 }132 if (bitclkmaster) {133 if (codec_np == bitclkmaster)134 dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;135 else136 dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;137 } else {138 dai_fmt |= snd_soc_daifmt_parse_clock_provider_as_flag(np, NULL);139 }140 141 142 dai->dai_fmt = dai_fmt;143 ret = devm_snd_soc_register_card(&pdev->dev, &snd_proto);144 if (ret)145 dev_err_probe(&pdev->dev, ret,146 "snd_soc_register_card() failed\n");147 148 149put_cpu_node:150 of_node_put(bitclkmaster);151 of_node_put(framemaster);152 of_node_put(cpu_np);153put_codec_node:154 of_node_put(codec_np);155 return ret;156}157 158static const struct of_device_id snd_proto_of_match[] = {159 { .compatible = "mikroe,mikroe-proto", },160 {},161};162MODULE_DEVICE_TABLE(of, snd_proto_of_match);163 164static struct platform_driver snd_proto_driver = {165 .driver = {166 .name = "snd-mikroe-proto",167 .of_match_table = snd_proto_of_match,168 },169 .probe = snd_proto_probe,170};171 172module_platform_driver(snd_proto_driver);173 174MODULE_AUTHOR("Florian Meier");175MODULE_DESCRIPTION("ASoC Driver for PROTO board (WM8731)");176MODULE_LICENSE("GPL");177