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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | // SPDX-License-Identifier: GPL-2.0-only /* * ASoC driver for PROTO AudioCODEC (with a WM8731) * * Author: Florian Meier, <koalo@koalo.de> * Copyright 2013 */ #include <linux/module.h> #include <linux/platform_device.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/soc.h> #include <sound/jack.h> #include "../codecs/wm8731.h" #define XTAL_RATE 12288000 /* This is fixed on this board */ static int snd_proto_init(struct snd_soc_pcm_runtime *rtd) { struct snd_soc_card *card = rtd->card; struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); /* Set proto sysclk */ int ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, XTAL_RATE, SND_SOC_CLOCK_IN); if (ret < 0) { dev_err(card->dev, "Failed to set WM8731 SYSCLK: %d\n", ret); return ret; } return 0; } static const struct snd_soc_dapm_widget snd_proto_widget[] = { SND_SOC_DAPM_MIC("Microphone Jack", NULL), SND_SOC_DAPM_HP("Headphone Jack", NULL), }; static const struct snd_soc_dapm_route snd_proto_route[] = { /* speaker connected to LHPOUT/RHPOUT */ {"Headphone Jack", NULL, "LHPOUT"}, {"Headphone Jack", NULL, "RHPOUT"}, /* mic is connected to Mic Jack, with WM8731 Mic Bias */ {"MICIN", NULL, "Mic Bias"}, {"Mic Bias", NULL, "Microphone Jack"}, }; /* audio machine driver */ static struct snd_soc_card snd_proto = { .name = "snd_mikroe_proto", .owner = THIS_MODULE, .dapm_widgets = snd_proto_widget, .num_dapm_widgets = ARRAY_SIZE(snd_proto_widget), .dapm_routes = snd_proto_route, .num_dapm_routes = ARRAY_SIZE(snd_proto_route), }; static int snd_proto_probe(struct platform_device *pdev) { struct snd_soc_dai_link *dai; struct snd_soc_dai_link_component *comp; struct device_node *np = pdev->dev.of_node; struct device_node *codec_np, *cpu_np; struct device_node *bitclkmaster = NULL; struct device_node *framemaster = NULL; unsigned int dai_fmt; int ret = 0; if (!np) { dev_err(&pdev->dev, "No device node supplied\n"); return -EINVAL; } snd_proto.dev = &pdev->dev; ret = snd_soc_of_parse_card_name(&snd_proto, "model"); if (ret) return ret; dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL); if (!dai) return -ENOMEM; /* for cpus/codecs/platforms */ comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL); if (!comp) return -ENOMEM; snd_proto.dai_link = dai; snd_proto.num_links = 1; dai->cpus = &comp[0]; dai->num_cpus = 1; dai->codecs = &comp[1]; dai->num_codecs = 1; dai->platforms = &comp[2]; dai->num_platforms = 1; dai->name = "WM8731"; dai->stream_name = "WM8731 HiFi"; dai->codecs->dai_name = "wm8731-hifi"; dai->init = &snd_proto_init; codec_np = of_parse_phandle(np, "audio-codec", 0); if (!codec_np) { dev_err(&pdev->dev, "audio-codec node missing\n"); return -EINVAL; } dai->codecs->of_node = codec_np; cpu_np = of_parse_phandle(np, "i2s-controller", 0); if (!cpu_np) { dev_err(&pdev->dev, "i2s-controller missing\n"); ret = -EINVAL; goto put_codec_node; } dai->cpus->of_node = cpu_np; dai->platforms->of_node = cpu_np; dai_fmt = snd_soc_daifmt_parse_format(np, NULL); snd_soc_daifmt_parse_clock_provider_as_phandle(np, NULL, &bitclkmaster, &framemaster); if (bitclkmaster != framemaster) { dev_err(&pdev->dev, "Must be the same bitclock and frame master\n"); ret = -EINVAL; goto put_cpu_node; } if (bitclkmaster) { if (codec_np == bitclkmaster) dai_fmt |= SND_SOC_DAIFMT_CBP_CFP; else dai_fmt |= SND_SOC_DAIFMT_CBC_CFC; } else { dai_fmt |= snd_soc_daifmt_parse_clock_provider_as_flag(np, NULL); } dai->dai_fmt = dai_fmt; ret = snd_soc_register_card(&snd_proto); if (ret) dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n"); put_cpu_node: of_node_put(bitclkmaster); of_node_put(framemaster); of_node_put(cpu_np); put_codec_node: of_node_put(codec_np); return ret; } static int snd_proto_remove(struct platform_device *pdev) { snd_soc_unregister_card(&snd_proto); return 0; } static const struct of_device_id snd_proto_of_match[] = { { .compatible = "mikroe,mikroe-proto", }, {}, }; MODULE_DEVICE_TABLE(of, snd_proto_of_match); static struct platform_driver snd_proto_driver = { .driver = { .name = "snd-mikroe-proto", .of_match_table = snd_proto_of_match, }, .probe = snd_proto_probe, .remove = snd_proto_remove, }; module_platform_driver(snd_proto_driver); MODULE_AUTHOR("Florian Meier"); MODULE_DESCRIPTION("ASoC Driver for PROTO board (WM8731)"); MODULE_LICENSE("GPL"); |