sound/soc/atmel/mikroe-proto.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ASoC driver for PROTO AudioCODEC (with a WM8731)
   4  *
   5  * Author:      Florian Meier, <koalo@koalo.de>
   6  *            Copyright 2013
   7  */
   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
  21 static 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 = rtd->codec_dai;
  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
  38 static 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
  43 static 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 */
  54 static 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
  63 static 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                 return -EINVAL;
 119         }
 120         dai->cpus->of_node = cpu_np;
 121         dai->platforms->of_node = cpu_np;
 122
 123         dai_fmt = snd_soc_of_parse_daifmt(np, NULL,
 124                                           &bitclkmaster, &framemaster);
 125         if (bitclkmaster != framemaster) {
 126                 dev_err(&pdev->dev, "Must be the same bitclock and frame master\n");
 127                 return -EINVAL;
 128         }
 129         if (bitclkmaster) {
 130                 dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
 131                 if (codec_np == bitclkmaster)
 132                         dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 133                 else
 134                         dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
 135         }
 136         of_node_put(bitclkmaster);
 137         of_node_put(framemaster);
 138         dai->dai_fmt = dai_fmt;
 139
 140         of_node_put(codec_np);
 141         of_node_put(cpu_np);
 142
 143         ret = snd_soc_register_card(&snd_proto);
 144         if (ret && ret != -EPROBE_DEFER)
 145                 dev_err(&pdev->dev,
 146                         "snd_soc_register_card() failed: %d\n", ret);
 147
 148         return ret;
 149 }
 150
 151 static int snd_proto_remove(struct platform_device *pdev)
 152 {
 153         return snd_soc_unregister_card(&snd_proto);
 154 }
 155
 156 static const struct of_device_id snd_proto_of_match[] = {
 157         { .compatible = "mikroe,mikroe-proto", },
 158         {},
 159 };
 160 MODULE_DEVICE_TABLE(of, snd_proto_of_match);
 161
 162 static struct platform_driver snd_proto_driver = {
 163         .driver = {
 164                 .name   = "snd-mikroe-proto",
 165                 .of_match_table = snd_proto_of_match,
 166         },
 167         .probe    = snd_proto_probe,
 168         .remove  = snd_proto_remove,
 169 };
 170
 171 module_platform_driver(snd_proto_driver);
 172
 173 MODULE_AUTHOR("Florian Meier");
 174 MODULE_DESCRIPTION("ASoC Driver for PROTO board (WM8731)");
 175 MODULE_LICENSE("GPL");