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Linux/sound/soc/samsung/arndale_rt5631.c

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  1 // SPDX-License-Identifier: GPL-2.0+
  2 //
  3 // Copyright (c) 2014, Insignal Co., Ltd.
  4 //
  5 //  Author: Claude <claude@insginal.co.kr>
  6 
  7 #include <linux/module.h>
  8 #include <linux/of_device.h>
  9 #include <linux/platform_device.h>
 10 #include <linux/clk.h>
 11 
 12 #include <sound/soc.h>
 13 #include <sound/soc-dapm.h>
 14 #include <sound/pcm.h>
 15 #include <sound/pcm_params.h>
 16 
 17 #include "i2s.h"
 18 
 19 static int arndale_hw_params(struct snd_pcm_substream *substream,
 20         struct snd_pcm_hw_params *params)
 21 {
 22         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 23         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 24         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 25         int rfs, ret;
 26         unsigned long rclk;
 27 
 28         rfs = 256;
 29 
 30         rclk = params_rate(params) * rfs;
 31 
 32         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
 33                                         0, SND_SOC_CLOCK_OUT);
 34         if (ret < 0)
 35                 return ret;
 36 
 37         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
 38                                         0, SND_SOC_CLOCK_OUT);
 39 
 40         if (ret < 0)
 41                 return ret;
 42 
 43         ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk, SND_SOC_CLOCK_OUT);
 44         if (ret < 0)
 45                 return ret;
 46 
 47         return 0;
 48 }
 49 
 50 static struct snd_soc_ops arndale_ops = {
 51         .hw_params = arndale_hw_params,
 52 };
 53 
 54 SND_SOC_DAILINK_DEFS(rt5631_hifi,
 55         DAILINK_COMP_ARRAY(COMP_EMPTY()),
 56         DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "rt5631-hifi")),
 57         DAILINK_COMP_ARRAY(COMP_EMPTY()));
 58 
 59 static struct snd_soc_dai_link arndale_rt5631_dai[] = {
 60         {
 61                 .name = "RT5631 HiFi",
 62                 .stream_name = "Primary",
 63                 .dai_fmt = SND_SOC_DAIFMT_I2S
 64                         | SND_SOC_DAIFMT_NB_NF
 65                         | SND_SOC_DAIFMT_CBS_CFS,
 66                 .ops = &arndale_ops,
 67                 SND_SOC_DAILINK_REG(rt5631_hifi),
 68         },
 69 };
 70 
 71 static struct snd_soc_card arndale_rt5631 = {
 72         .name = "Arndale RT5631",
 73         .owner = THIS_MODULE,
 74         .dai_link = arndale_rt5631_dai,
 75         .num_links = ARRAY_SIZE(arndale_rt5631_dai),
 76 };
 77 
 78 static void arndale_put_of_nodes(struct snd_soc_card *card)
 79 {
 80         struct snd_soc_dai_link *dai_link;
 81         int i;
 82 
 83         for_each_card_prelinks(card, i, dai_link) {
 84                 of_node_put(dai_link->cpus->of_node);
 85                 of_node_put(dai_link->codecs->of_node);
 86         }
 87 }
 88 
 89 static int arndale_audio_probe(struct platform_device *pdev)
 90 {
 91         int n, ret;
 92         struct device_node *np = pdev->dev.of_node;
 93         struct snd_soc_card *card = &arndale_rt5631;
 94 
 95         card->dev = &pdev->dev;
 96 
 97         for (n = 0; np && n < ARRAY_SIZE(arndale_rt5631_dai); n++) {
 98                 if (!arndale_rt5631_dai[n].cpus->dai_name) {
 99                         arndale_rt5631_dai[n].cpus->of_node = of_parse_phandle(np,
100                                         "samsung,audio-cpu", n);
101 
102                         if (!arndale_rt5631_dai[n].cpus->of_node) {
103                                 dev_err(&pdev->dev,
104                                 "Property 'samsung,audio-cpu' missing or invalid\n");
105                                 return -EINVAL;
106                         }
107                 }
108                 if (!arndale_rt5631_dai[n].platforms->name)
109                         arndale_rt5631_dai[n].platforms->of_node =
110                                         arndale_rt5631_dai[n].cpus->of_node;
111 
112                 arndale_rt5631_dai[n].codecs->name = NULL;
113                 arndale_rt5631_dai[n].codecs->of_node = of_parse_phandle(np,
114                                         "samsung,audio-codec", n);
115                 if (!arndale_rt5631_dai[0].codecs->of_node) {
116                         dev_err(&pdev->dev,
117                         "Property 'samsung,audio-codec' missing or invalid\n");
118                         ret = -EINVAL;
119                         goto err_put_of_nodes;
120                 }
121         }
122 
123         ret = devm_snd_soc_register_card(card->dev, card);
124         if (ret) {
125                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
126                 goto err_put_of_nodes;
127         }
128         return 0;
129 
130 err_put_of_nodes:
131         arndale_put_of_nodes(card);
132         return ret;
133 }
134 
135 static int arndale_audio_remove(struct platform_device *pdev)
136 {
137         struct snd_soc_card *card = platform_get_drvdata(pdev);
138 
139         arndale_put_of_nodes(card);
140         return 0;
141 }
142 
143 static const struct of_device_id samsung_arndale_rt5631_of_match[] __maybe_unused = {
144         { .compatible = "samsung,arndale-rt5631", },
145         { .compatible = "samsung,arndale-alc5631", },
146         {},
147 };
148 MODULE_DEVICE_TABLE(of, samsung_arndale_rt5631_of_match);
149 
150 static struct platform_driver arndale_audio_driver = {
151         .driver = {
152                 .name   = "arndale-audio",
153                 .pm = &snd_soc_pm_ops,
154                 .of_match_table = of_match_ptr(samsung_arndale_rt5631_of_match),
155         },
156         .probe = arndale_audio_probe,
157         .remove = arndale_audio_remove,
158 };
159 
160 module_platform_driver(arndale_audio_driver);
161 
162 MODULE_AUTHOR("Claude <claude@insignal.co.kr>");
163 MODULE_DESCRIPTION("ALSA SoC Driver for Arndale Board");
164 MODULE_LICENSE("GPL");
165 

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