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Linux/sound/soc/mediatek/mt2701/mt2701-wm8960.c

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  1 /*
  2  * mt2701-wm8960.c  --  MT2701 WM8960 ALSA SoC machine driver
  3  *
  4  * Copyright (c) 2017 MediaTek Inc.
  5  * Author: Ryder Lee <ryder.lee@mediatek.com>
  6  *
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License version 2 and
  9  * only version 2 as published by the Free Software Foundation.
 10  *
 11  * This program is distributed in the hope that it will be useful,
 12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  * GNU General Public License for more details.
 15  */
 16 
 17 #include <linux/module.h>
 18 #include <sound/soc.h>
 19 
 20 #include "mt2701-afe-common.h"
 21 
 22 static const struct snd_soc_dapm_widget mt2701_wm8960_widgets[] = {
 23         SND_SOC_DAPM_HP("Headphone", NULL),
 24         SND_SOC_DAPM_MIC("AMIC", NULL),
 25 };
 26 
 27 static const struct snd_kcontrol_new mt2701_wm8960_controls[] = {
 28         SOC_DAPM_PIN_SWITCH("Headphone"),
 29         SOC_DAPM_PIN_SWITCH("AMIC"),
 30 };
 31 
 32 static int mt2701_wm8960_be_ops_hw_params(struct snd_pcm_substream *substream,
 33                                           struct snd_pcm_hw_params *params)
 34 {
 35         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 36         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 37         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 38         unsigned int mclk_rate;
 39         unsigned int rate = params_rate(params);
 40         unsigned int div_mclk_over_bck = rate > 192000 ? 2 : 4;
 41         unsigned int div_bck_over_lrck = 64;
 42 
 43         mclk_rate = rate * div_bck_over_lrck * div_mclk_over_bck;
 44 
 45         snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, SND_SOC_CLOCK_OUT);
 46         snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, SND_SOC_CLOCK_IN);
 47 
 48         return 0;
 49 }
 50 
 51 static struct snd_soc_ops mt2701_wm8960_be_ops = {
 52         .hw_params = mt2701_wm8960_be_ops_hw_params
 53 };
 54 
 55 static struct snd_soc_dai_link mt2701_wm8960_dai_links[] = {
 56         /* FE */
 57         {
 58                 .name = "wm8960-playback",
 59                 .stream_name = "wm8960-playback",
 60                 .cpu_dai_name = "PCMO0",
 61                 .codec_name = "snd-soc-dummy",
 62                 .codec_dai_name = "snd-soc-dummy-dai",
 63                 .trigger = {SND_SOC_DPCM_TRIGGER_POST,
 64                             SND_SOC_DPCM_TRIGGER_POST},
 65                 .dynamic = 1,
 66                 .dpcm_playback = 1,
 67         },
 68         {
 69                 .name = "wm8960-capture",
 70                 .stream_name = "wm8960-capture",
 71                 .cpu_dai_name = "PCM0",
 72                 .codec_name = "snd-soc-dummy",
 73                 .codec_dai_name = "snd-soc-dummy-dai",
 74                 .trigger = {SND_SOC_DPCM_TRIGGER_POST,
 75                             SND_SOC_DPCM_TRIGGER_POST},
 76                 .dynamic = 1,
 77                 .dpcm_capture = 1,
 78         },
 79         /* BE */
 80         {
 81                 .name = "wm8960-codec",
 82                 .cpu_dai_name = "I2S0",
 83                 .no_pcm = 1,
 84                 .codec_dai_name = "wm8960-hifi",
 85                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
 86                         | SND_SOC_DAIFMT_GATED,
 87                 .ops = &mt2701_wm8960_be_ops,
 88                 .dpcm_playback = 1,
 89                 .dpcm_capture = 1,
 90         },
 91 };
 92 
 93 static struct snd_soc_card mt2701_wm8960_card = {
 94         .name = "mt2701-wm8960",
 95         .owner = THIS_MODULE,
 96         .dai_link = mt2701_wm8960_dai_links,
 97         .num_links = ARRAY_SIZE(mt2701_wm8960_dai_links),
 98         .controls = mt2701_wm8960_controls,
 99         .num_controls = ARRAY_SIZE(mt2701_wm8960_controls),
100         .dapm_widgets = mt2701_wm8960_widgets,
101         .num_dapm_widgets = ARRAY_SIZE(mt2701_wm8960_widgets),
102 };
103 
104 static int mt2701_wm8960_machine_probe(struct platform_device *pdev)
105 {
106         struct snd_soc_card *card = &mt2701_wm8960_card;
107         struct device_node *platform_node, *codec_node;
108         int ret, i;
109 
110         platform_node = of_parse_phandle(pdev->dev.of_node,
111                                          "mediatek,platform", 0);
112         if (!platform_node) {
113                 dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
114                 return -EINVAL;
115         }
116         for (i = 0; i < card->num_links; i++) {
117                 if (mt2701_wm8960_dai_links[i].platform_name)
118                         continue;
119                 mt2701_wm8960_dai_links[i].platform_of_node = platform_node;
120         }
121 
122         card->dev = &pdev->dev;
123 
124         codec_node = of_parse_phandle(pdev->dev.of_node,
125                                       "mediatek,audio-codec", 0);
126         if (!codec_node) {
127                 dev_err(&pdev->dev,
128                         "Property 'audio-codec' missing or invalid\n");
129                 return -EINVAL;
130         }
131         for (i = 0; i < card->num_links; i++) {
132                 if (mt2701_wm8960_dai_links[i].codec_name)
133                         continue;
134                 mt2701_wm8960_dai_links[i].codec_of_node = codec_node;
135         }
136 
137         ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
138         if (ret) {
139                 dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
140                 return ret;
141         }
142 
143         ret = devm_snd_soc_register_card(&pdev->dev, card);
144         if (ret)
145                 dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
146                         __func__, ret);
147 
148         return ret;
149 }
150 
151 #ifdef CONFIG_OF
152 static const struct of_device_id mt2701_wm8960_machine_dt_match[] = {
153         {.compatible = "mediatek,mt2701-wm8960-machine",},
154         {}
155 };
156 #endif
157 
158 static struct platform_driver mt2701_wm8960_machine = {
159         .driver = {
160                 .name = "mt2701-wm8960",
161                 .owner = THIS_MODULE,
162 #ifdef CONFIG_OF
163                 .of_match_table = mt2701_wm8960_machine_dt_match,
164 #endif
165         },
166         .probe = mt2701_wm8960_machine_probe,
167 };
168 
169 module_platform_driver(mt2701_wm8960_machine);
170 
171 /* Module information */
172 MODULE_DESCRIPTION("MT2701 WM8960 ALSA SoC machine driver");
173 MODULE_AUTHOR("Ryder Lee <ryder.lee@mediatek.com>");
174 MODULE_LICENSE("GPL v2");
175 MODULE_ALIAS("mt2701 wm8960 soc card");
176 
177 

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