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