1 /* 2 * ASoC machine driver for Snow boards 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * version 2 as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 */ 13 14 #include <linux/module.h> 15 #include <linux/platform_device.h> 16 #include <linux/of.h> 17 #include <linux/of_device.h> 18 19 #include <sound/soc.h> 20 21 #include "i2s.h" 22 23 #define FIN_PLL_RATE 24000000 24 25 static struct snd_soc_dai_link snow_dai[] = { 26 { 27 .name = "Primary", 28 .stream_name = "Primary", 29 .codec_dai_name = "HiFi", 30 .dai_fmt = SND_SOC_DAIFMT_I2S | 31 SND_SOC_DAIFMT_NB_NF | 32 SND_SOC_DAIFMT_CBS_CFS, 33 }, 34 }; 35 36 static int snow_late_probe(struct snd_soc_card *card) 37 { 38 struct snd_soc_pcm_runtime *rtd; 39 struct snd_soc_dai *codec_dai; 40 struct snd_soc_dai *cpu_dai; 41 int ret; 42 43 rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name); 44 codec_dai = rtd->codec_dai; 45 cpu_dai = rtd->cpu_dai; 46 47 /* Set the MCLK rate for the codec */ 48 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 49 FIN_PLL_RATE, SND_SOC_CLOCK_IN); 50 if (ret < 0) 51 return ret; 52 53 /* Select I2S Bus clock to set RCLK and BCLK */ 54 ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0, 55 0, SND_SOC_CLOCK_IN); 56 if (ret < 0) 57 return ret; 58 59 return 0; 60 } 61 62 static struct snd_soc_card snow_snd = { 63 .name = "Snow-I2S", 64 .owner = THIS_MODULE, 65 .dai_link = snow_dai, 66 .num_links = ARRAY_SIZE(snow_dai), 67 68 .late_probe = snow_late_probe, 69 }; 70 71 static int snow_probe(struct platform_device *pdev) 72 { 73 struct snd_soc_card *card = &snow_snd; 74 struct device_node *i2s_node, *codec_node; 75 int i, ret; 76 77 i2s_node = of_parse_phandle(pdev->dev.of_node, 78 "samsung,i2s-controller", 0); 79 if (!i2s_node) { 80 dev_err(&pdev->dev, 81 "Property 'i2s-controller' missing or invalid\n"); 82 return -EINVAL; 83 } 84 85 codec_node = of_parse_phandle(pdev->dev.of_node, 86 "samsung,audio-codec", 0); 87 if (!codec_node) { 88 dev_err(&pdev->dev, 89 "Property 'audio-codec' missing or invalid\n"); 90 return -EINVAL; 91 } 92 93 for (i = 0; i < ARRAY_SIZE(snow_dai); i++) { 94 snow_dai[i].codec_of_node = codec_node; 95 snow_dai[i].cpu_of_node = i2s_node; 96 snow_dai[i].platform_of_node = i2s_node; 97 } 98 99 card->dev = &pdev->dev; 100 101 /* Update card-name if provided through DT, else use default name */ 102 snd_soc_of_parse_card_name(card, "samsung,model"); 103 104 ret = devm_snd_soc_register_card(&pdev->dev, card); 105 if (ret) { 106 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret); 107 return ret; 108 } 109 110 return ret; 111 } 112 113 static const struct of_device_id snow_of_match[] = { 114 { .compatible = "google,snow-audio-max98090", }, 115 { .compatible = "google,snow-audio-max98091", }, 116 { .compatible = "google,snow-audio-max98095", }, 117 {}, 118 }; 119 MODULE_DEVICE_TABLE(of, snow_of_match); 120 121 static struct platform_driver snow_driver = { 122 .driver = { 123 .name = "snow-audio", 124 .pm = &snd_soc_pm_ops, 125 .of_match_table = snow_of_match, 126 }, 127 .probe = snow_probe, 128 }; 129 130 module_platform_driver(snow_driver); 131 132 MODULE_DESCRIPTION("ALSA SoC Audio machine driver for Snow"); 133 MODULE_LICENSE("GPL"); 134