1 /* 2 * Copyright (C) 2017 Samsung Electronics Co., Ltd. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 9 #include <linux/clk.h> 10 #include <linux/of.h> 11 #include <linux/of_device.h> 12 #include <linux/module.h> 13 #include <sound/soc.h> 14 #include <sound/pcm_params.h> 15 #include "i2s.h" 16 #include "i2s-regs.h" 17 18 struct odroid_priv { 19 struct snd_soc_card card; 20 struct snd_soc_dai_link dai_link; 21 22 struct clk *pll; 23 struct clk *rclk; 24 }; 25 26 static int odroid_card_startup(struct snd_pcm_substream *substream) 27 { 28 struct snd_pcm_runtime *runtime = substream->runtime; 29 30 snd_pcm_hw_constraint_single(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2); 31 return 0; 32 } 33 34 static int odroid_card_hw_params(struct snd_pcm_substream *substream, 35 struct snd_pcm_hw_params *params) 36 { 37 struct snd_soc_pcm_runtime *rtd = substream->private_data; 38 struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card); 39 unsigned int pll_freq, rclk_freq; 40 int ret; 41 42 switch (params_rate(params)) { 43 case 32000: 44 case 64000: 45 pll_freq = 131072000U; 46 break; 47 case 44100: 48 case 88200: 49 case 176400: 50 pll_freq = 180633600U; 51 break; 52 case 48000: 53 case 96000: 54 case 192000: 55 pll_freq = 196608000U; 56 break; 57 default: 58 return -EINVAL; 59 } 60 61 ret = clk_set_rate(priv->pll, pll_freq + 1); 62 if (ret < 0) 63 return ret; 64 65 rclk_freq = params_rate(params) * 256 * 4; 66 67 ret = clk_set_rate(priv->rclk, rclk_freq); 68 if (ret < 0) 69 return ret; 70 71 if (rtd->num_codecs > 1) { 72 struct snd_soc_dai *codec_dai = rtd->codec_dais[1]; 73 74 ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk_freq, 75 SND_SOC_CLOCK_IN); 76 if (ret < 0) 77 return ret; 78 } 79 80 return 0; 81 } 82 83 static const struct snd_soc_ops odroid_card_ops = { 84 .startup = odroid_card_startup, 85 .hw_params = odroid_card_hw_params, 86 }; 87 88 static void odroid_put_codec_of_nodes(struct snd_soc_dai_link *link) 89 { 90 struct snd_soc_dai_link_component *component = link->codecs; 91 int i; 92 93 for (i = 0; i < link->num_codecs; i++, component++) { 94 if (!component->of_node) 95 break; 96 of_node_put(component->of_node); 97 } 98 } 99 100 static int odroid_audio_probe(struct platform_device *pdev) 101 { 102 struct device *dev = &pdev->dev; 103 struct device_node *cpu, *codec; 104 struct odroid_priv *priv; 105 struct snd_soc_dai_link *link; 106 struct snd_soc_card *card; 107 int ret; 108 109 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 110 if (!priv) 111 return -ENOMEM; 112 113 card = &priv->card; 114 card->dev = dev; 115 116 card->owner = THIS_MODULE; 117 card->fully_routed = true; 118 119 snd_soc_card_set_drvdata(card, priv); 120 121 priv->pll = devm_clk_get(dev, "epll"); 122 if (IS_ERR(priv->pll)) 123 return PTR_ERR(priv->pll); 124 125 priv->rclk = devm_clk_get(dev, "i2s_rclk"); 126 if (IS_ERR(priv->rclk)) 127 return PTR_ERR(priv->rclk); 128 129 ret = snd_soc_of_parse_card_name(card, "model"); 130 if (ret < 0) 131 return ret; 132 133 if (of_property_read_bool(dev->of_node, "samsung,audio-widgets")) { 134 ret = snd_soc_of_parse_audio_simple_widgets(card, 135 "samsung,audio-widgets"); 136 if (ret < 0) 137 return ret; 138 } 139 140 if (of_property_read_bool(dev->of_node, "samsung,audio-routing")) { 141 ret = snd_soc_of_parse_audio_routing(card, 142 "samsung,audio-routing"); 143 if (ret < 0) 144 return ret; 145 } 146 147 link = &priv->dai_link; 148 149 link->ops = &odroid_card_ops; 150 link->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | 151 SND_SOC_DAIFMT_CBS_CFS; 152 153 card->dai_link = &priv->dai_link; 154 card->num_links = 1; 155 156 cpu = of_get_child_by_name(dev->of_node, "cpu"); 157 codec = of_get_child_by_name(dev->of_node, "codec"); 158 159 link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0); 160 if (!link->cpu_of_node) { 161 dev_err(dev, "Failed parsing cpu/sound-dai property\n"); 162 return -EINVAL; 163 } 164 165 ret = snd_soc_of_get_dai_link_codecs(dev, codec, link); 166 if (ret < 0) 167 goto err_put_codec_n; 168 169 link->platform_of_node = link->cpu_of_node; 170 171 link->name = "Primary"; 172 link->stream_name = link->name; 173 174 ret = devm_snd_soc_register_card(dev, card); 175 if (ret < 0) { 176 dev_err(dev, "snd_soc_register_card() failed: %d\n", ret); 177 goto err_put_i2s_n; 178 } 179 180 return 0; 181 182 err_put_i2s_n: 183 of_node_put(link->cpu_of_node); 184 err_put_codec_n: 185 odroid_put_codec_of_nodes(link); 186 return ret; 187 } 188 189 static int odroid_audio_remove(struct platform_device *pdev) 190 { 191 struct odroid_priv *priv = platform_get_drvdata(pdev); 192 193 of_node_put(priv->dai_link.cpu_of_node); 194 odroid_put_codec_of_nodes(&priv->dai_link); 195 196 return 0; 197 } 198 199 static const struct of_device_id odroid_audio_of_match[] = { 200 { .compatible = "samsung,odroid-xu3-audio" }, 201 { .compatible = "samsung,odroid-xu4-audio"}, 202 { }, 203 }; 204 MODULE_DEVICE_TABLE(of, odroid_audio_of_match); 205 206 static struct platform_driver odroid_audio_driver = { 207 .driver = { 208 .name = "odroid-audio", 209 .of_match_table = odroid_audio_of_match, 210 .pm = &snd_soc_pm_ops, 211 }, 212 .probe = odroid_audio_probe, 213 .remove = odroid_audio_remove, 214 }; 215 module_platform_driver(odroid_audio_driver); 216 217 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>"); 218 MODULE_DESCRIPTION("Odroid XU3/XU4 audio support"); 219 MODULE_LICENSE("GPL v2"); 220