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1// SPDX-License-Identifier: GPL-2.02//3// Copyright (C) 2017 Samsung Electronics Co., Ltd.4 5#include <linux/clk.h>6#include <linux/clk-provider.h>7#include <linux/of.h>8#include <linux/module.h>9#include <sound/soc.h>10#include <sound/pcm_params.h>11#include "i2s.h"12#include "i2s-regs.h"13 14struct odroid_priv {15 struct snd_soc_card card;16 struct clk *clk_i2s_bus;17 struct clk *sclk_i2s;18 19 /* Spinlock protecting fields below */20 spinlock_t lock;21 unsigned int be_sample_rate;22 bool be_active;23};24 25static int odroid_card_fe_startup(struct snd_pcm_substream *substream)26{27 struct snd_pcm_runtime *runtime = substream->runtime;28 29 snd_pcm_hw_constraint_single(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2);30 31 return 0;32}33 34static int odroid_card_fe_hw_params(struct snd_pcm_substream *substream,35 struct snd_pcm_hw_params *params)36{37 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);38 struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);39 unsigned long flags;40 int ret = 0;41 42 spin_lock_irqsave(&priv->lock, flags);43 if (priv->be_active && priv->be_sample_rate != params_rate(params))44 ret = -EINVAL;45 spin_unlock_irqrestore(&priv->lock, flags);46 47 return ret;48}49 50static const struct snd_soc_ops odroid_card_fe_ops = {51 .startup = odroid_card_fe_startup,52 .hw_params = odroid_card_fe_hw_params,53};54 55static int odroid_card_be_hw_params(struct snd_pcm_substream *substream,56 struct snd_pcm_hw_params *params)57{58 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);59 struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);60 unsigned int pll_freq, rclk_freq, rfs;61 unsigned long flags;62 int ret;63 64 switch (params_rate(params)) {65 case 64000:66 pll_freq = 196608001U;67 rfs = 384;68 break;69 case 44100:70 case 88200:71 pll_freq = 180633609U;72 rfs = 512;73 break;74 case 32000:75 case 48000:76 case 96000:77 pll_freq = 196608001U;78 rfs = 512;79 break;80 default:81 return -EINVAL;82 }83 84 ret = clk_set_rate(priv->clk_i2s_bus, pll_freq / 2 + 1);85 if (ret < 0)86 return ret;87 88 /*89 * We add 2 to the rclk_freq value in order to avoid too low clock90 * frequency values due to the EPLL output frequency not being exact91 * multiple of the audio sampling rate.92 */93 rclk_freq = params_rate(params) * rfs + 2;94 95 ret = clk_set_rate(priv->sclk_i2s, rclk_freq);96 if (ret < 0)97 return ret;98 99 if (rtd->dai_link->num_codecs > 1) {100 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 1);101 102 ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk_freq,103 SND_SOC_CLOCK_IN);104 if (ret < 0)105 return ret;106 }107 108 spin_lock_irqsave(&priv->lock, flags);109 priv->be_sample_rate = params_rate(params);110 spin_unlock_irqrestore(&priv->lock, flags);111 112 return 0;113}114 115static int odroid_card_be_trigger(struct snd_pcm_substream *substream, int cmd)116{117 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);118 struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);119 unsigned long flags;120 121 spin_lock_irqsave(&priv->lock, flags);122 123 switch (cmd) {124 case SNDRV_PCM_TRIGGER_START:125 case SNDRV_PCM_TRIGGER_RESUME:126 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:127 priv->be_active = true;128 break;129 130 case SNDRV_PCM_TRIGGER_STOP:131 case SNDRV_PCM_TRIGGER_SUSPEND:132 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:133 priv->be_active = false;134 break;135 }136 137 spin_unlock_irqrestore(&priv->lock, flags);138 139 return 0;140}141 142static const struct snd_soc_ops odroid_card_be_ops = {143 .hw_params = odroid_card_be_hw_params,144 .trigger = odroid_card_be_trigger,145};146 147/* DAPM routes for backward compatibility with old DTS */148static const struct snd_soc_dapm_route odroid_dapm_routes[] = {149 { "I2S Playback", NULL, "Mixer DAI TX" },150 { "HiFi Playback", NULL, "Mixer DAI TX" },151};152 153SND_SOC_DAILINK_DEFS(primary,154 DAILINK_COMP_ARRAY(COMP_EMPTY()),155 DAILINK_COMP_ARRAY(COMP_DUMMY()),156 DAILINK_COMP_ARRAY(COMP_PLATFORM("3830000.i2s")));157 158SND_SOC_DAILINK_DEFS(mixer,159 DAILINK_COMP_ARRAY(COMP_DUMMY()),160 DAILINK_COMP_ARRAY(COMP_EMPTY()));161 162SND_SOC_DAILINK_DEFS(secondary,163 DAILINK_COMP_ARRAY(COMP_EMPTY()),164 DAILINK_COMP_ARRAY(COMP_DUMMY()),165 DAILINK_COMP_ARRAY(COMP_PLATFORM("3830000.i2s-sec")));166 167static struct snd_soc_dai_link odroid_card_dais[] = {168 {169 /* Primary FE <-> BE link */170 .ops = &odroid_card_fe_ops,171 .name = "Primary",172 .stream_name = "Primary",173 .dynamic = 1,174 .dpcm_playback = 1,175 SND_SOC_DAILINK_REG(primary),176 }, {177 /* BE <-> CODECs link */178 .name = "I2S Mixer",179 .ops = &odroid_card_be_ops,180 .no_pcm = 1,181 .dpcm_playback = 1,182 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |183 SND_SOC_DAIFMT_CBS_CFS,184 SND_SOC_DAILINK_REG(mixer),185 }, {186 /* Secondary FE <-> BE link */187 .playback_only = 1,188 .ops = &odroid_card_fe_ops,189 .name = "Secondary",190 .stream_name = "Secondary",191 .dynamic = 1,192 .dpcm_playback = 1,193 SND_SOC_DAILINK_REG(secondary),194 }195};196 197static int odroid_audio_probe(struct platform_device *pdev)198{199 struct device *dev = &pdev->dev;200 struct device_node *cpu_dai = NULL;201 struct device_node *cpu, *codec;202 struct odroid_priv *priv;203 struct snd_soc_card *card;204 struct snd_soc_dai_link *link, *codec_link;205 int num_pcms, ret, i;206 207 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);208 if (!priv)209 return -ENOMEM;210 211 card = &priv->card;212 card->dev = dev;213 214 card->owner = THIS_MODULE;215 card->fully_routed = true;216 217 spin_lock_init(&priv->lock);218 snd_soc_card_set_drvdata(card, priv);219 220 ret = snd_soc_of_parse_card_name(card, "model");221 if (ret < 0)222 return ret;223 224 if (of_property_present(dev->of_node, "samsung,audio-widgets")) {225 ret = snd_soc_of_parse_audio_simple_widgets(card,226 "samsung,audio-widgets");227 if (ret < 0)228 return ret;229 }230 231 ret = 0;232 if (of_property_present(dev->of_node, "audio-routing"))233 ret = snd_soc_of_parse_audio_routing(card, "audio-routing");234 else if (of_property_present(dev->of_node, "samsung,audio-routing"))235 ret = snd_soc_of_parse_audio_routing(card, "samsung,audio-routing");236 if (ret < 0)237 return ret;238 239 card->dai_link = odroid_card_dais;240 card->num_links = ARRAY_SIZE(odroid_card_dais);241 242 cpu = of_get_child_by_name(dev->of_node, "cpu");243 codec = of_get_child_by_name(dev->of_node, "codec");244 link = card->dai_link;245 codec_link = &card->dai_link[1];246 247 /*248 * For backwards compatibility create the secondary CPU DAI link only249 * if there are 2 CPU DAI entries in the cpu sound-dai property in DT.250 * Also add required DAPM routes not available in old DTS.251 */252 num_pcms = of_count_phandle_with_args(cpu, "sound-dai",253 "#sound-dai-cells");254 if (num_pcms == 1) {255 card->dapm_routes = odroid_dapm_routes;256 card->num_dapm_routes = ARRAY_SIZE(odroid_dapm_routes);257 card->num_links--;258 }259 260 for (i = 0; i < num_pcms; i++, link += 2) {261 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name, i);262 if (ret < 0)263 break;264 }265 if (ret == 0) {266 cpu_dai = of_parse_phandle(cpu, "sound-dai", 0);267 if (!cpu_dai)268 ret = -EINVAL;269 }270 271 of_node_put(cpu);272 if (ret < 0)273 goto err_put_node;274 275 ret = snd_soc_of_get_dai_link_codecs(dev, codec, codec_link);276 if (ret < 0)277 goto err_put_cpu_dai;278 279 /* Set capture capability only for boards with the MAX98090 CODEC */280 if (codec_link->num_codecs > 1) {281 card->dai_link[0].dpcm_capture = 1;282 card->dai_link[1].dpcm_capture = 1;283 }284 285 priv->sclk_i2s = of_clk_get_by_name(cpu_dai, "i2s_opclk1");286 if (IS_ERR(priv->sclk_i2s)) {287 ret = PTR_ERR(priv->sclk_i2s);288 goto err_put_cpu_dai;289 }290 291 priv->clk_i2s_bus = of_clk_get_by_name(cpu_dai, "iis");292 if (IS_ERR(priv->clk_i2s_bus)) {293 ret = PTR_ERR(priv->clk_i2s_bus);294 goto err_put_sclk;295 }296 297 ret = devm_snd_soc_register_card(dev, card);298 if (ret < 0) {299 dev_err_probe(dev, ret, "snd_soc_register_card() failed\n");300 goto err_put_clk_i2s;301 }302 303 of_node_put(cpu_dai);304 of_node_put(codec);305 return 0;306 307err_put_clk_i2s:308 clk_put(priv->clk_i2s_bus);309err_put_sclk:310 clk_put(priv->sclk_i2s);311err_put_cpu_dai:312 of_node_put(cpu_dai);313 snd_soc_of_put_dai_link_codecs(codec_link);314err_put_node:315 of_node_put(codec);316 return ret;317}318 319static void odroid_audio_remove(struct platform_device *pdev)320{321 struct odroid_priv *priv = platform_get_drvdata(pdev);322 323 snd_soc_of_put_dai_link_codecs(&priv->card.dai_link[1]);324 clk_put(priv->sclk_i2s);325 clk_put(priv->clk_i2s_bus);326}327 328static const struct of_device_id odroid_audio_of_match[] = {329 { .compatible = "hardkernel,odroid-xu3-audio" },330 { .compatible = "hardkernel,odroid-xu4-audio" },331 { .compatible = "samsung,odroid-xu3-audio" },332 { .compatible = "samsung,odroid-xu4-audio" },333 { },334};335MODULE_DEVICE_TABLE(of, odroid_audio_of_match);336 337static struct platform_driver odroid_audio_driver = {338 .driver = {339 .name = "odroid-audio",340 .of_match_table = odroid_audio_of_match,341 .pm = &snd_soc_pm_ops,342 },343 .probe = odroid_audio_probe,344 .remove = odroid_audio_remove,345};346module_platform_driver(odroid_audio_driver);347 348MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");349MODULE_DESCRIPTION("Odroid XU3/XU4 audio support");350MODULE_LICENSE("GPL v2");351