1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (C) 2017 Samsung Electronics Co., Ltd.
6 #include <linux/clk-provider.h>
8 #include <linux/module.h>
10 #include <sound/pcm_params.h>
15 struct snd_soc_card card;
16 struct clk *clk_i2s_bus;
19 /* Spinlock protecting fields below */
21 unsigned int be_sample_rate;
25 static int odroid_card_fe_startup(struct snd_pcm_substream *substream)
27 struct snd_pcm_runtime *runtime = substream->runtime;
29 snd_pcm_hw_constraint_single(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2);
34 static int odroid_card_fe_hw_params(struct snd_pcm_substream *substream,
35 struct snd_pcm_hw_params *params)
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);
42 spin_lock_irqsave(&priv->lock, flags);
43 if (priv->be_active && priv->be_sample_rate != params_rate(params))
45 spin_unlock_irqrestore(&priv->lock, flags);
50 static const struct snd_soc_ops odroid_card_fe_ops = {
51 .startup = odroid_card_fe_startup,
52 .hw_params = odroid_card_fe_hw_params,
55 static int odroid_card_be_hw_params(struct snd_pcm_substream *substream,
56 struct snd_pcm_hw_params *params)
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;
64 switch (params_rate(params)) {
66 pll_freq = 196608001U;
71 pll_freq = 180633609U;
77 pll_freq = 196608001U;
84 ret = clk_set_rate(priv->clk_i2s_bus, pll_freq / 2 + 1);
89 * We add 2 to the rclk_freq value in order to avoid too low clock
90 * frequency values due to the EPLL output frequency not being exact
91 * multiple of the audio sampling rate.
93 rclk_freq = params_rate(params) * rfs + 2;
95 ret = clk_set_rate(priv->sclk_i2s, rclk_freq);
99 if (rtd->dai_link->num_codecs > 1) {
100 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 1);
102 ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk_freq,
108 spin_lock_irqsave(&priv->lock, flags);
109 priv->be_sample_rate = params_rate(params);
110 spin_unlock_irqrestore(&priv->lock, flags);
115 static int odroid_card_be_trigger(struct snd_pcm_substream *substream, int cmd)
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);
121 spin_lock_irqsave(&priv->lock, flags);
124 case SNDRV_PCM_TRIGGER_START:
125 case SNDRV_PCM_TRIGGER_RESUME:
126 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
127 priv->be_active = true;
130 case SNDRV_PCM_TRIGGER_STOP:
131 case SNDRV_PCM_TRIGGER_SUSPEND:
132 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
133 priv->be_active = false;
137 spin_unlock_irqrestore(&priv->lock, flags);
142 static const struct snd_soc_ops odroid_card_be_ops = {
143 .hw_params = odroid_card_be_hw_params,
144 .trigger = odroid_card_be_trigger,
147 /* DAPM routes for backward compatibility with old DTS */
148 static const struct snd_soc_dapm_route odroid_dapm_routes[] = {
149 { "I2S Playback", NULL, "Mixer DAI TX" },
150 { "HiFi Playback", NULL, "Mixer DAI TX" },
153 SND_SOC_DAILINK_DEFS(primary,
154 DAILINK_COMP_ARRAY(COMP_EMPTY()),
155 DAILINK_COMP_ARRAY(COMP_DUMMY()),
156 DAILINK_COMP_ARRAY(COMP_PLATFORM("3830000.i2s")));
158 SND_SOC_DAILINK_DEFS(mixer,
159 DAILINK_COMP_ARRAY(COMP_DUMMY()),
160 DAILINK_COMP_ARRAY(COMP_EMPTY()),
161 DAILINK_COMP_ARRAY(COMP_DUMMY()));
163 SND_SOC_DAILINK_DEFS(secondary,
164 DAILINK_COMP_ARRAY(COMP_EMPTY()),
165 DAILINK_COMP_ARRAY(COMP_DUMMY()),
166 DAILINK_COMP_ARRAY(COMP_PLATFORM("3830000.i2s-sec")));
168 static struct snd_soc_dai_link odroid_card_dais[] = {
170 /* Primary FE <-> BE link */
171 .ops = &odroid_card_fe_ops,
173 .stream_name = "Primary",
176 SND_SOC_DAILINK_REG(primary),
178 /* BE <-> CODECs link */
180 .ops = &odroid_card_be_ops,
183 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
184 SND_SOC_DAIFMT_CBS_CFS,
185 SND_SOC_DAILINK_REG(mixer),
187 /* Secondary FE <-> BE link */
189 .ops = &odroid_card_fe_ops,
191 .stream_name = "Secondary",
194 SND_SOC_DAILINK_REG(secondary),
198 static int odroid_audio_probe(struct platform_device *pdev)
200 struct device *dev = &pdev->dev;
201 struct device_node *cpu_dai = NULL;
202 struct device_node *cpu, *codec;
203 struct odroid_priv *priv;
204 struct snd_soc_card *card;
205 struct snd_soc_dai_link *link, *codec_link;
206 int num_pcms, ret, i;
208 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
215 card->owner = THIS_MODULE;
216 card->fully_routed = true;
218 spin_lock_init(&priv->lock);
219 snd_soc_card_set_drvdata(card, priv);
221 ret = snd_soc_of_parse_card_name(card, "model");
225 if (of_property_present(dev->of_node, "samsung,audio-widgets")) {
226 ret = snd_soc_of_parse_audio_simple_widgets(card,
227 "samsung,audio-widgets");
233 if (of_property_present(dev->of_node, "audio-routing"))
234 ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
235 else if (of_property_present(dev->of_node, "samsung,audio-routing"))
236 ret = snd_soc_of_parse_audio_routing(card, "samsung,audio-routing");
240 card->dai_link = odroid_card_dais;
241 card->num_links = ARRAY_SIZE(odroid_card_dais);
243 cpu = of_get_child_by_name(dev->of_node, "cpu");
244 codec = of_get_child_by_name(dev->of_node, "codec");
245 link = card->dai_link;
246 codec_link = &card->dai_link[1];
249 * For backwards compatibility create the secondary CPU DAI link only
250 * if there are 2 CPU DAI entries in the cpu sound-dai property in DT.
251 * Also add required DAPM routes not available in old DTS.
253 num_pcms = of_count_phandle_with_args(cpu, "sound-dai",
256 card->dapm_routes = odroid_dapm_routes;
257 card->num_dapm_routes = ARRAY_SIZE(odroid_dapm_routes);
261 for (i = 0; i < num_pcms; i++, link += 2) {
262 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name, i);
267 cpu_dai = of_parse_phandle(cpu, "sound-dai", 0);
276 ret = snd_soc_of_get_dai_link_codecs(dev, codec, codec_link);
278 goto err_put_cpu_dai;
280 /* Set capture capability only for boards with the MAX98090 CODEC */
281 if (codec_link->num_codecs > 1) {
282 card->dai_link[0].dpcm_capture = 1;
283 card->dai_link[1].dpcm_capture = 1;
286 priv->sclk_i2s = of_clk_get_by_name(cpu_dai, "i2s_opclk1");
287 if (IS_ERR(priv->sclk_i2s)) {
288 ret = PTR_ERR(priv->sclk_i2s);
289 goto err_put_cpu_dai;
292 priv->clk_i2s_bus = of_clk_get_by_name(cpu_dai, "iis");
293 if (IS_ERR(priv->clk_i2s_bus)) {
294 ret = PTR_ERR(priv->clk_i2s_bus);
298 ret = devm_snd_soc_register_card(dev, card);
300 dev_err_probe(dev, ret, "snd_soc_register_card() failed\n");
301 goto err_put_clk_i2s;
304 of_node_put(cpu_dai);
309 clk_put(priv->clk_i2s_bus);
311 clk_put(priv->sclk_i2s);
313 of_node_put(cpu_dai);
314 snd_soc_of_put_dai_link_codecs(codec_link);
320 static void odroid_audio_remove(struct platform_device *pdev)
322 struct odroid_priv *priv = platform_get_drvdata(pdev);
324 snd_soc_of_put_dai_link_codecs(&priv->card.dai_link[1]);
325 clk_put(priv->sclk_i2s);
326 clk_put(priv->clk_i2s_bus);
329 static const struct of_device_id odroid_audio_of_match[] = {
330 { .compatible = "hardkernel,odroid-xu3-audio" },
331 { .compatible = "hardkernel,odroid-xu4-audio" },
332 { .compatible = "samsung,odroid-xu3-audio" },
333 { .compatible = "samsung,odroid-xu4-audio" },
336 MODULE_DEVICE_TABLE(of, odroid_audio_of_match);
338 static struct platform_driver odroid_audio_driver = {
340 .name = "odroid-audio",
341 .of_match_table = odroid_audio_of_match,
342 .pm = &snd_soc_pm_ops,
344 .probe = odroid_audio_probe,
345 .remove_new = odroid_audio_remove,
347 module_platform_driver(odroid_audio_driver);
349 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
350 MODULE_DESCRIPTION("Odroid XU3/XU4 audio support");
351 MODULE_LICENSE("GPL v2");