1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (C) 2017 Samsung Electronics Co., Ltd.
6 #include <linux/clk-provider.h>
8 #include <linux/of_device.h>
9 #include <linux/module.h>
10 #include <sound/soc.h>
11 #include <sound/pcm_params.h>
16 struct snd_soc_card card;
17 struct clk *clk_i2s_bus;
20 /* Spinlock protecting fields below */
22 unsigned int be_sample_rate;
26 static int odroid_card_fe_startup(struct snd_pcm_substream *substream)
28 struct snd_pcm_runtime *runtime = substream->runtime;
30 snd_pcm_hw_constraint_single(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2);
35 static int odroid_card_fe_hw_params(struct snd_pcm_substream *substream,
36 struct snd_pcm_hw_params *params)
38 struct snd_soc_pcm_runtime *rtd = substream->private_data;
39 struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
43 spin_lock_irqsave(&priv->lock, flags);
44 if (priv->be_active && priv->be_sample_rate != params_rate(params))
46 spin_unlock_irqrestore(&priv->lock, flags);
51 static const struct snd_soc_ops odroid_card_fe_ops = {
52 .startup = odroid_card_fe_startup,
53 .hw_params = odroid_card_fe_hw_params,
56 static int odroid_card_be_hw_params(struct snd_pcm_substream *substream,
57 struct snd_pcm_hw_params *params)
59 struct snd_soc_pcm_runtime *rtd = substream->private_data;
60 struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
61 unsigned int pll_freq, rclk_freq, rfs;
65 switch (params_rate(params)) {
67 pll_freq = 196608001U;
72 pll_freq = 180633609U;
78 pll_freq = 196608001U;
85 ret = clk_set_rate(priv->clk_i2s_bus, pll_freq / 2 + 1);
90 * We add 2 to the rclk_freq value in order to avoid too low clock
91 * frequency values due to the EPLL output frequency not being exact
92 * multiple of the audio sampling rate.
94 rclk_freq = params_rate(params) * rfs + 2;
96 ret = clk_set_rate(priv->sclk_i2s, rclk_freq);
100 if (rtd->num_codecs > 1) {
101 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 1);
103 ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk_freq,
109 spin_lock_irqsave(&priv->lock, flags);
110 priv->be_sample_rate = params_rate(params);
111 spin_unlock_irqrestore(&priv->lock, flags);
116 static int odroid_card_be_trigger(struct snd_pcm_substream *substream, int cmd)
118 struct snd_soc_pcm_runtime *rtd = substream->private_data;
119 struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
122 spin_lock_irqsave(&priv->lock, flags);
125 case SNDRV_PCM_TRIGGER_START:
126 case SNDRV_PCM_TRIGGER_RESUME:
127 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
128 priv->be_active = true;
131 case SNDRV_PCM_TRIGGER_STOP:
132 case SNDRV_PCM_TRIGGER_SUSPEND:
133 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
134 priv->be_active = false;
138 spin_unlock_irqrestore(&priv->lock, flags);
143 static const struct snd_soc_ops odroid_card_be_ops = {
144 .hw_params = odroid_card_be_hw_params,
145 .trigger = odroid_card_be_trigger,
148 /* DAPM routes for backward compatibility with old DTS */
149 static const struct snd_soc_dapm_route odroid_dapm_routes[] = {
150 { "I2S Playback", NULL, "Mixer DAI TX" },
151 { "HiFi Playback", NULL, "Mixer DAI TX" },
154 SND_SOC_DAILINK_DEFS(primary,
155 DAILINK_COMP_ARRAY(COMP_EMPTY()),
156 DAILINK_COMP_ARRAY(COMP_DUMMY()),
157 DAILINK_COMP_ARRAY(COMP_PLATFORM("3830000.i2s")));
159 SND_SOC_DAILINK_DEFS(mixer,
160 DAILINK_COMP_ARRAY(COMP_DUMMY()),
161 DAILINK_COMP_ARRAY(COMP_EMPTY()),
162 DAILINK_COMP_ARRAY(COMP_DUMMY()));
164 SND_SOC_DAILINK_DEFS(secondary,
165 DAILINK_COMP_ARRAY(COMP_EMPTY()),
166 DAILINK_COMP_ARRAY(COMP_DUMMY()),
167 DAILINK_COMP_ARRAY(COMP_PLATFORM("3830000.i2s-sec")));
169 static struct snd_soc_dai_link odroid_card_dais[] = {
171 /* Primary FE <-> BE link */
172 .ops = &odroid_card_fe_ops,
174 .stream_name = "Primary",
177 SND_SOC_DAILINK_REG(primary),
179 /* BE <-> CODECs link */
181 .ops = &odroid_card_be_ops,
184 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
185 SND_SOC_DAIFMT_CBS_CFS,
186 SND_SOC_DAILINK_REG(mixer),
188 /* Secondary FE <-> BE link */
190 .ops = &odroid_card_fe_ops,
192 .stream_name = "Secondary",
195 SND_SOC_DAILINK_REG(secondary),
199 static int odroid_audio_probe(struct platform_device *pdev)
201 struct device *dev = &pdev->dev;
202 struct device_node *cpu_dai = NULL;
203 struct device_node *cpu, *codec;
204 struct odroid_priv *priv;
205 struct snd_soc_card *card;
206 struct snd_soc_dai_link *link, *codec_link;
207 int num_pcms, ret, i;
208 struct of_phandle_args args = {};
210 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
217 card->owner = THIS_MODULE;
218 card->fully_routed = true;
220 spin_lock_init(&priv->lock);
221 snd_soc_card_set_drvdata(card, priv);
223 ret = snd_soc_of_parse_card_name(card, "model");
227 if (of_property_read_bool(dev->of_node, "samsung,audio-widgets")) {
228 ret = snd_soc_of_parse_audio_simple_widgets(card,
229 "samsung,audio-widgets");
234 if (of_property_read_bool(dev->of_node, "samsung,audio-routing")) {
235 ret = snd_soc_of_parse_audio_routing(card,
236 "samsung,audio-routing");
241 card->dai_link = odroid_card_dais;
242 card->num_links = ARRAY_SIZE(odroid_card_dais);
244 cpu = of_get_child_by_name(dev->of_node, "cpu");
245 codec = of_get_child_by_name(dev->of_node, "codec");
246 link = card->dai_link;
247 codec_link = &card->dai_link[1];
250 * For backwards compatibility create the secondary CPU DAI link only
251 * if there are 2 CPU DAI entries in the cpu sound-dai property in DT.
252 * Also add required DAPM routes not available in old DTS.
254 num_pcms = of_count_phandle_with_args(cpu, "sound-dai",
257 card->dapm_routes = odroid_dapm_routes;
258 card->num_dapm_routes = ARRAY_SIZE(odroid_dapm_routes);
262 for (i = 0; i < num_pcms; i++, link += 2) {
263 ret = of_parse_phandle_with_args(cpu, "sound-dai",
264 "#sound-dai-cells", i, &args);
269 dev_err(dev, "sound-dai property parse error: %d\n", ret);
274 ret = snd_soc_get_dai_name(&args, &link->cpus->dai_name);
275 of_node_put(args.np);
281 cpu_dai = of_parse_phandle(cpu, "sound-dai", 0);
290 ret = snd_soc_of_get_dai_link_codecs(dev, codec, codec_link);
292 goto err_put_cpu_dai;
294 /* Set capture capability only for boards with the MAX98090 CODEC */
295 if (codec_link->num_codecs > 1) {
296 card->dai_link[0].dpcm_capture = 1;
297 card->dai_link[1].dpcm_capture = 1;
300 priv->sclk_i2s = of_clk_get_by_name(cpu_dai, "i2s_opclk1");
301 if (IS_ERR(priv->sclk_i2s)) {
302 ret = PTR_ERR(priv->sclk_i2s);
303 goto err_put_cpu_dai;
306 priv->clk_i2s_bus = of_clk_get_by_name(cpu_dai, "iis");
307 if (IS_ERR(priv->clk_i2s_bus)) {
308 ret = PTR_ERR(priv->clk_i2s_bus);
312 ret = devm_snd_soc_register_card(dev, card);
314 if (ret != -EPROBE_DEFER)
315 dev_err(dev, "snd_soc_register_card() failed: %d\n",
317 goto err_put_clk_i2s;
320 of_node_put(cpu_dai);
325 clk_put(priv->clk_i2s_bus);
327 clk_put(priv->sclk_i2s);
329 of_node_put(cpu_dai);
330 snd_soc_of_put_dai_link_codecs(codec_link);
336 static int odroid_audio_remove(struct platform_device *pdev)
338 struct odroid_priv *priv = platform_get_drvdata(pdev);
340 snd_soc_of_put_dai_link_codecs(&priv->card.dai_link[1]);
341 clk_put(priv->sclk_i2s);
342 clk_put(priv->clk_i2s_bus);
347 static const struct of_device_id odroid_audio_of_match[] = {
348 { .compatible = "hardkernel,odroid-xu3-audio" },
349 { .compatible = "hardkernel,odroid-xu4-audio" },
350 { .compatible = "samsung,odroid-xu3-audio" },
351 { .compatible = "samsung,odroid-xu4-audio" },
354 MODULE_DEVICE_TABLE(of, odroid_audio_of_match);
356 static struct platform_driver odroid_audio_driver = {
358 .name = "odroid-audio",
359 .of_match_table = odroid_audio_of_match,
360 .pm = &snd_soc_pm_ops,
362 .probe = odroid_audio_probe,
363 .remove = odroid_audio_remove,
365 module_platform_driver(odroid_audio_driver);
367 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
368 MODULE_DESCRIPTION("Odroid XU3/XU4 audio support");
369 MODULE_LICENSE("GPL v2");