1
2
3
4
5#include <linux/clk.h>
6#include <linux/clk-provider.h>
7#include <linux/of.h>
8#include <linux/of_device.h>
9#include <linux/module.h>
10#include <sound/soc.h>
11#include <sound/pcm_params.h>
12#include "i2s.h"
13#include "i2s-regs.h"
14
15struct odroid_priv {
16 struct snd_soc_card card;
17 struct clk *clk_i2s_bus;
18 struct clk *sclk_i2s;
19
20
21 spinlock_t lock;
22 unsigned int be_sample_rate;
23 bool be_active;
24};
25
26static int odroid_card_fe_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
32 return 0;
33}
34
35static int odroid_card_fe_hw_params(struct snd_pcm_substream *substream,
36 struct snd_pcm_hw_params *params)
37{
38 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
39 struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
40 unsigned long flags;
41 int ret = 0;
42
43 spin_lock_irqsave(&priv->lock, flags);
44 if (priv->be_active && priv->be_sample_rate != params_rate(params))
45 ret = -EINVAL;
46 spin_unlock_irqrestore(&priv->lock, flags);
47
48 return ret;
49}
50
51static const struct snd_soc_ops odroid_card_fe_ops = {
52 .startup = odroid_card_fe_startup,
53 .hw_params = odroid_card_fe_hw_params,
54};
55
56static int odroid_card_be_hw_params(struct snd_pcm_substream *substream,
57 struct snd_pcm_hw_params *params)
58{
59 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
60 struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
61 unsigned int pll_freq, rclk_freq, rfs;
62 unsigned long flags;
63 int ret;
64
65 switch (params_rate(params)) {
66 case 64000:
67 pll_freq = 196608001U;
68 rfs = 384;
69 break;
70 case 44100:
71 case 88200:
72 pll_freq = 180633609U;
73 rfs = 512;
74 break;
75 case 32000:
76 case 48000:
77 case 96000:
78 pll_freq = 196608001U;
79 rfs = 512;
80 break;
81 default:
82 return -EINVAL;
83 }
84
85 ret = clk_set_rate(priv->clk_i2s_bus, pll_freq / 2 + 1);
86 if (ret < 0)
87 return ret;
88
89
90
91
92
93
94 rclk_freq = params_rate(params) * rfs + 2;
95
96 ret = clk_set_rate(priv->sclk_i2s, rclk_freq);
97 if (ret < 0)
98 return ret;
99
100 if (rtd->num_codecs > 1) {
101 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 1);
102
103 ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk_freq,
104 SND_SOC_CLOCK_IN);
105 if (ret < 0)
106 return ret;
107 }
108
109 spin_lock_irqsave(&priv->lock, flags);
110 priv->be_sample_rate = params_rate(params);
111 spin_unlock_irqrestore(&priv->lock, flags);
112
113 return 0;
114}
115
116static int odroid_card_be_trigger(struct snd_pcm_substream *substream, int cmd)
117{
118 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
119 struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
120 unsigned long flags;
121
122 spin_lock_irqsave(&priv->lock, flags);
123
124 switch (cmd) {
125 case SNDRV_PCM_TRIGGER_START:
126 case SNDRV_PCM_TRIGGER_RESUME:
127 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
128 priv->be_active = true;
129 break;
130
131 case SNDRV_PCM_TRIGGER_STOP:
132 case SNDRV_PCM_TRIGGER_SUSPEND:
133 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
134 priv->be_active = false;
135 break;
136 }
137
138 spin_unlock_irqrestore(&priv->lock, flags);
139
140 return 0;
141}
142
143static const struct snd_soc_ops odroid_card_be_ops = {
144 .hw_params = odroid_card_be_hw_params,
145 .trigger = odroid_card_be_trigger,
146};
147
148
149static const struct snd_soc_dapm_route odroid_dapm_routes[] = {
150 { "I2S Playback", NULL, "Mixer DAI TX" },
151 { "HiFi Playback", NULL, "Mixer DAI TX" },
152};
153
154SND_SOC_DAILINK_DEFS(primary,
155 DAILINK_COMP_ARRAY(COMP_EMPTY()),
156 DAILINK_COMP_ARRAY(COMP_DUMMY()),
157 DAILINK_COMP_ARRAY(COMP_PLATFORM("3830000.i2s")));
158
159SND_SOC_DAILINK_DEFS(mixer,
160 DAILINK_COMP_ARRAY(COMP_DUMMY()),
161 DAILINK_COMP_ARRAY(COMP_EMPTY()),
162 DAILINK_COMP_ARRAY(COMP_DUMMY()));
163
164SND_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")));
168
169static struct snd_soc_dai_link odroid_card_dais[] = {
170 {
171
172 .ops = &odroid_card_fe_ops,
173 .name = "Primary",
174 .stream_name = "Primary",
175 .dynamic = 1,
176 .dpcm_playback = 1,
177 SND_SOC_DAILINK_REG(primary),
178 }, {
179
180 .name = "I2S Mixer",
181 .ops = &odroid_card_be_ops,
182 .no_pcm = 1,
183 .dpcm_playback = 1,
184 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
185 SND_SOC_DAIFMT_CBS_CFS,
186 SND_SOC_DAILINK_REG(mixer),
187 }, {
188
189 .playback_only = 1,
190 .ops = &odroid_card_fe_ops,
191 .name = "Secondary",
192 .stream_name = "Secondary",
193 .dynamic = 1,
194 .dpcm_playback = 1,
195 SND_SOC_DAILINK_REG(secondary),
196 }
197};
198
199static int odroid_audio_probe(struct platform_device *pdev)
200{
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 = {};
209
210 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
211 if (!priv)
212 return -ENOMEM;
213
214 card = &priv->card;
215 card->dev = dev;
216
217 card->owner = THIS_MODULE;
218 card->fully_routed = true;
219
220 spin_lock_init(&priv->lock);
221 snd_soc_card_set_drvdata(card, priv);
222
223 ret = snd_soc_of_parse_card_name(card, "model");
224 if (ret < 0)
225 return ret;
226
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");
230 if (ret < 0)
231 return ret;
232 }
233
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");
237 if (ret < 0)
238 return ret;
239 }
240
241 card->dai_link = odroid_card_dais;
242 card->num_links = ARRAY_SIZE(odroid_card_dais);
243
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];
248
249
250
251
252
253
254 num_pcms = of_count_phandle_with_args(cpu, "sound-dai",
255 "#sound-dai-cells");
256 if (num_pcms == 1) {
257 card->dapm_routes = odroid_dapm_routes;
258 card->num_dapm_routes = ARRAY_SIZE(odroid_dapm_routes);
259 card->num_links--;
260 }
261
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);
265 if (ret < 0)
266 break;
267
268 if (!args.np) {
269 dev_err(dev, "sound-dai property parse error: %d\n", ret);
270 ret = -EINVAL;
271 break;
272 }
273
274 ret = snd_soc_get_dai_name(&args, &link->cpus->dai_name);
275 of_node_put(args.np);
276
277 if (ret < 0)
278 break;
279 }
280 if (ret == 0) {
281 cpu_dai = of_parse_phandle(cpu, "sound-dai", 0);
282 if (!cpu_dai)
283 ret = -EINVAL;
284 }
285
286 of_node_put(cpu);
287 if (ret < 0)
288 goto err_put_node;
289
290 ret = snd_soc_of_get_dai_link_codecs(dev, codec, codec_link);
291 if (ret < 0)
292 goto err_put_cpu_dai;
293
294
295 if (codec_link->num_codecs > 1) {
296 card->dai_link[0].dpcm_capture = 1;
297 card->dai_link[1].dpcm_capture = 1;
298 }
299
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;
304 }
305
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);
309 goto err_put_sclk;
310 }
311
312 ret = devm_snd_soc_register_card(dev, card);
313 if (ret < 0) {
314 if (ret != -EPROBE_DEFER)
315 dev_err(dev, "snd_soc_register_card() failed: %d\n",
316 ret);
317 goto err_put_clk_i2s;
318 }
319
320 of_node_put(cpu_dai);
321 of_node_put(codec);
322 return 0;
323
324err_put_clk_i2s:
325 clk_put(priv->clk_i2s_bus);
326err_put_sclk:
327 clk_put(priv->sclk_i2s);
328err_put_cpu_dai:
329 of_node_put(cpu_dai);
330 snd_soc_of_put_dai_link_codecs(codec_link);
331err_put_node:
332 of_node_put(codec);
333 return ret;
334}
335
336static int odroid_audio_remove(struct platform_device *pdev)
337{
338 struct odroid_priv *priv = platform_get_drvdata(pdev);
339
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);
343
344 return 0;
345}
346
347static 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" },
352 { },
353};
354MODULE_DEVICE_TABLE(of, odroid_audio_of_match);
355
356static struct platform_driver odroid_audio_driver = {
357 .driver = {
358 .name = "odroid-audio",
359 .of_match_table = odroid_audio_of_match,
360 .pm = &snd_soc_pm_ops,
361 },
362 .probe = odroid_audio_probe,
363 .remove = odroid_audio_remove,
364};
365module_platform_driver(odroid_audio_driver);
366
367MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
368MODULE_DESCRIPTION("Odroid XU3/XU4 audio support");
369MODULE_LICENSE("GPL v2");
370
