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 = substream->private_data;
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 = substream->private_data;
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 = rtd->codec_dais[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 = substream->private_data;
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
154static struct snd_soc_dai_link odroid_card_dais[] = {
155 {
156
157 .codec_name = "snd-soc-dummy",
158 .codec_dai_name = "snd-soc-dummy-dai",
159 .ops = &odroid_card_fe_ops,
160 .name = "Primary",
161 .stream_name = "Primary",
162 .platform_name = "3830000.i2s",
163 .dynamic = 1,
164 .dpcm_playback = 1,
165 }, {
166
167 .name = "I2S Mixer",
168 .cpu_name = "snd-soc-dummy",
169 .cpu_dai_name = "snd-soc-dummy-dai",
170 .platform_name = "snd-soc-dummy",
171 .ops = &odroid_card_be_ops,
172 .no_pcm = 1,
173 .dpcm_playback = 1,
174 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
175 SND_SOC_DAIFMT_CBS_CFS,
176 }, {
177
178 .playback_only = 1,
179 .codec_name = "snd-soc-dummy",
180 .codec_dai_name = "snd-soc-dummy-dai",
181 .ops = &odroid_card_fe_ops,
182 .name = "Secondary",
183 .stream_name = "Secondary",
184 .platform_name = "3830000.i2s-sec",
185 .dynamic = 1,
186 .dpcm_playback = 1,
187 }
188};
189
190static int odroid_audio_probe(struct platform_device *pdev)
191{
192 struct device *dev = &pdev->dev;
193 struct device_node *cpu_dai = NULL;
194 struct device_node *cpu, *codec;
195 struct odroid_priv *priv;
196 struct snd_soc_card *card;
197 struct snd_soc_dai_link *link, *codec_link;
198 int num_pcms, ret, i;
199 struct of_phandle_args args = {};
200
201 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
202 if (!priv)
203 return -ENOMEM;
204
205 card = &priv->card;
206 card->dev = dev;
207
208 card->owner = THIS_MODULE;
209 card->fully_routed = true;
210
211 spin_lock_init(&priv->lock);
212 snd_soc_card_set_drvdata(card, priv);
213
214 ret = snd_soc_of_parse_card_name(card, "model");
215 if (ret < 0)
216 return ret;
217
218 if (of_property_read_bool(dev->of_node, "samsung,audio-widgets")) {
219 ret = snd_soc_of_parse_audio_simple_widgets(card,
220 "samsung,audio-widgets");
221 if (ret < 0)
222 return ret;
223 }
224
225 if (of_property_read_bool(dev->of_node, "samsung,audio-routing")) {
226 ret = snd_soc_of_parse_audio_routing(card,
227 "samsung,audio-routing");
228 if (ret < 0)
229 return ret;
230 }
231
232 card->dai_link = odroid_card_dais;
233 card->num_links = ARRAY_SIZE(odroid_card_dais);
234
235 cpu = of_get_child_by_name(dev->of_node, "cpu");
236 codec = of_get_child_by_name(dev->of_node, "codec");
237 link = card->dai_link;
238 codec_link = &card->dai_link[1];
239
240
241
242
243
244
245 num_pcms = of_count_phandle_with_args(cpu, "sound-dai",
246 "#sound-dai-cells");
247 if (num_pcms == 1) {
248 card->dapm_routes = odroid_dapm_routes;
249 card->num_dapm_routes = ARRAY_SIZE(odroid_dapm_routes);
250 card->num_links--;
251 }
252
253 for (i = 0; i < num_pcms; i++, link += 2) {
254 ret = of_parse_phandle_with_args(cpu, "sound-dai",
255 "#sound-dai-cells", i, &args);
256 if (ret < 0)
257 break;
258
259 if (!args.np) {
260 dev_err(dev, "sound-dai property parse error: %d\n", ret);
261 ret = -EINVAL;
262 break;
263 }
264
265 ret = snd_soc_get_dai_name(&args, &link->cpu_dai_name);
266 of_node_put(args.np);
267
268 if (ret < 0)
269 break;
270 }
271 if (ret == 0) {
272 cpu_dai = of_parse_phandle(cpu, "sound-dai", 0);
273 if (!cpu_dai)
274 ret = -EINVAL;
275 }
276
277 of_node_put(cpu);
278 of_node_put(codec);
279 if (ret < 0)
280 return ret;
281
282 ret = snd_soc_of_get_dai_link_codecs(dev, codec, codec_link);
283 if (ret < 0)
284 goto err_put_cpu_dai;
285
286
287 if (codec_link->num_codecs > 1) {
288 card->dai_link[0].dpcm_capture = 1;
289 card->dai_link[1].dpcm_capture = 1;
290 }
291
292 priv->sclk_i2s = of_clk_get_by_name(cpu_dai, "i2s_opclk1");
293 if (IS_ERR(priv->sclk_i2s)) {
294 ret = PTR_ERR(priv->sclk_i2s);
295 goto err_put_cpu_dai;
296 }
297
298 priv->clk_i2s_bus = of_clk_get_by_name(cpu_dai, "iis");
299 if (IS_ERR(priv->clk_i2s_bus)) {
300 ret = PTR_ERR(priv->clk_i2s_bus);
301 goto err_put_sclk;
302 }
303 of_node_put(cpu_dai);
304
305 ret = devm_snd_soc_register_card(dev, card);
306 if (ret < 0) {
307 dev_err(dev, "snd_soc_register_card() failed: %d\n", ret);
308 goto err_put_clk_i2s;
309 }
310
311 return 0;
312
313err_put_clk_i2s:
314 clk_put(priv->clk_i2s_bus);
315err_put_sclk:
316 clk_put(priv->sclk_i2s);
317err_put_cpu_dai:
318 of_node_put(cpu_dai);
319 snd_soc_of_put_dai_link_codecs(codec_link);
320 return ret;
321}
322
323static int odroid_audio_remove(struct platform_device *pdev)
324{
325 struct odroid_priv *priv = platform_get_drvdata(pdev);
326
327 snd_soc_of_put_dai_link_codecs(&priv->card.dai_link[1]);
328 clk_put(priv->sclk_i2s);
329 clk_put(priv->clk_i2s_bus);
330
331 return 0;
332}
333
334static const struct of_device_id odroid_audio_of_match[] = {
335 { .compatible = "hardkernel,odroid-xu3-audio" },
336 { .compatible = "hardkernel,odroid-xu4-audio" },
337 { .compatible = "samsung,odroid-xu3-audio" },
338 { .compatible = "samsung,odroid-xu4-audio" },
339 { },
340};
341MODULE_DEVICE_TABLE(of, odroid_audio_of_match);
342
343static struct platform_driver odroid_audio_driver = {
344 .driver = {
345 .name = "odroid-audio",
346 .of_match_table = odroid_audio_of_match,
347 .pm = &snd_soc_pm_ops,
348 },
349 .probe = odroid_audio_probe,
350 .remove = odroid_audio_remove,
351};
352module_platform_driver(odroid_audio_driver);
353
354MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
355MODULE_DESCRIPTION("Odroid XU3/XU4 audio support");
356MODULE_LICENSE("GPL v2");
357