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13#include <linux/module.h>
14#include <linux/of_platform.h>
15#include <linux/clk.h>
16#include <sound/soc.h>
17#include <sound/soc-dapm.h>
18#include <linux/pm_runtime.h>
19#include "fsl_sai.h"
20#include "fsl_audmix.h"
21
22struct imx_audmix {
23 struct platform_device *pdev;
24 struct snd_soc_card card;
25 struct platform_device *audmix_pdev;
26 struct platform_device *out_pdev;
27 struct clk *cpu_mclk;
28 int num_dai;
29 struct snd_soc_dai_link *dai;
30 int num_dai_conf;
31 struct snd_soc_codec_conf *dai_conf;
32 int num_dapm_routes;
33 struct snd_soc_dapm_route *dapm_routes;
34};
35
36static const u32 imx_audmix_rates[] = {
37 8000, 12000, 16000, 24000, 32000, 48000, 64000, 96000,
38};
39
40static const struct snd_pcm_hw_constraint_list imx_audmix_rate_constraints = {
41 .count = ARRAY_SIZE(imx_audmix_rates),
42 .list = imx_audmix_rates,
43};
44
45static int imx_audmix_fe_startup(struct snd_pcm_substream *substream)
46{
47 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
48 struct imx_audmix *priv = snd_soc_card_get_drvdata(rtd->card);
49 struct snd_pcm_runtime *runtime = substream->runtime;
50 struct device *dev = rtd->card->dev;
51 unsigned long clk_rate = clk_get_rate(priv->cpu_mclk);
52 int ret;
53
54 if (clk_rate % 24576000 == 0) {
55 ret = snd_pcm_hw_constraint_list(runtime, 0,
56 SNDRV_PCM_HW_PARAM_RATE,
57 &imx_audmix_rate_constraints);
58 if (ret < 0)
59 return ret;
60 } else {
61 dev_warn(dev, "mclk may be not supported %lu\n", clk_rate);
62 }
63
64 ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
65 1, 8);
66 if (ret < 0)
67 return ret;
68
69 return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT,
70 FSL_AUDMIX_FORMATS);
71}
72
73static int imx_audmix_fe_hw_params(struct snd_pcm_substream *substream,
74 struct snd_pcm_hw_params *params)
75{
76 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
77 struct device *dev = rtd->card->dev;
78 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
79 unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF;
80 u32 channels = params_channels(params);
81 int ret, dir;
82
83
84 fmt |= tx ? SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBM_CFM;
85 dir = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN;
86
87
88 ret = snd_soc_dai_set_fmt(asoc_rtd_to_cpu(rtd, 0), fmt);
89 if (ret) {
90 dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
91 return ret;
92 }
93
94 ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), FSL_SAI_CLK_MAST1, 0, dir);
95 if (ret) {
96 dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
97 return ret;
98 }
99
100
101
102
103
104 ret = snd_soc_dai_set_tdm_slot(asoc_rtd_to_cpu(rtd, 0), BIT(channels) - 1,
105 BIT(channels) - 1, 8, 32);
106 if (ret)
107 dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
108
109 return ret;
110}
111
112static int imx_audmix_be_hw_params(struct snd_pcm_substream *substream,
113 struct snd_pcm_hw_params *params)
114{
115 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
116 struct device *dev = rtd->card->dev;
117 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
118 unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF;
119 int ret;
120
121 if (!tx)
122 return 0;
123
124
125 fmt |= SND_SOC_DAIFMT_CBM_CFM;
126
127
128 ret = snd_soc_dai_set_fmt(asoc_rtd_to_cpu(rtd, 0), fmt);
129 if (ret)
130 dev_err(dev, "failed to set AUDMIX DAI fmt: %d\n", ret);
131
132 return ret;
133}
134
135static struct snd_soc_ops imx_audmix_fe_ops = {
136 .startup = imx_audmix_fe_startup,
137 .hw_params = imx_audmix_fe_hw_params,
138};
139
140static struct snd_soc_ops imx_audmix_be_ops = {
141 .hw_params = imx_audmix_be_hw_params,
142};
143
144static int imx_audmix_probe(struct platform_device *pdev)
145{
146 struct device_node *np = pdev->dev.of_node;
147 struct device_node *audmix_np = NULL, *out_cpu_np = NULL;
148 struct platform_device *audmix_pdev = NULL;
149 struct platform_device *cpu_pdev;
150 struct of_phandle_args args;
151 struct imx_audmix *priv;
152 int i, num_dai, ret;
153 const char *fe_name_pref = "HiFi-AUDMIX-FE-";
154 char *be_name, *be_pb, *be_cp, *dai_name, *capture_dai_name;
155
156 if (pdev->dev.parent) {
157 audmix_np = pdev->dev.parent->of_node;
158 } else {
159 dev_err(&pdev->dev, "Missing parent device.\n");
160 return -EINVAL;
161 }
162
163 if (!audmix_np) {
164 dev_err(&pdev->dev, "Missing DT node for parent device.\n");
165 return -EINVAL;
166 }
167
168 audmix_pdev = of_find_device_by_node(audmix_np);
169 if (!audmix_pdev) {
170 dev_err(&pdev->dev, "Missing AUDMIX platform device for %s\n",
171 np->full_name);
172 return -EINVAL;
173 }
174 put_device(&audmix_pdev->dev);
175
176 num_dai = of_count_phandle_with_args(audmix_np, "dais", NULL);
177 if (num_dai != FSL_AUDMIX_MAX_DAIS) {
178 dev_err(&pdev->dev, "Need 2 dais to be provided for %s\n",
179 audmix_np->full_name);
180 return -EINVAL;
181 }
182
183 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
184 if (!priv)
185 return -ENOMEM;
186
187 priv->num_dai = 2 * num_dai;
188 priv->dai = devm_kcalloc(&pdev->dev, priv->num_dai,
189 sizeof(struct snd_soc_dai_link), GFP_KERNEL);
190 if (!priv->dai)
191 return -ENOMEM;
192
193 priv->num_dai_conf = num_dai;
194 priv->dai_conf = devm_kcalloc(&pdev->dev, priv->num_dai_conf,
195 sizeof(struct snd_soc_codec_conf),
196 GFP_KERNEL);
197 if (!priv->dai_conf)
198 return -ENOMEM;
199
200 priv->num_dapm_routes = 3 * num_dai;
201 priv->dapm_routes = devm_kcalloc(&pdev->dev, priv->num_dapm_routes,
202 sizeof(struct snd_soc_dapm_route),
203 GFP_KERNEL);
204 if (!priv->dapm_routes)
205 return -ENOMEM;
206
207 for (i = 0; i < num_dai; i++) {
208 struct snd_soc_dai_link_component *dlc;
209
210
211 dlc = devm_kcalloc(&pdev->dev, 6, sizeof(*dlc), GFP_KERNEL);
212 if (!dlc)
213 return -ENOMEM;
214
215 ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i,
216 &args);
217 if (ret < 0) {
218 dev_err(&pdev->dev, "of_parse_phandle_with_args failed\n");
219 return ret;
220 }
221
222 cpu_pdev = of_find_device_by_node(args.np);
223 if (!cpu_pdev) {
224 dev_err(&pdev->dev, "failed to find SAI platform device\n");
225 return -EINVAL;
226 }
227 put_device(&cpu_pdev->dev);
228
229 dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s",
230 fe_name_pref, args.np->full_name + 1);
231
232 dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name);
233
234 if (i == 0) {
235 out_cpu_np = args.np;
236 capture_dai_name =
237 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
238 dai_name, "CPU-Capture");
239 }
240
241 priv->dai[i].cpus = &dlc[0];
242 priv->dai[i].codecs = &dlc[1];
243 priv->dai[i].platforms = &dlc[2];
244
245 priv->dai[i].num_cpus = 1;
246 priv->dai[i].num_codecs = 1;
247 priv->dai[i].num_platforms = 1;
248
249 priv->dai[i].name = dai_name;
250 priv->dai[i].stream_name = "HiFi-AUDMIX-FE";
251 priv->dai[i].codecs->dai_name = "snd-soc-dummy-dai";
252 priv->dai[i].codecs->name = "snd-soc-dummy";
253 priv->dai[i].cpus->of_node = args.np;
254 priv->dai[i].cpus->dai_name = dev_name(&cpu_pdev->dev);
255 priv->dai[i].platforms->of_node = args.np;
256 priv->dai[i].dynamic = 1;
257 priv->dai[i].dpcm_playback = 1;
258 priv->dai[i].dpcm_capture = (i == 0 ? 1 : 0);
259 priv->dai[i].ignore_pmdown_time = 1;
260 priv->dai[i].ops = &imx_audmix_fe_ops;
261
262
263 be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
264 "audmix-%d", i);
265 be_pb = devm_kasprintf(&pdev->dev, GFP_KERNEL,
266 "AUDMIX-Playback-%d", i);
267 be_cp = devm_kasprintf(&pdev->dev, GFP_KERNEL,
268 "AUDMIX-Capture-%d", i);
269
270 priv->dai[num_dai + i].cpus = &dlc[3];
271 priv->dai[num_dai + i].codecs = &dlc[4];
272 priv->dai[num_dai + i].platforms = &dlc[5];
273
274 priv->dai[num_dai + i].num_cpus = 1;
275 priv->dai[num_dai + i].num_codecs = 1;
276 priv->dai[num_dai + i].num_platforms = 1;
277
278 priv->dai[num_dai + i].name = be_name;
279 priv->dai[num_dai + i].codecs->dai_name = "snd-soc-dummy-dai";
280 priv->dai[num_dai + i].codecs->name = "snd-soc-dummy";
281 priv->dai[num_dai + i].cpus->of_node = audmix_np;
282 priv->dai[num_dai + i].cpus->dai_name = be_name;
283 priv->dai[num_dai + i].platforms->name = "snd-soc-dummy";
284 priv->dai[num_dai + i].no_pcm = 1;
285 priv->dai[num_dai + i].dpcm_playback = 1;
286 priv->dai[num_dai + i].dpcm_capture = 1;
287 priv->dai[num_dai + i].ignore_pmdown_time = 1;
288 priv->dai[num_dai + i].ops = &imx_audmix_be_ops;
289
290 priv->dai_conf[i].dlc.of_node = args.np;
291 priv->dai_conf[i].name_prefix = dai_name;
292
293 priv->dapm_routes[i].source =
294 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
295 dai_name, "CPU-Playback");
296 priv->dapm_routes[i].sink = be_pb;
297 priv->dapm_routes[num_dai + i].source = be_pb;
298 priv->dapm_routes[num_dai + i].sink = be_cp;
299 priv->dapm_routes[2 * num_dai + i].source = be_cp;
300 priv->dapm_routes[2 * num_dai + i].sink = capture_dai_name;
301 }
302
303 cpu_pdev = of_find_device_by_node(out_cpu_np);
304 if (!cpu_pdev) {
305 dev_err(&pdev->dev, "failed to find SAI platform device\n");
306 return -EINVAL;
307 }
308 put_device(&cpu_pdev->dev);
309
310 priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1");
311 if (IS_ERR(priv->cpu_mclk)) {
312 ret = PTR_ERR(priv->cpu_mclk);
313 dev_err(&cpu_pdev->dev, "failed to get DAI mclk1: %d\n", ret);
314 return -EINVAL;
315 }
316
317 priv->audmix_pdev = audmix_pdev;
318 priv->out_pdev = cpu_pdev;
319
320 priv->card.dai_link = priv->dai;
321 priv->card.num_links = priv->num_dai;
322 priv->card.codec_conf = priv->dai_conf;
323 priv->card.num_configs = priv->num_dai_conf;
324 priv->card.dapm_routes = priv->dapm_routes;
325 priv->card.num_dapm_routes = priv->num_dapm_routes;
326 priv->card.dev = &pdev->dev;
327 priv->card.owner = THIS_MODULE;
328 priv->card.name = "imx-audmix";
329
330 platform_set_drvdata(pdev, &priv->card);
331 snd_soc_card_set_drvdata(&priv->card, priv);
332
333 ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
334 if (ret) {
335 dev_err(&pdev->dev, "snd_soc_register_card failed\n");
336 return ret;
337 }
338
339 return ret;
340}
341
342static struct platform_driver imx_audmix_driver = {
343 .probe = imx_audmix_probe,
344 .driver = {
345 .name = "imx-audmix",
346 .pm = &snd_soc_pm_ops,
347 },
348};
349module_platform_driver(imx_audmix_driver);
350
351MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver");
352MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");
353MODULE_ALIAS("platform:imx-audmix");
354MODULE_LICENSE("GPL v2");
355
