1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright 2017 NXP
4 *
5 * The code contained herein is licensed under the GNU General Public
6 * License. You may obtain a copy of the GNU General Public License
7 * Version 2 or later at the following locations:
8 *
9 * https://www.opensource.org/licenses/gpl-license.html
10 * https://www.gnu.org/copyleft/gpl.html
11 */
12
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 "fsl_sai.h"
19 #include "fsl_audmix.h"
20
21 struct imx_audmix {
22 struct platform_device *pdev;
23 struct snd_soc_card card;
24 struct platform_device *audmix_pdev;
25 struct platform_device *out_pdev;
26 struct clk *cpu_mclk;
27 int num_dai;
28 struct snd_soc_dai_link *dai;
29 int num_dai_conf;
30 struct snd_soc_codec_conf *dai_conf;
31 int num_dapm_routes;
32 struct snd_soc_dapm_route *dapm_routes;
33 };
34
35 static const u32 imx_audmix_rates[] = {
36 8000, 12000, 16000, 24000, 32000, 48000, 64000, 96000,
37 };
38
39 static const struct snd_pcm_hw_constraint_list imx_audmix_rate_constraints = {
40 .count = ARRAY_SIZE(imx_audmix_rates),
41 .list = imx_audmix_rates,
42 };
43
imx_audmix_fe_startup(struct snd_pcm_substream * substream)44 static int imx_audmix_fe_startup(struct snd_pcm_substream *substream)
45 {
46 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
47 struct imx_audmix *priv = snd_soc_card_get_drvdata(rtd->card);
48 struct snd_pcm_runtime *runtime = substream->runtime;
49 struct device *dev = rtd->card->dev;
50 unsigned long clk_rate = clk_get_rate(priv->cpu_mclk);
51 int ret;
52
53 if (clk_rate % 24576000 == 0) {
54 ret = snd_pcm_hw_constraint_list(runtime, 0,
55 SNDRV_PCM_HW_PARAM_RATE,
56 &imx_audmix_rate_constraints);
57 if (ret < 0)
58 return ret;
59 } else {
60 dev_warn(dev, "mclk may be not supported %lu\n", clk_rate);
61 }
62
63 ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
64 1, 8);
65 if (ret < 0)
66 return ret;
67
68 return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT,
69 FSL_AUDMIX_FORMATS);
70 }
71
imx_audmix_fe_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)72 static int imx_audmix_fe_hw_params(struct snd_pcm_substream *substream,
73 struct snd_pcm_hw_params *params)
74 {
75 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
76 struct device *dev = rtd->card->dev;
77 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
78 unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF;
79 u32 channels = params_channels(params);
80 int ret, dir;
81
82 /* For playback the AUDMIX is consumer, and for record is provider */
83 fmt |= tx ? SND_SOC_DAIFMT_BP_FP : SND_SOC_DAIFMT_BC_FC;
84 dir = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN;
85
86 /* set DAI configuration */
87 ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0), fmt);
88 if (ret) {
89 dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
90 return ret;
91 }
92
93 ret = snd_soc_dai_set_sysclk(snd_soc_rtd_to_cpu(rtd, 0), FSL_SAI_CLK_MAST1, 0, dir);
94 if (ret) {
95 dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
96 return ret;
97 }
98
99 /*
100 * Per datasheet, AUDMIX expects 8 slots and 32 bits
101 * for every slot in TDM mode.
102 */
103 ret = snd_soc_dai_set_tdm_slot(snd_soc_rtd_to_cpu(rtd, 0), BIT(channels) - 1,
104 BIT(channels) - 1, 8, 32);
105 if (ret)
106 dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
107
108 return ret;
109 }
110
imx_audmix_be_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)111 static int imx_audmix_be_hw_params(struct snd_pcm_substream *substream,
112 struct snd_pcm_hw_params *params)
113 {
114 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
115 struct device *dev = rtd->card->dev;
116 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
117 unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF;
118 int ret;
119
120 if (!tx)
121 return 0;
122
123 /* For playback the AUDMIX is consumer */
124 fmt |= SND_SOC_DAIFMT_BC_FC;
125
126 /* set AUDMIX DAI configuration */
127 ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0), fmt);
128 if (ret)
129 dev_err(dev, "failed to set AUDMIX DAI fmt: %d\n", ret);
130
131 return ret;
132 }
133
134 static const struct snd_soc_ops imx_audmix_fe_ops = {
135 .startup = imx_audmix_fe_startup,
136 .hw_params = imx_audmix_fe_hw_params,
137 };
138
139 static const struct snd_soc_ops imx_audmix_be_ops = {
140 .hw_params = imx_audmix_be_hw_params,
141 };
142
143 static const char *name[][3] = {
144 {"HiFi-AUDMIX-FE-0", "HiFi-AUDMIX-FE-1", "HiFi-AUDMIX-FE-2"},
145 {"sai-tx", "sai-tx", "sai-rx"},
146 {"AUDMIX-Playback-0", "AUDMIX-Playback-1", "CPU-Capture"},
147 {"CPU-Playback", "CPU-Playback", "AUDMIX-Capture-0"},
148 };
149
imx_audmix_probe(struct platform_device * pdev)150 static int imx_audmix_probe(struct platform_device *pdev)
151 {
152 struct device_node *np = pdev->dev.of_node;
153 struct device_node *audmix_np = NULL, *out_cpu_np = NULL;
154 struct platform_device *audmix_pdev = NULL;
155 struct platform_device *cpu_pdev;
156 struct of_phandle_args args;
157 struct imx_audmix *priv;
158 int i, num_dai, ret;
159 const char *fe_name_pref = "HiFi-AUDMIX-FE-";
160 char *be_name, *dai_name;
161
162 if (pdev->dev.parent) {
163 audmix_np = pdev->dev.parent->of_node;
164 } else {
165 dev_err(&pdev->dev, "Missing parent device.\n");
166 return -EINVAL;
167 }
168
169 if (!audmix_np) {
170 dev_err(&pdev->dev, "Missing DT node for parent device.\n");
171 return -EINVAL;
172 }
173
174 audmix_pdev = of_find_device_by_node(audmix_np);
175 if (!audmix_pdev) {
176 dev_err(&pdev->dev, "Missing AUDMIX platform device for %s\n",
177 np->full_name);
178 return -EINVAL;
179 }
180 put_device(&audmix_pdev->dev);
181
182 num_dai = of_count_phandle_with_args(audmix_np, "dais", NULL);
183 if (num_dai != FSL_AUDMIX_MAX_DAIS) {
184 dev_err(&pdev->dev, "Need 2 dais to be provided for %s\n",
185 audmix_np->full_name);
186 return -EINVAL;
187 }
188
189 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
190 if (!priv)
191 return -ENOMEM;
192
193 num_dai += 1;
194 priv->num_dai = 2 * num_dai;
195 priv->dai = devm_kcalloc(&pdev->dev, priv->num_dai,
196 sizeof(struct snd_soc_dai_link), GFP_KERNEL);
197 if (!priv->dai)
198 return -ENOMEM;
199
200 priv->num_dai_conf = num_dai;
201 priv->dai_conf = devm_kcalloc(&pdev->dev, priv->num_dai_conf,
202 sizeof(struct snd_soc_codec_conf),
203 GFP_KERNEL);
204 if (!priv->dai_conf)
205 return -ENOMEM;
206
207 priv->num_dapm_routes = num_dai;
208 priv->dapm_routes = devm_kcalloc(&pdev->dev, priv->num_dapm_routes,
209 sizeof(struct snd_soc_dapm_route),
210 GFP_KERNEL);
211 if (!priv->dapm_routes)
212 return -ENOMEM;
213
214 for (i = 0; i < num_dai; i++) {
215 struct snd_soc_dai_link_component *dlc;
216
217 /* for CPU x 2 */
218 dlc = devm_kcalloc(&pdev->dev, 2, sizeof(*dlc), GFP_KERNEL);
219 if (!dlc)
220 return -ENOMEM;
221
222 if (i == num_dai - 1)
223 ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, 0,
224 &args);
225 else
226 ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i,
227 &args);
228 if (ret < 0) {
229 dev_err(&pdev->dev, "of_parse_phandle_with_args failed\n");
230 return ret;
231 }
232
233 cpu_pdev = of_find_device_by_node(args.np);
234 if (!cpu_pdev) {
235 dev_err(&pdev->dev, "failed to find SAI platform device\n");
236 return -EINVAL;
237 }
238 put_device(&cpu_pdev->dev);
239
240 dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s",
241 fe_name_pref, args.np->full_name);
242 if (!dai_name)
243 return -ENOMEM;
244
245 dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name);
246
247 if (i == num_dai - 1)
248 out_cpu_np = args.np;
249
250 /*
251 * CPU == Platform
252 * platform is using soc-generic-dmaengine-pcm
253 */
254 priv->dai[i].cpus =
255 priv->dai[i].platforms = &dlc[0];
256 priv->dai[i].codecs = &snd_soc_dummy_dlc;
257
258 priv->dai[i].num_cpus = 1;
259 priv->dai[i].num_codecs = 1;
260 priv->dai[i].num_platforms = 1;
261 priv->dai[i].name = name[0][i];
262 priv->dai[i].stream_name = "HiFi-AUDMIX-FE";
263 priv->dai[i].cpus->of_node = args.np;
264 priv->dai[i].cpus->dai_name = name[1][i];
265
266 priv->dai[i].dynamic = 1;
267 priv->dai[i].dpcm_playback = 1;
268 if (i == num_dai - 1) {
269 priv->dai[i].dpcm_capture = 1;
270 priv->dai[i].dpcm_playback = 0;
271 }
272 priv->dai[i].ignore_pmdown_time = 1;
273 priv->dai[i].ops = &imx_audmix_fe_ops;
274
275 /* Add AUDMIX Backend */
276 be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
277 "audmix-%d", i);
278 priv->dai[num_dai + i].cpus = &dlc[1];
279 priv->dai[num_dai + i].codecs = &snd_soc_dummy_dlc;
280
281 priv->dai[num_dai + i].num_cpus = 1;
282 priv->dai[num_dai + i].num_codecs = 1;
283
284 priv->dai[num_dai + i].name = be_name;
285 priv->dai[num_dai + i].cpus->of_node = audmix_np;
286 priv->dai[num_dai + i].cpus->dai_name = be_name;
287 priv->dai[num_dai + i].no_pcm = 1;
288 priv->dai[num_dai + i].dpcm_playback = 1;
289 if (i == num_dai - 1) {
290 priv->dai[num_dai + i].dpcm_capture = 1;
291 priv->dai[num_dai + i].dpcm_playback = 0;
292 }
293 priv->dai[num_dai + i].ignore_pmdown_time = 1;
294 priv->dai[num_dai + i].ops = &imx_audmix_be_ops;
295
296 priv->dai_conf[i].dlc.of_node = args.np;
297 priv->dai_conf[i].name_prefix = dai_name;
298
299 if (i == num_dai - 1) {
300 priv->dapm_routes[i].sink =
301 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
302 dai_name, name[2][i]);
303 if (!priv->dapm_routes[i].sink)
304 return -ENOMEM;
305
306 priv->dapm_routes[i].source = name[3][i];
307 } else {
308 priv->dapm_routes[i].source =
309 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
310 dai_name, name[3][i]);
311 if (!priv->dapm_routes[i].source)
312 return -ENOMEM;
313
314 priv->dapm_routes[i].sink = name[2][i];
315 }
316 }
317
318 cpu_pdev = of_find_device_by_node(out_cpu_np);
319 if (!cpu_pdev) {
320 dev_err(&pdev->dev, "failed to find SAI platform device\n");
321 return -EINVAL;
322 }
323 put_device(&cpu_pdev->dev);
324
325 priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1");
326 if (IS_ERR(priv->cpu_mclk)) {
327 ret = PTR_ERR(priv->cpu_mclk);
328 dev_err(&cpu_pdev->dev, "failed to get DAI mclk1: %d\n", ret);
329 return ret;
330 }
331
332 priv->audmix_pdev = audmix_pdev;
333 priv->out_pdev = cpu_pdev;
334
335 priv->card.dai_link = priv->dai;
336 priv->card.num_links = priv->num_dai;
337 priv->card.codec_conf = priv->dai_conf;
338 priv->card.num_configs = priv->num_dai_conf;
339 priv->card.dapm_routes = priv->dapm_routes;
340 priv->card.num_dapm_routes = priv->num_dapm_routes;
341 priv->card.dev = &pdev->dev;
342 priv->card.owner = THIS_MODULE;
343 priv->card.name = "imx-audmix";
344
345 platform_set_drvdata(pdev, &priv->card);
346 snd_soc_card_set_drvdata(&priv->card, priv);
347
348 ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
349 if (ret) {
350 dev_err(&pdev->dev, "snd_soc_register_card failed\n");
351 return ret;
352 }
353
354 return ret;
355 }
356
357 static struct platform_driver imx_audmix_driver = {
358 .probe = imx_audmix_probe,
359 .driver = {
360 .name = "imx-audmix",
361 .pm = &snd_soc_pm_ops,
362 },
363 };
364 module_platform_driver(imx_audmix_driver);
365
366 MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver");
367 MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");
368 MODULE_ALIAS("platform:imx-audmix");
369 MODULE_LICENSE("GPL v2");
370