xref: /openbmc/linux/sound/soc/fsl/imx-audmix.c (revision b19a5733)
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 = asoc_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 = asoc_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(asoc_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(asoc_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(asoc_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 = asoc_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(asoc_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 
imx_audmix_probe(struct platform_device * pdev)143 static int imx_audmix_probe(struct platform_device *pdev)
144 {
145 	struct device_node *np = pdev->dev.of_node;
146 	struct device_node *audmix_np = NULL, *out_cpu_np = NULL;
147 	struct platform_device *audmix_pdev = NULL;
148 	struct platform_device *cpu_pdev;
149 	struct of_phandle_args args;
150 	struct imx_audmix *priv;
151 	int i, num_dai, ret;
152 	const char *fe_name_pref = "HiFi-AUDMIX-FE-";
153 	char *be_name, *be_pb, *be_cp, *dai_name, *capture_dai_name;
154 
155 	if (pdev->dev.parent) {
156 		audmix_np = pdev->dev.parent->of_node;
157 	} else {
158 		dev_err(&pdev->dev, "Missing parent device.\n");
159 		return -EINVAL;
160 	}
161 
162 	if (!audmix_np) {
163 		dev_err(&pdev->dev, "Missing DT node for parent device.\n");
164 		return -EINVAL;
165 	}
166 
167 	audmix_pdev = of_find_device_by_node(audmix_np);
168 	if (!audmix_pdev) {
169 		dev_err(&pdev->dev, "Missing AUDMIX platform device for %s\n",
170 			np->full_name);
171 		return -EINVAL;
172 	}
173 	put_device(&audmix_pdev->dev);
174 
175 	num_dai = of_count_phandle_with_args(audmix_np, "dais", NULL);
176 	if (num_dai != FSL_AUDMIX_MAX_DAIS) {
177 		dev_err(&pdev->dev, "Need 2 dais to be provided for %s\n",
178 			audmix_np->full_name);
179 		return -EINVAL;
180 	}
181 
182 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
183 	if (!priv)
184 		return -ENOMEM;
185 
186 	priv->num_dai = 2 * num_dai;
187 	priv->dai = devm_kcalloc(&pdev->dev, priv->num_dai,
188 				 sizeof(struct snd_soc_dai_link), GFP_KERNEL);
189 	if (!priv->dai)
190 		return -ENOMEM;
191 
192 	priv->num_dai_conf = num_dai;
193 	priv->dai_conf = devm_kcalloc(&pdev->dev, priv->num_dai_conf,
194 				      sizeof(struct snd_soc_codec_conf),
195 				      GFP_KERNEL);
196 	if (!priv->dai_conf)
197 		return -ENOMEM;
198 
199 	priv->num_dapm_routes = 3 * num_dai;
200 	priv->dapm_routes = devm_kcalloc(&pdev->dev, priv->num_dapm_routes,
201 					 sizeof(struct snd_soc_dapm_route),
202 					 GFP_KERNEL);
203 	if (!priv->dapm_routes)
204 		return -ENOMEM;
205 
206 	for (i = 0; i < num_dai; i++) {
207 		struct snd_soc_dai_link_component *dlc;
208 
209 		/* for CPU x 2 */
210 		dlc = devm_kcalloc(&pdev->dev, 2, sizeof(*dlc), GFP_KERNEL);
211 		if (!dlc)
212 			return -ENOMEM;
213 
214 		ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i,
215 						 &args);
216 		if (ret < 0) {
217 			dev_err(&pdev->dev, "of_parse_phandle_with_args failed\n");
218 			return ret;
219 		}
220 
221 		cpu_pdev = of_find_device_by_node(args.np);
222 		if (!cpu_pdev) {
223 			dev_err(&pdev->dev, "failed to find SAI platform device\n");
224 			return -EINVAL;
225 		}
226 		put_device(&cpu_pdev->dev);
227 
228 		dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s",
229 					  fe_name_pref, args.np->full_name + 1);
230 		if (!dai_name)
231 			return -ENOMEM;
232 
233 		dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name);
234 
235 		if (i == 0) {
236 			out_cpu_np = args.np;
237 			capture_dai_name =
238 				devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
239 					       dai_name, "CPU-Capture");
240 			if (!capture_dai_name)
241 				return -ENOMEM;
242 		}
243 
244 		/*
245 		 * CPU == Platform
246 		 * platform is using soc-generic-dmaengine-pcm
247 		 */
248 		priv->dai[i].cpus	=
249 		priv->dai[i].platforms	= &dlc[0];
250 		priv->dai[i].codecs	= &asoc_dummy_dlc;
251 
252 		priv->dai[i].num_cpus = 1;
253 		priv->dai[i].num_codecs = 1;
254 		priv->dai[i].num_platforms = 1;
255 
256 		priv->dai[i].name = dai_name;
257 		priv->dai[i].stream_name = "HiFi-AUDMIX-FE";
258 		priv->dai[i].cpus->of_node = args.np;
259 		priv->dai[i].cpus->dai_name = dev_name(&cpu_pdev->dev);
260 		priv->dai[i].dynamic = 1;
261 		priv->dai[i].dpcm_playback = 1;
262 		priv->dai[i].dpcm_capture = (i == 0 ? 1 : 0);
263 		priv->dai[i].ignore_pmdown_time = 1;
264 		priv->dai[i].ops = &imx_audmix_fe_ops;
265 
266 		/* Add AUDMIX Backend */
267 		be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
268 					 "audmix-%d", i);
269 		be_pb = devm_kasprintf(&pdev->dev, GFP_KERNEL,
270 				       "AUDMIX-Playback-%d", i);
271 		be_cp = devm_kasprintf(&pdev->dev, GFP_KERNEL,
272 				       "AUDMIX-Capture-%d", i);
273 		if (!be_name || !be_pb || !be_cp)
274 			return -ENOMEM;
275 
276 		priv->dai[num_dai + i].cpus	= &dlc[1];
277 		priv->dai[num_dai + i].codecs	= &asoc_dummy_dlc;
278 
279 		priv->dai[num_dai + i].num_cpus = 1;
280 		priv->dai[num_dai + i].num_codecs = 1;
281 
282 		priv->dai[num_dai + i].name = be_name;
283 		priv->dai[num_dai + i].cpus->of_node = audmix_np;
284 		priv->dai[num_dai + i].cpus->dai_name = be_name;
285 		priv->dai[num_dai + i].no_pcm = 1;
286 		priv->dai[num_dai + i].dpcm_playback = 1;
287 		priv->dai[num_dai + i].dpcm_capture  = 1;
288 		priv->dai[num_dai + i].ignore_pmdown_time = 1;
289 		priv->dai[num_dai + i].ops = &imx_audmix_be_ops;
290 
291 		priv->dai_conf[i].dlc.of_node = args.np;
292 		priv->dai_conf[i].name_prefix = dai_name;
293 
294 		priv->dapm_routes[i].source =
295 			devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
296 				       dai_name, "CPU-Playback");
297 		if (!priv->dapm_routes[i].source)
298 			return -ENOMEM;
299 
300 		priv->dapm_routes[i].sink = be_pb;
301 		priv->dapm_routes[num_dai + i].source   = be_pb;
302 		priv->dapm_routes[num_dai + i].sink     = be_cp;
303 		priv->dapm_routes[2 * num_dai + i].source = be_cp;
304 		priv->dapm_routes[2 * num_dai + i].sink   = capture_dai_name;
305 	}
306 
307 	cpu_pdev = of_find_device_by_node(out_cpu_np);
308 	if (!cpu_pdev) {
309 		dev_err(&pdev->dev, "failed to find SAI platform device\n");
310 		return -EINVAL;
311 	}
312 	put_device(&cpu_pdev->dev);
313 
314 	priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1");
315 	if (IS_ERR(priv->cpu_mclk)) {
316 		ret = PTR_ERR(priv->cpu_mclk);
317 		dev_err(&cpu_pdev->dev, "failed to get DAI mclk1: %d\n", ret);
318 		return ret;
319 	}
320 
321 	priv->audmix_pdev = audmix_pdev;
322 	priv->out_pdev  = cpu_pdev;
323 
324 	priv->card.dai_link = priv->dai;
325 	priv->card.num_links = priv->num_dai;
326 	priv->card.codec_conf = priv->dai_conf;
327 	priv->card.num_configs = priv->num_dai_conf;
328 	priv->card.dapm_routes = priv->dapm_routes;
329 	priv->card.num_dapm_routes = priv->num_dapm_routes;
330 	priv->card.dev = &pdev->dev;
331 	priv->card.owner = THIS_MODULE;
332 	priv->card.name = "imx-audmix";
333 
334 	platform_set_drvdata(pdev, &priv->card);
335 	snd_soc_card_set_drvdata(&priv->card, priv);
336 
337 	ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
338 	if (ret) {
339 		dev_err(&pdev->dev, "snd_soc_register_card failed\n");
340 		return ret;
341 	}
342 
343 	return ret;
344 }
345 
346 static struct platform_driver imx_audmix_driver = {
347 	.probe = imx_audmix_probe,
348 	.driver = {
349 		.name = "imx-audmix",
350 		.pm = &snd_soc_pm_ops,
351 	},
352 };
353 module_platform_driver(imx_audmix_driver);
354 
355 MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver");
356 MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");
357 MODULE_ALIAS("platform:imx-audmix");
358 MODULE_LICENSE("GPL v2");
359