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
21struct 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
35static const u32 imx_audmix_rates[] = {
36 8000, 12000, 16000, 24000, 32000, 48000, 64000, 96000,
37};
38
39static 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
44static 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(card: 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(clk: priv->cpu_mclk);
51 int ret;
52
53 if (clk_rate % 24576000 == 0) {
54 ret = snd_pcm_hw_constraint_list(runtime, cond: 0,
55 SNDRV_PCM_HW_PARAM_RATE,
56 l: &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 min: 1, max: 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
72static 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(p: 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, freq: 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, slots: 8, slot_width: 32);
105 if (ret)
106 dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
107
108 return ret;
109}
110
111static 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
134static 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
139static const struct snd_soc_ops imx_audmix_be_ops = {
140 .hw_params = imx_audmix_be_hw_params,
141};
142
143static 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(np: 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(dev: &audmix_pdev->dev);
174
175 num_dai = of_count_phandle_with_args(np: audmix_np, list_name: "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(dev: &pdev->dev, size: sizeof(*priv), GFP_KERNEL);
183 if (!priv)
184 return -ENOMEM;
185
186 priv->num_dai = 2 * num_dai;
187 priv->dai = devm_kcalloc(dev: &pdev->dev, n: priv->num_dai,
188 size: 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(dev: &pdev->dev, n: priv->num_dai_conf,
194 size: 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(dev: &pdev->dev, n: priv->num_dapm_routes,
201 size: 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(dev: &pdev->dev, n: 2, size: sizeof(*dlc), GFP_KERNEL);
211 if (!dlc)
212 return -ENOMEM;
213
214 ret = of_parse_phandle_with_args(np: audmix_np, list_name: "dais", NULL, index: i,
215 out_args: &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(np: 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(dev: &cpu_pdev->dev);
227
228 dai_name = devm_kasprintf(dev: &pdev->dev, GFP_KERNEL, fmt: "%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(dev: &pdev->dev, GFP_KERNEL, fmt: "%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 = &snd_soc_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(dev: &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(dev: &pdev->dev, GFP_KERNEL,
268 fmt: "audmix-%d", i);
269 be_pb = devm_kasprintf(dev: &pdev->dev, GFP_KERNEL,
270 fmt: "AUDMIX-Playback-%d", i);
271 be_cp = devm_kasprintf(dev: &pdev->dev, GFP_KERNEL,
272 fmt: "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 = &snd_soc_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(dev: &pdev->dev, GFP_KERNEL, fmt: "%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(np: 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(dev: &cpu_pdev->dev);
313
314 priv->cpu_mclk = devm_clk_get(dev: &cpu_pdev->dev, id: "mclk1");
315 if (IS_ERR(ptr: priv->cpu_mclk)) {
316 ret = PTR_ERR(ptr: 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, data: &priv->card);
335 snd_soc_card_set_drvdata(card: &priv->card, data: priv);
336
337 ret = devm_snd_soc_register_card(dev: &pdev->dev, card: &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
346static 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};
353module_platform_driver(imx_audmix_driver);
354
355MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver");
356MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");
357MODULE_ALIAS("platform:imx-audmix");
358MODULE_LICENSE("GPL v2");
359

source code of linux/sound/soc/fsl/imx-audmix.c