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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright 2017 NXP4 *5 * The code contained herein is licensed under the GNU General Public6 * License. You may obtain a copy of the GNU General Public License7 * Version 2 or later at the following locations:8 *9 * https://www.opensource.org/licenses/gpl-license.html10 * https://www.gnu.org/copyleft/gpl.html11 */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(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 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(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 bits101 * 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 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 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 150static 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 else226 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 == Platform252 * platform is using soc-generic-dmaengine-pcm253 */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 357static 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};364module_platform_driver(imx_audmix_driver);365 366MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver");367MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");368MODULE_ALIAS("platform:imx-audmix");369MODULE_LICENSE("GPL v2");370