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 int num_dai; 27 struct snd_soc_dai_link *dai; 28 int num_dai_conf; 29 struct snd_soc_codec_conf *dai_conf; 30 int num_dapm_routes; 31 struct snd_soc_dapm_route *dapm_routes; 32 }; 33 34 static int imx_audmix_fe_startup(struct snd_pcm_substream *substream) 35 { 36 struct snd_pcm_runtime *runtime = substream->runtime; 37 int ret; 38 39 ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 40 1, 8); 41 if (ret < 0) 42 return ret; 43 44 return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, 45 FSL_AUDMIX_FORMATS); 46 } 47 48 static int imx_audmix_fe_hw_params(struct snd_pcm_substream *substream, 49 struct snd_pcm_hw_params *params) 50 { 51 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 52 struct device *dev = rtd->card->dev; 53 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 54 unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF; 55 u32 channels = params_channels(params); 56 int ret, dir; 57 58 /* For playback the AUDMIX is consumer, and for record is provider */ 59 fmt |= tx ? SND_SOC_DAIFMT_BP_FP : SND_SOC_DAIFMT_BC_FC; 60 dir = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN; 61 62 /* set DAI configuration */ 63 ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0), fmt); 64 if (ret) { 65 dev_err(dev, "failed to set cpu dai fmt: %d\n", ret); 66 return ret; 67 } 68 69 ret = snd_soc_dai_set_sysclk(snd_soc_rtd_to_cpu(rtd, 0), FSL_SAI_CLK_MAST1, 0, dir); 70 if (ret) { 71 dev_err(dev, "failed to set cpu sysclk: %d\n", ret); 72 return ret; 73 } 74 75 /* 76 * Per datasheet, AUDMIX expects 8 slots and 32 bits 77 * for every slot in TDM mode. 78 */ 79 ret = snd_soc_dai_set_tdm_slot(snd_soc_rtd_to_cpu(rtd, 0), BIT(channels) - 1, 80 BIT(channels) - 1, 8, 32); 81 if (ret) 82 dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret); 83 84 return ret; 85 } 86 87 static int imx_audmix_be_hw_params(struct snd_pcm_substream *substream, 88 struct snd_pcm_hw_params *params) 89 { 90 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 91 struct device *dev = rtd->card->dev; 92 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 93 unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF; 94 int ret; 95 96 if (!tx) 97 return 0; 98 99 /* For playback the AUDMIX is consumer */ 100 fmt |= SND_SOC_DAIFMT_BC_FC; 101 102 /* set AUDMIX DAI configuration */ 103 ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0), fmt); 104 if (ret) 105 dev_err(dev, "failed to set AUDMIX DAI fmt: %d\n", ret); 106 107 return ret; 108 } 109 110 static const struct snd_soc_ops imx_audmix_fe_ops = { 111 .startup = imx_audmix_fe_startup, 112 .hw_params = imx_audmix_fe_hw_params, 113 }; 114 115 static const struct snd_soc_ops imx_audmix_be_ops = { 116 .hw_params = imx_audmix_be_hw_params, 117 }; 118 119 static const char *name[][3] = { 120 {"HiFi-AUDMIX-FE-0", "HiFi-AUDMIX-FE-1", "HiFi-AUDMIX-FE-2"}, 121 {"sai-tx", "sai-tx", "sai-rx"}, 122 {"AUDMIX-Playback-0", "AUDMIX-Playback-1", "SAI-Capture"}, 123 {"SAI-Playback", "SAI-Playback", "AUDMIX-Capture-0"}, 124 }; 125 126 static int imx_audmix_probe(struct platform_device *pdev) 127 { 128 struct device_node *np = pdev->dev.of_node; 129 struct device_node *audmix_np = NULL, *out_cpu_np = NULL; 130 struct platform_device *audmix_pdev = NULL; 131 struct platform_device *cpu_pdev; 132 struct of_phandle_args args; 133 struct imx_audmix *priv; 134 int i, num_dai, ret; 135 const char *fe_name_pref = "HiFi-AUDMIX-FE-"; 136 char *be_name, *dai_name; 137 138 if (pdev->dev.parent) { 139 audmix_np = pdev->dev.parent->of_node; 140 } else { 141 dev_err(&pdev->dev, "Missing parent device.\n"); 142 return -EINVAL; 143 } 144 145 if (!audmix_np) { 146 dev_err(&pdev->dev, "Missing DT node for parent device.\n"); 147 return -EINVAL; 148 } 149 150 audmix_pdev = of_find_device_by_node(audmix_np); 151 if (!audmix_pdev) { 152 dev_err(&pdev->dev, "Missing AUDMIX platform device for %s\n", 153 np->full_name); 154 return -EINVAL; 155 } 156 put_device(&audmix_pdev->dev); 157 158 num_dai = of_count_phandle_with_args(audmix_np, "dais", NULL); 159 if (num_dai != FSL_AUDMIX_MAX_DAIS) { 160 dev_err(&pdev->dev, "Need 2 dais to be provided for %s\n", 161 audmix_np->full_name); 162 return -EINVAL; 163 } 164 165 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 166 if (!priv) 167 return -ENOMEM; 168 169 num_dai += 1; 170 priv->num_dai = 2 * num_dai; 171 priv->dai = devm_kcalloc(&pdev->dev, priv->num_dai, 172 sizeof(struct snd_soc_dai_link), GFP_KERNEL); 173 if (!priv->dai) 174 return -ENOMEM; 175 176 priv->num_dai_conf = num_dai; 177 priv->dai_conf = devm_kcalloc(&pdev->dev, priv->num_dai_conf, 178 sizeof(struct snd_soc_codec_conf), 179 GFP_KERNEL); 180 if (!priv->dai_conf) 181 return -ENOMEM; 182 183 priv->num_dapm_routes = num_dai; 184 priv->dapm_routes = devm_kcalloc(&pdev->dev, priv->num_dapm_routes, 185 sizeof(struct snd_soc_dapm_route), 186 GFP_KERNEL); 187 if (!priv->dapm_routes) 188 return -ENOMEM; 189 190 for (i = 0; i < num_dai; i++) { 191 struct snd_soc_dai_link_component *dlc; 192 193 /* for CPU x 2 */ 194 dlc = devm_kcalloc(&pdev->dev, 2, sizeof(*dlc), GFP_KERNEL); 195 if (!dlc) 196 return -ENOMEM; 197 198 if (i == num_dai - 1) 199 ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, 0, 200 &args); 201 else 202 ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i, 203 &args); 204 if (ret < 0) { 205 dev_err(&pdev->dev, "of_parse_phandle_with_args failed\n"); 206 return ret; 207 } 208 209 cpu_pdev = of_find_device_by_node(args.np); 210 if (!cpu_pdev) { 211 dev_err(&pdev->dev, "failed to find SAI platform device\n"); 212 return -EINVAL; 213 } 214 put_device(&cpu_pdev->dev); 215 216 dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s", 217 fe_name_pref, args.np->full_name); 218 if (!dai_name) 219 return -ENOMEM; 220 221 dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name); 222 223 if (i == num_dai - 1) 224 out_cpu_np = args.np; 225 226 /* 227 * CPU == Platform 228 * platform is using soc-generic-dmaengine-pcm 229 */ 230 priv->dai[i].cpus = 231 priv->dai[i].platforms = &dlc[0]; 232 priv->dai[i].codecs = &snd_soc_dummy_dlc; 233 234 priv->dai[i].num_cpus = 1; 235 priv->dai[i].num_codecs = 1; 236 priv->dai[i].num_platforms = 1; 237 priv->dai[i].name = name[0][i]; 238 priv->dai[i].stream_name = "HiFi-AUDMIX-FE"; 239 priv->dai[i].cpus->of_node = args.np; 240 priv->dai[i].cpus->dai_name = name[1][i]; 241 242 priv->dai[i].dynamic = 1; 243 if (i == num_dai - 1) 244 priv->dai[i].capture_only = 1; 245 else 246 priv->dai[i].playback_only = 1; 247 priv->dai[i].ignore_pmdown_time = 1; 248 priv->dai[i].ops = &imx_audmix_fe_ops; 249 250 /* Add AUDMIX Backend */ 251 be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, 252 "audmix-%d", i); 253 if (!be_name) 254 return -ENOMEM; 255 256 priv->dai[num_dai + i].cpus = &dlc[1]; 257 priv->dai[num_dai + i].codecs = &snd_soc_dummy_dlc; 258 259 priv->dai[num_dai + i].num_cpus = 1; 260 priv->dai[num_dai + i].num_codecs = 1; 261 262 priv->dai[num_dai + i].name = be_name; 263 priv->dai[num_dai + i].cpus->of_node = audmix_np; 264 priv->dai[num_dai + i].cpus->dai_name = be_name; 265 priv->dai[num_dai + i].no_pcm = 1; 266 if (i == num_dai - 1) 267 priv->dai[num_dai + i].capture_only = 1; 268 else 269 priv->dai[num_dai + i].playback_only = 1; 270 priv->dai[num_dai + i].ignore_pmdown_time = 1; 271 priv->dai[num_dai + i].ops = &imx_audmix_be_ops; 272 273 priv->dai_conf[i].dlc.of_node = args.np; 274 priv->dai_conf[i].name_prefix = dai_name; 275 276 if (i == num_dai - 1) { 277 priv->dapm_routes[i].sink = 278 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s", 279 dai_name, name[2][i]); 280 if (!priv->dapm_routes[i].sink) 281 return -ENOMEM; 282 283 priv->dapm_routes[i].source = name[3][i]; 284 } else { 285 priv->dapm_routes[i].source = 286 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s", 287 dai_name, name[3][i]); 288 if (!priv->dapm_routes[i].source) 289 return -ENOMEM; 290 291 priv->dapm_routes[i].sink = name[2][i]; 292 } 293 } 294 295 cpu_pdev = of_find_device_by_node(out_cpu_np); 296 if (!cpu_pdev) { 297 dev_err(&pdev->dev, "failed to find SAI platform device\n"); 298 return -EINVAL; 299 } 300 put_device(&cpu_pdev->dev); 301 302 priv->audmix_pdev = audmix_pdev; 303 priv->out_pdev = cpu_pdev; 304 305 priv->card.dai_link = priv->dai; 306 priv->card.num_links = priv->num_dai; 307 priv->card.codec_conf = priv->dai_conf; 308 priv->card.num_configs = priv->num_dai_conf; 309 priv->card.dapm_routes = priv->dapm_routes; 310 priv->card.num_dapm_routes = priv->num_dapm_routes; 311 priv->card.dev = &pdev->dev; 312 priv->card.owner = THIS_MODULE; 313 priv->card.name = "imx-audmix"; 314 315 platform_set_drvdata(pdev, &priv->card); 316 snd_soc_card_set_drvdata(&priv->card, priv); 317 318 ret = devm_snd_soc_register_card(&pdev->dev, &priv->card); 319 if (ret) { 320 dev_err(&pdev->dev, "snd_soc_register_card failed\n"); 321 return ret; 322 } 323 324 return ret; 325 } 326 327 static struct platform_driver imx_audmix_driver = { 328 .probe = imx_audmix_probe, 329 .driver = { 330 .name = "imx-audmix", 331 .pm = &snd_soc_pm_ops, 332 }, 333 }; 334 module_platform_driver(imx_audmix_driver); 335 336 MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver"); 337 MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>"); 338 MODULE_ALIAS("platform:imx-audmix"); 339 MODULE_LICENSE("GPL v2"); 340