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 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 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 } 110 111 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 }; 149 150 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 if (i == num_dai - 1) 268 priv->dai[i].capture_only = 1; 269 else 270 priv->dai[i].playback_only = 1; 271 priv->dai[i].ignore_pmdown_time = 1; 272 priv->dai[i].ops = &imx_audmix_fe_ops; 273 274 /* Add AUDMIX Backend */ 275 be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, 276 "audmix-%d", i); 277 if (!be_name) 278 return -ENOMEM; 279 280 priv->dai[num_dai + i].cpus = &dlc[1]; 281 priv->dai[num_dai + i].codecs = &snd_soc_dummy_dlc; 282 283 priv->dai[num_dai + i].num_cpus = 1; 284 priv->dai[num_dai + i].num_codecs = 1; 285 286 priv->dai[num_dai + i].name = be_name; 287 priv->dai[num_dai + i].cpus->of_node = audmix_np; 288 priv->dai[num_dai + i].cpus->dai_name = be_name; 289 priv->dai[num_dai + i].no_pcm = 1; 290 if (i == num_dai - 1) 291 priv->dai[num_dai + i].capture_only = 1; 292 else 293 priv->dai[num_dai + i].playback_only = 1; 294 priv->dai[num_dai + i].ignore_pmdown_time = 1; 295 priv->dai[num_dai + i].ops = &imx_audmix_be_ops; 296 297 priv->dai_conf[i].dlc.of_node = args.np; 298 priv->dai_conf[i].name_prefix = dai_name; 299 300 if (i == num_dai - 1) { 301 priv->dapm_routes[i].sink = 302 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s", 303 dai_name, name[2][i]); 304 if (!priv->dapm_routes[i].sink) 305 return -ENOMEM; 306 307 priv->dapm_routes[i].source = name[3][i]; 308 } else { 309 priv->dapm_routes[i].source = 310 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s", 311 dai_name, name[3][i]); 312 if (!priv->dapm_routes[i].source) 313 return -ENOMEM; 314 315 priv->dapm_routes[i].sink = name[2][i]; 316 } 317 } 318 319 cpu_pdev = of_find_device_by_node(out_cpu_np); 320 if (!cpu_pdev) { 321 dev_err(&pdev->dev, "failed to find SAI platform device\n"); 322 return -EINVAL; 323 } 324 put_device(&cpu_pdev->dev); 325 326 priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1"); 327 if (IS_ERR(priv->cpu_mclk)) { 328 ret = PTR_ERR(priv->cpu_mclk); 329 dev_err(&cpu_pdev->dev, "failed to get DAI mclk1: %d\n", ret); 330 return ret; 331 } 332 333 priv->audmix_pdev = audmix_pdev; 334 priv->out_pdev = cpu_pdev; 335 336 priv->card.dai_link = priv->dai; 337 priv->card.num_links = priv->num_dai; 338 priv->card.codec_conf = priv->dai_conf; 339 priv->card.num_configs = priv->num_dai_conf; 340 priv->card.dapm_routes = priv->dapm_routes; 341 priv->card.num_dapm_routes = priv->num_dapm_routes; 342 priv->card.dev = &pdev->dev; 343 priv->card.owner = THIS_MODULE; 344 priv->card.name = "imx-audmix"; 345 346 platform_set_drvdata(pdev, &priv->card); 347 snd_soc_card_set_drvdata(&priv->card, priv); 348 349 ret = devm_snd_soc_register_card(&pdev->dev, &priv->card); 350 if (ret) { 351 dev_err(&pdev->dev, "snd_soc_register_card failed\n"); 352 return ret; 353 } 354 355 return ret; 356 } 357 358 static struct platform_driver imx_audmix_driver = { 359 .probe = imx_audmix_probe, 360 .driver = { 361 .name = "imx-audmix", 362 .pm = &snd_soc_pm_ops, 363 }, 364 }; 365 module_platform_driver(imx_audmix_driver); 366 367 MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver"); 368 MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>"); 369 MODULE_ALIAS("platform:imx-audmix"); 370 MODULE_LICENSE("GPL v2"); 371