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 <linux/pm_runtime.h> 19 #include "fsl_sai.h" 20 #include "fsl_audmix.h" 21 22 struct imx_audmix { 23 struct platform_device *pdev; 24 struct snd_soc_card card; 25 struct platform_device *audmix_pdev; 26 struct platform_device *out_pdev; 27 struct clk *cpu_mclk; 28 int num_dai; 29 struct snd_soc_dai_link *dai; 30 int num_dai_conf; 31 struct snd_soc_codec_conf *dai_conf; 32 int num_dapm_routes; 33 struct snd_soc_dapm_route *dapm_routes; 34 }; 35 36 static const u32 imx_audmix_rates[] = { 37 8000, 12000, 16000, 24000, 32000, 48000, 64000, 96000, 38 }; 39 40 static const struct snd_pcm_hw_constraint_list imx_audmix_rate_constraints = { 41 .count = ARRAY_SIZE(imx_audmix_rates), 42 .list = imx_audmix_rates, 43 }; 44 45 static int imx_audmix_fe_startup(struct snd_pcm_substream *substream) 46 { 47 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 48 struct imx_audmix *priv = snd_soc_card_get_drvdata(rtd->card); 49 struct snd_pcm_runtime *runtime = substream->runtime; 50 struct device *dev = rtd->card->dev; 51 unsigned long clk_rate = clk_get_rate(priv->cpu_mclk); 52 int ret; 53 54 if (clk_rate % 24576000 == 0) { 55 ret = snd_pcm_hw_constraint_list(runtime, 0, 56 SNDRV_PCM_HW_PARAM_RATE, 57 &imx_audmix_rate_constraints); 58 if (ret < 0) 59 return ret; 60 } else { 61 dev_warn(dev, "mclk may be not supported %lu\n", clk_rate); 62 } 63 64 ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 65 1, 8); 66 if (ret < 0) 67 return ret; 68 69 return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, 70 FSL_AUDMIX_FORMATS); 71 } 72 73 static int imx_audmix_fe_hw_params(struct snd_pcm_substream *substream, 74 struct snd_pcm_hw_params *params) 75 { 76 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 77 struct device *dev = rtd->card->dev; 78 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 79 unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF; 80 u32 channels = params_channels(params); 81 int ret, dir; 82 83 /* For playback the AUDMIX is consumer, and for record is provider */ 84 fmt |= tx ? SND_SOC_DAIFMT_BP_FP : SND_SOC_DAIFMT_BC_FC; 85 dir = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN; 86 87 /* set DAI configuration */ 88 ret = snd_soc_dai_set_fmt(asoc_rtd_to_cpu(rtd, 0), fmt); 89 if (ret) { 90 dev_err(dev, "failed to set cpu dai fmt: %d\n", ret); 91 return ret; 92 } 93 94 ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), FSL_SAI_CLK_MAST1, 0, dir); 95 if (ret) { 96 dev_err(dev, "failed to set cpu sysclk: %d\n", ret); 97 return ret; 98 } 99 100 /* 101 * Per datasheet, AUDMIX expects 8 slots and 32 bits 102 * for every slot in TDM mode. 103 */ 104 ret = snd_soc_dai_set_tdm_slot(asoc_rtd_to_cpu(rtd, 0), BIT(channels) - 1, 105 BIT(channels) - 1, 8, 32); 106 if (ret) 107 dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret); 108 109 return ret; 110 } 111 112 static int imx_audmix_be_hw_params(struct snd_pcm_substream *substream, 113 struct snd_pcm_hw_params *params) 114 { 115 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 116 struct device *dev = rtd->card->dev; 117 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 118 unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF; 119 int ret; 120 121 if (!tx) 122 return 0; 123 124 /* For playback the AUDMIX is consumer */ 125 fmt |= SND_SOC_DAIFMT_BC_FC; 126 127 /* set AUDMIX DAI configuration */ 128 ret = snd_soc_dai_set_fmt(asoc_rtd_to_cpu(rtd, 0), fmt); 129 if (ret) 130 dev_err(dev, "failed to set AUDMIX DAI fmt: %d\n", ret); 131 132 return ret; 133 } 134 135 static const struct snd_soc_ops imx_audmix_fe_ops = { 136 .startup = imx_audmix_fe_startup, 137 .hw_params = imx_audmix_fe_hw_params, 138 }; 139 140 static const struct snd_soc_ops imx_audmix_be_ops = { 141 .hw_params = imx_audmix_be_hw_params, 142 }; 143 144 static int imx_audmix_probe(struct platform_device *pdev) 145 { 146 struct device_node *np = pdev->dev.of_node; 147 struct device_node *audmix_np = NULL, *out_cpu_np = NULL; 148 struct platform_device *audmix_pdev = NULL; 149 struct platform_device *cpu_pdev; 150 struct of_phandle_args args; 151 struct imx_audmix *priv; 152 int i, num_dai, ret; 153 const char *fe_name_pref = "HiFi-AUDMIX-FE-"; 154 char *be_name, *be_pb, *be_cp, *dai_name, *capture_dai_name; 155 156 if (pdev->dev.parent) { 157 audmix_np = pdev->dev.parent->of_node; 158 } else { 159 dev_err(&pdev->dev, "Missing parent device.\n"); 160 return -EINVAL; 161 } 162 163 if (!audmix_np) { 164 dev_err(&pdev->dev, "Missing DT node for parent device.\n"); 165 return -EINVAL; 166 } 167 168 audmix_pdev = of_find_device_by_node(audmix_np); 169 if (!audmix_pdev) { 170 dev_err(&pdev->dev, "Missing AUDMIX platform device for %s\n", 171 np->full_name); 172 return -EINVAL; 173 } 174 put_device(&audmix_pdev->dev); 175 176 num_dai = of_count_phandle_with_args(audmix_np, "dais", NULL); 177 if (num_dai != FSL_AUDMIX_MAX_DAIS) { 178 dev_err(&pdev->dev, "Need 2 dais to be provided for %s\n", 179 audmix_np->full_name); 180 return -EINVAL; 181 } 182 183 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 184 if (!priv) 185 return -ENOMEM; 186 187 priv->num_dai = 2 * num_dai; 188 priv->dai = devm_kcalloc(&pdev->dev, priv->num_dai, 189 sizeof(struct snd_soc_dai_link), GFP_KERNEL); 190 if (!priv->dai) 191 return -ENOMEM; 192 193 priv->num_dai_conf = num_dai; 194 priv->dai_conf = devm_kcalloc(&pdev->dev, priv->num_dai_conf, 195 sizeof(struct snd_soc_codec_conf), 196 GFP_KERNEL); 197 if (!priv->dai_conf) 198 return -ENOMEM; 199 200 priv->num_dapm_routes = 3 * num_dai; 201 priv->dapm_routes = devm_kcalloc(&pdev->dev, priv->num_dapm_routes, 202 sizeof(struct snd_soc_dapm_route), 203 GFP_KERNEL); 204 if (!priv->dapm_routes) 205 return -ENOMEM; 206 207 for (i = 0; i < num_dai; i++) { 208 struct snd_soc_dai_link_component *dlc; 209 210 /* for CPU/Codec x 2 */ 211 dlc = devm_kcalloc(&pdev->dev, 4, sizeof(*dlc), GFP_KERNEL); 212 if (!dlc) 213 return -ENOMEM; 214 215 ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i, 216 &args); 217 if (ret < 0) { 218 dev_err(&pdev->dev, "of_parse_phandle_with_args failed\n"); 219 return ret; 220 } 221 222 cpu_pdev = of_find_device_by_node(args.np); 223 if (!cpu_pdev) { 224 dev_err(&pdev->dev, "failed to find SAI platform device\n"); 225 return -EINVAL; 226 } 227 put_device(&cpu_pdev->dev); 228 229 dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s", 230 fe_name_pref, args.np->full_name + 1); 231 232 dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name); 233 234 if (i == 0) { 235 out_cpu_np = args.np; 236 capture_dai_name = 237 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s", 238 dai_name, "CPU-Capture"); 239 } 240 241 /* 242 * CPU == Platform 243 * platform is using soc-generic-dmaengine-pcm 244 */ 245 priv->dai[i].cpus = 246 priv->dai[i].platforms = &dlc[0]; 247 priv->dai[i].codecs = &dlc[1]; 248 249 priv->dai[i].num_cpus = 1; 250 priv->dai[i].num_codecs = 1; 251 priv->dai[i].num_platforms = 1; 252 253 priv->dai[i].name = dai_name; 254 priv->dai[i].stream_name = "HiFi-AUDMIX-FE"; 255 priv->dai[i].codecs->dai_name = "snd-soc-dummy-dai"; 256 priv->dai[i].codecs->name = "snd-soc-dummy"; 257 priv->dai[i].cpus->of_node = args.np; 258 priv->dai[i].cpus->dai_name = dev_name(&cpu_pdev->dev); 259 priv->dai[i].dynamic = 1; 260 priv->dai[i].dpcm_playback = 1; 261 priv->dai[i].dpcm_capture = (i == 0 ? 1 : 0); 262 priv->dai[i].ignore_pmdown_time = 1; 263 priv->dai[i].ops = &imx_audmix_fe_ops; 264 265 /* Add AUDMIX Backend */ 266 be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, 267 "audmix-%d", i); 268 be_pb = devm_kasprintf(&pdev->dev, GFP_KERNEL, 269 "AUDMIX-Playback-%d", i); 270 be_cp = devm_kasprintf(&pdev->dev, GFP_KERNEL, 271 "AUDMIX-Capture-%d", i); 272 273 priv->dai[num_dai + i].cpus = &dlc[2]; 274 priv->dai[num_dai + i].codecs = &dlc[3]; 275 276 priv->dai[num_dai + i].num_cpus = 1; 277 priv->dai[num_dai + i].num_codecs = 1; 278 279 priv->dai[num_dai + i].name = be_name; 280 priv->dai[num_dai + i].codecs->dai_name = "snd-soc-dummy-dai"; 281 priv->dai[num_dai + i].codecs->name = "snd-soc-dummy"; 282 priv->dai[num_dai + i].cpus->of_node = audmix_np; 283 priv->dai[num_dai + i].cpus->dai_name = be_name; 284 priv->dai[num_dai + i].no_pcm = 1; 285 priv->dai[num_dai + i].dpcm_playback = 1; 286 priv->dai[num_dai + i].dpcm_capture = 1; 287 priv->dai[num_dai + i].ignore_pmdown_time = 1; 288 priv->dai[num_dai + i].ops = &imx_audmix_be_ops; 289 290 priv->dai_conf[i].dlc.of_node = args.np; 291 priv->dai_conf[i].name_prefix = dai_name; 292 293 priv->dapm_routes[i].source = 294 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s", 295 dai_name, "CPU-Playback"); 296 priv->dapm_routes[i].sink = be_pb; 297 priv->dapm_routes[num_dai + i].source = be_pb; 298 priv->dapm_routes[num_dai + i].sink = be_cp; 299 priv->dapm_routes[2 * num_dai + i].source = be_cp; 300 priv->dapm_routes[2 * num_dai + i].sink = capture_dai_name; 301 } 302 303 cpu_pdev = of_find_device_by_node(out_cpu_np); 304 if (!cpu_pdev) { 305 dev_err(&pdev->dev, "failed to find SAI platform device\n"); 306 return -EINVAL; 307 } 308 put_device(&cpu_pdev->dev); 309 310 priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1"); 311 if (IS_ERR(priv->cpu_mclk)) { 312 ret = PTR_ERR(priv->cpu_mclk); 313 dev_err(&cpu_pdev->dev, "failed to get DAI mclk1: %d\n", ret); 314 return -EINVAL; 315 } 316 317 priv->audmix_pdev = audmix_pdev; 318 priv->out_pdev = cpu_pdev; 319 320 priv->card.dai_link = priv->dai; 321 priv->card.num_links = priv->num_dai; 322 priv->card.codec_conf = priv->dai_conf; 323 priv->card.num_configs = priv->num_dai_conf; 324 priv->card.dapm_routes = priv->dapm_routes; 325 priv->card.num_dapm_routes = priv->num_dapm_routes; 326 priv->card.dev = &pdev->dev; 327 priv->card.owner = THIS_MODULE; 328 priv->card.name = "imx-audmix"; 329 330 platform_set_drvdata(pdev, &priv->card); 331 snd_soc_card_set_drvdata(&priv->card, priv); 332 333 ret = devm_snd_soc_register_card(&pdev->dev, &priv->card); 334 if (ret) { 335 dev_err(&pdev->dev, "snd_soc_register_card failed\n"); 336 return ret; 337 } 338 339 return ret; 340 } 341 342 static struct platform_driver imx_audmix_driver = { 343 .probe = imx_audmix_probe, 344 .driver = { 345 .name = "imx-audmix", 346 .pm = &snd_soc_pm_ops, 347 }, 348 }; 349 module_platform_driver(imx_audmix_driver); 350 351 MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver"); 352 MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>"); 353 MODULE_ALIAS("platform:imx-audmix"); 354 MODULE_LICENSE("GPL v2"); 355