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 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(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(&audmix_pdev->dev); 174 175 num_dai = of_count_phandle_with_args(audmix_np, "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(&pdev->dev, sizeof(*priv), GFP_KERNEL); 183 if (!priv) 184 return -ENOMEM; 185 186 priv->num_dai = 2 * num_dai; 187 priv->dai = devm_kcalloc(&pdev->dev, priv->num_dai, 188 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(&pdev->dev, priv->num_dai_conf, 194 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(&pdev->dev, priv->num_dapm_routes, 201 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(&pdev->dev, 2, sizeof(*dlc), GFP_KERNEL); 211 if (!dlc) 212 return -ENOMEM; 213 214 ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i, 215 &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(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(&cpu_pdev->dev); 227 228 dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%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(&pdev->dev, GFP_KERNEL, "%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(&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(&pdev->dev, GFP_KERNEL, 268 "audmix-%d", i); 269 be_pb = devm_kasprintf(&pdev->dev, GFP_KERNEL, 270 "AUDMIX-Playback-%d", i); 271 be_cp = devm_kasprintf(&pdev->dev, GFP_KERNEL, 272 "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(&pdev->dev, GFP_KERNEL, "%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(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(&cpu_pdev->dev); 313 314 priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1"); 315 if (IS_ERR(priv->cpu_mclk)) { 316 ret = PTR_ERR(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, &priv->card); 335 snd_soc_card_set_drvdata(&priv->card, priv); 336 337 ret = devm_snd_soc_register_card(&pdev->dev, &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 } 345 346 static 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 }; 353 module_platform_driver(imx_audmix_driver); 354 355 MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver"); 356 MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>"); 357 MODULE_ALIAS("platform:imx-audmix"); 358 MODULE_LICENSE("GPL v2"); 359