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 * http://www.opensource.org/licenses/gpl-license.html 10 * http://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 = substream->private_data; 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 = substream->private_data; 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 slave, and for record is master */ 84 fmt |= tx ? SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBM_CFM; 85 dir = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN; 86 87 /* set DAI configuration */ 88 ret = snd_soc_dai_set_fmt(rtd->cpu_dai, 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(rtd->cpu_dai, 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(rtd->cpu_dai, 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 = substream->private_data; 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 slave */ 125 fmt |= SND_SOC_DAIFMT_CBM_CFM; 126 127 /* set AUDMIX DAI configuration */ 128 ret = snd_soc_dai_set_fmt(rtd->cpu_dai, 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 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 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, "Missign 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 } 174 175 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_kzalloc(&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_kzalloc(&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_kzalloc(&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 ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i, 208 &args); 209 if (ret < 0) { 210 dev_err(&pdev->dev, "of_parse_phandle_with_args failed\n"); 211 return ret; 212 } 213 214 cpu_pdev = of_find_device_by_node(args.np); 215 if (!cpu_pdev) { 216 dev_err(&pdev->dev, "failed to find SAI platform device\n"); 217 return -EINVAL; 218 } 219 220 dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s", 221 fe_name_pref, args.np->full_name + 1); 222 223 dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name); 224 225 if (i == 0) { 226 out_cpu_np = args.np; 227 capture_dai_name = 228 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s", 229 dai_name, "CPU-Capture"); 230 } 231 232 priv->dai[i].name = dai_name; 233 priv->dai[i].stream_name = "HiFi-AUDMIX-FE"; 234 priv->dai[i].codec_dai_name = "snd-soc-dummy-dai"; 235 priv->dai[i].codec_name = "snd-soc-dummy"; 236 priv->dai[i].cpu_of_node = args.np; 237 priv->dai[i].cpu_dai_name = dev_name(&cpu_pdev->dev); 238 priv->dai[i].platform_of_node = args.np; 239 priv->dai[i].dynamic = 1; 240 priv->dai[i].dpcm_playback = 1; 241 priv->dai[i].dpcm_capture = (i == 0 ? 1 : 0); 242 priv->dai[i].ignore_pmdown_time = 1; 243 priv->dai[i].ops = &imx_audmix_fe_ops; 244 245 /* Add AUDMIX Backend */ 246 be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, 247 "audmix-%d", i); 248 be_pb = devm_kasprintf(&pdev->dev, GFP_KERNEL, 249 "AUDMIX-Playback-%d", i); 250 be_cp = devm_kasprintf(&pdev->dev, GFP_KERNEL, 251 "AUDMIX-Capture-%d", i); 252 253 priv->dai[num_dai + i].name = be_name; 254 priv->dai[num_dai + i].codec_dai_name = "snd-soc-dummy-dai"; 255 priv->dai[num_dai + i].codec_name = "snd-soc-dummy"; 256 priv->dai[num_dai + i].cpu_of_node = audmix_np; 257 priv->dai[num_dai + i].cpu_dai_name = be_name; 258 priv->dai[num_dai + i].platform_name = "snd-soc-dummy"; 259 priv->dai[num_dai + i].no_pcm = 1; 260 priv->dai[num_dai + i].dpcm_playback = 1; 261 priv->dai[num_dai + i].dpcm_capture = 1; 262 priv->dai[num_dai + i].ignore_pmdown_time = 1; 263 priv->dai[num_dai + i].ops = &imx_audmix_be_ops; 264 265 priv->dai_conf[i].of_node = args.np; 266 priv->dai_conf[i].name_prefix = dai_name; 267 268 priv->dapm_routes[i].source = 269 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s", 270 dai_name, "CPU-Playback"); 271 priv->dapm_routes[i].sink = be_pb; 272 priv->dapm_routes[num_dai + i].source = be_pb; 273 priv->dapm_routes[num_dai + i].sink = be_cp; 274 priv->dapm_routes[2 * num_dai + i].source = be_cp; 275 priv->dapm_routes[2 * num_dai + i].sink = capture_dai_name; 276 } 277 278 cpu_pdev = of_find_device_by_node(out_cpu_np); 279 if (!cpu_pdev) { 280 dev_err(&pdev->dev, "failed to find SAI platform device\n"); 281 return -EINVAL; 282 } 283 priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1"); 284 if (IS_ERR(priv->cpu_mclk)) { 285 ret = PTR_ERR(priv->cpu_mclk); 286 dev_err(&cpu_pdev->dev, "failed to get DAI mclk1: %d\n", ret); 287 return -EINVAL; 288 } 289 290 priv->audmix_pdev = audmix_pdev; 291 priv->out_pdev = cpu_pdev; 292 293 priv->card.dai_link = priv->dai; 294 priv->card.num_links = priv->num_dai; 295 priv->card.codec_conf = priv->dai_conf; 296 priv->card.num_configs = priv->num_dai_conf; 297 priv->card.dapm_routes = priv->dapm_routes; 298 priv->card.num_dapm_routes = priv->num_dapm_routes; 299 priv->card.dev = pdev->dev.parent; 300 priv->card.owner = THIS_MODULE; 301 priv->card.name = "imx-audmix"; 302 303 platform_set_drvdata(pdev, &priv->card); 304 snd_soc_card_set_drvdata(&priv->card, priv); 305 306 ret = devm_snd_soc_register_card(pdev->dev.parent, &priv->card); 307 if (ret) { 308 dev_err(&pdev->dev, "snd_soc_register_card failed\n"); 309 return ret; 310 } 311 312 return ret; 313 } 314 315 static struct platform_driver imx_audmix_driver = { 316 .probe = imx_audmix_probe, 317 .driver = { 318 .name = "imx-audmix", 319 .pm = &snd_soc_pm_ops, 320 }, 321 }; 322 module_platform_driver(imx_audmix_driver); 323 324 MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver"); 325 MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>"); 326 MODULE_ALIAS("platform:imx-audmix"); 327 MODULE_LICENSE("GPL v2"); 328